diff --git a/testing/web-platform/tests/pointerevents/compat/pointerevent_mouse-pointer-preventdefault.html b/testing/web-platform/tests/pointerevents/compat/pointerevent_mouse-pointer-preventdefault.html
index c4990ff5f9db..549cbf55d881 100644
--- a/testing/web-platform/tests/pointerevents/compat/pointerevent_mouse-pointer-preventdefault.html
+++ b/testing/web-platform/tests/pointerevents/compat/pointerevent_mouse-pointer-preventdefault.html
@@ -17,119 +17,58 @@ div.box {
 </div>
 
 <script>
-var receivedEvents = [];
-var receivedMouseEvents = [];
-var receivedPointerEvents = [];
-var mouseEventList = ["mousedown", "mouseup", "mouseenter", "mouseleave", "mouseover", "mouseout", "mousemove"];
-var pointerEventList = ["pointerdown", "pointerup", "pointerenter", "pointerleave", "pointerover", "pointerout", "pointermove"];
+    var receivedEvents = [];
+    var receivedMouseEvents = [];
+    var receivedPointerEvents = [];
+    var mouseEventList = ["mousedown", "mouseup", "mouseenter", "mouseleave", "mouseover", "mouseout", "mousemove"];
+    var pointerEventList = ["pointerdown", "pointerup", "pointerenter", "pointerleave", "pointerover", "pointerout", "pointermove"];
 
-var preventDefaultList = ["none"].concat(pointerEventList);
-var eventToPreventDefault = "";
+    var preventDefaultList = ["none"].concat(pointerEventList);
+    var eventToPreventDefault = "";
 
-function init() {
-  var targetDiv = document.getElementById("target");
+    function init() {
+      var targetDiv = document.getElementById("target");
 
-  mouseEventList.forEach(function(eventName) {
-    targetDiv.addEventListener(eventName, function(event) {
-      receivedEvents.push(eventName);
-      receivedMouseEvents.push(eventName);
+    mouseEventList.forEach(function (eventName) {
+      targetDiv.addEventListener(eventName, function (event) {
+        receivedEvents.push(eventName);
+        receivedMouseEvents.push(eventName);
+      });
     });
-  });
 
-  pointerEventList.forEach(function(eventName) {
-    targetDiv.addEventListener(eventName, function(event) {
-      if (event.type == eventToPreventDefault) {
-        event.preventDefault();
-      }
-      receivedEvents.push(eventName);
-      receivedPointerEvents.push(eventName);
+    pointerEventList.forEach(function (eventName) {
+      targetDiv.addEventListener(eventName, function (event) {
+        if (event.type == eventToPreventDefault) {
+          event.preventDefault();
+        }
+        receivedEvents.push(eventName);
+        receivedPointerEvents.push(eventName);
+      });
     });
-  });
-}
+  }
 
-var expectedPointerEvents = new Map([
-  ["none", ["pointerover", "pointerenter", "pointermove", "pointerdown", "pointerup",
-            "pointerdown", "pointermove", "pointerout", "pointerleave",
-            "pointerover", "pointerenter", "pointermove", "pointerup", "pointerout",
-            "pointerleave"
-            ]],
-  ["pointerdown", ["pointerover", "pointerenter", "pointermove", "pointerdown",
-            "pointerup", "pointerdown", "pointermove", "pointerout", "pointerleave",
-            "pointerover", "pointerenter", "pointermove", "pointerup", "pointerout",
-            "pointerleave"
-            ]],
-  ["pointerup", ["pointerover", "pointerenter", "pointermove", "pointerdown",
-            "pointerup", "pointerdown", "pointermove", "pointerout", "pointerleave",
-            "pointerover", "pointerenter", "pointermove", "pointerup",
-            "pointerout", "pointerleave"
-            ]],
-  ["pointerenter", ["pointerover", "pointerenter", "pointermove",
-            "pointerdown", "pointerup", "pointerdown", "pointermove",
-            "pointerout", "pointerleave", "pointerover", "pointerenter",
-            "pointermove", "pointerup", "pointerout", "pointerleave"
-            ]],
-  ["pointerleave", ["pointerover", "pointerenter", "pointermove",
-            "pointerdown", "pointerup", "pointerdown", "pointermove",
-            "pointerout", "pointerleave", "pointerover", "pointerenter",
-            "pointermove", "pointerup", "pointerout", "pointerleave"
-            ]],
-  ["pointerover", ["pointerover", "pointerenter", "pointermove",
-            "pointerdown", "pointerup", "pointerdown", "pointermove",
-            "pointerout", "pointerleave", "pointerover", "pointerenter",
-            "pointermove", "pointerup", "pointerout",
-            "pointerleave"
-            ]],
-  ["pointerout", ["pointerover", "pointerenter", "pointermove",
-            "pointerdown", "pointerup", "pointerdown", "pointermove",
-            "pointerout", "pointerleave", "pointerover", "pointerenter",
-            "pointermove", "pointerup", "pointerout",
-            "pointerleave"
-            ]],
-  ["pointermove", ["pointerover", "pointerenter", "pointermove",
-            "pointerdown", "pointerup", "pointerdown", "pointermove",
-            "pointerout", "pointerleave", "pointerover", "pointerenter",
-            "pointermove", "pointerup", "pointerout", "pointerleave"
-            ]]
-  ]);
-var expectedMouseEvents = new Map([
-  ["none", ["mouseover", "mouseenter", "mousemove", "mousedown", "mouseup",
-            "mousedown", "mousemove", "mouseout", "mouseleave",
-            "mouseover", "mouseenter", "mousemove", "mouseup", "mouseout", "mouseleave"
-            ]],
-  ["pointerdown", ["mouseover", "mouseenter", "mousemove",
-            "mouseout", "mouseleave", "mouseover", "mouseenter",
-            "mouseout", "mouseleave"
-            ]],
-  ["pointerup", ["mouseover", "mouseenter", "mousemove",
-            "mousedown", "mouseup", "mousedown", "mousemove",
-            "mouseout", "mouseleave", "mouseover",
-            "mouseenter", "mousemove", "mouseup", "mouseout", "mouseleave"
-            ]],
-  ["pointerenter", ["mouseover", "mouseenter", "mousemove", "mousedown",
-            "mouseup", "mousedown", "mousemove", "mouseout", "mouseleave",
-            "mouseover", "mouseenter", "mousemove", "mouseup", "mouseout", "mouseleave"
-            ]],
-  ["pointerleave", ["mouseover", "mouseenter", "mousemove", "mousedown",
-            "mouseup", "mousedown", "mousemove", "mouseout", "mouseleave",
-            "mouseover", "mouseenter", "mousemove", "mouseup",
-            "mouseout", "mouseleave"
-            ]],
-  ["pointerover", ["mouseover", "mouseenter", "mousemove",
-            "mousedown", "mouseup", "mousedown", "mousemove", "mouseout",
-            "mouseleave", "mouseover", "mouseenter", "mousemove", "mouseup",
-            "mouseout", "mouseleave"
-            ]],
-  ["pointerout", ["mouseover", "mouseenter", "mousemove",
-            "mousedown", "mouseup", "mousedown", "mousemove",
-            "mouseout", "mouseleave", "mouseover", "mouseenter",
-            "mousemove", "mouseup", "mouseout", "mouseleave"
-            ]],
-  ["pointermove", ["mouseover", "mouseenter", "mousemove",
-            "mousedown", "mouseup", "mousedown", "mousemove",
-            "mouseout", "mouseleave", "mouseover", "mouseenter",
-            "mousemove", "mouseup", "mouseout", "mouseleave"
-            ]]
-  ]);
+  function expectedPointerEvents() {
+    return [
+      "pointerover", "pointerenter", "pointermove", "pointerdown", "pointerup",
+      "pointerdown", "pointermove", "pointerout", "pointerleave", "pointerover",
+      "pointerenter", "pointermove", "pointerup", "pointerout", "pointerleave"
+    ];
+  }
+
+  // When "pointerdown" is not prevented, all compat mouse events are fired.
+  // Otherwise, the "mousedown/move/up" events between "pointerdown" and
+  // "pointerup" are suppressed.
+  function expectedMouseEvents(prevented_event) {
+    return prevented_event === "pointerdown"
+      ? ["mouseover", "mouseenter", "mousemove",
+        "mouseout", "mouseleave", "mouseover", "mouseenter",
+        "mouseout", "mouseleave"]
+      : ["mouseover", "mouseenter", "mousemove",
+        "mousedown", "mouseup", "mousedown", "mousemove",
+        "mouseout", "mouseleave", "mouseover", "mouseenter",
+        "mousemove", "mouseup",
+        "mouseout", "mouseleave"];
+  }
 
 async function runTestForDefaultEvent(preventDefaultEvent) {
     promise_test((test)=>
@@ -153,8 +92,8 @@ async function runTestForDefaultEvent(preventDefaultEvent) {
           if(eventToPreventDefault === 'none'){
             assert_true(arePointerEventsBeforeCompatMouseEvents(receivedEvents), "There are no compatible mouse events for all pointer events:" + receivedEvents);
           }
-          assert_array_equals(receivedPointerEvents, expectedPointerEvents.get(preventDefaultEvent));
-          assert_array_equals(receivedMouseEvents, expectedMouseEvents.get(preventDefaultEvent));
+          assert_array_equals(receivedPointerEvents, expectedPointerEvents());
+          assert_array_equals(receivedMouseEvents, expectedMouseEvents(preventDefaultEvent));
         });
         resolve();
     }), `Verifies the effect of pointer event prevent-default on ${preventDefaultEvent}`);
diff --git a/testing/web-platform/tests/pointerevents/pointerevent_support.js b/testing/web-platform/tests/pointerevents/pointerevent_support.js
index f3229b90b6a4..e8e9dd6642e3 100644
--- a/testing/web-platform/tests/pointerevents/pointerevent_support.js
+++ b/testing/web-platform/tests/pointerevents/pointerevent_support.js
@@ -1,14 +1,15 @@
 const All_Pointer_Events = [
-        "pointerdown",
-        "pointerup",
-        "pointercancel",
-        "pointermove",
-        "pointerover",
-        "pointerout",
-        "pointerenter",
-        "pointerleave",
-        "gotpointercapture",
-        "lostpointercapture"];
+  "pointerdown",
+  "pointerup",
+  "pointercancel",
+  "pointermove",
+  "pointerover",
+  "pointerout",
+  "pointerenter",
+  "pointerleave",
+  "gotpointercapture",
+  "lostpointercapture"
+];
 
 // https://w3c.github.io/pointerevents/#the-button-property
 // Values for the button property, which indicates the device button whose state
@@ -44,194 +45,194 @@ const ButtonsBitfield = {
 // Check for conformance to PointerEvent interface
 // https://w3c.github.io/pointerevents/#pointerevent-interface
 function check_PointerEvent(event, testNamePrefix) {
-    if (testNamePrefix === undefined)
-        testNamePrefix = "";
+  if (testNamePrefix === undefined)
+    testNamePrefix = "";
 
-    // Use expectedPointerType if set otherwise just use the incoming event pointerType in the test name.
-    var pointerTestName = (testNamePrefix ? testNamePrefix + ' ' : '')
-        + (expectedPointerType == null ? event.pointerType : expectedPointerType) + ' ' + event.type;
+  // Use expectedPointerType if set otherwise just use the incoming event pointerType in the test name.
+  var pointerTestName = (testNamePrefix ? testNamePrefix + ' ' : '')
+    + (expectedPointerType == null ? event.pointerType : expectedPointerType) + ' ' + event.type;
 
-    if (expectedPointerType != null) {
-        test(function () {
-            assert_equals(event.pointerType, expectedPointerType);
-        }, pointerTestName + ".pointerType is correct.");
+  if (expectedPointerType != null) {
+    test(function () {
+      assert_equals(event.pointerType, expectedPointerType);
+    }, pointerTestName + ".pointerType is correct.");
+  }
+
+  test(function () {
+    assert_true(event instanceof event.target.ownerDocument.defaultView.PointerEvent);
+  }, pointerTestName + " event is a PointerEvent event");
+
+
+  // Check attributes for conformance to WebIDL (existence, type, being readable).
+  var idl_type_check = {
+    "long": function (v) { return typeof v === "number" && Math.round(v) === v; },
+    "float": function (v) { return typeof v === "number"; },
+    "string": function (v) { return typeof v === "string"; },
+    "boolean": function (v) { return typeof v === "boolean" },
+    "object": function (v) { return typeof v === "object" }
+  };
+  [
+    ["long", "pointerId"],
+    ["float", "width"],
+    ["float", "height"],
+    ["float", "pressure"],
+    ["long", "tiltX"],
+    ["long", "tiltY"],
+    ["string", "pointerType"],
+    ["boolean", "isPrimary"],
+    ["long", "detail", 0],
+    ["object", "fromElement"],
+    ["object", "toElement"],
+    ["boolean", "isTrusted"],
+    ["boolean", "composed"],
+    ["boolean", "bubbles"]
+  ].forEach(function (attr) {
+    var type = attr[0];
+    var name = attr[1];
+
+    test(function () {
+      // Existence check.
+      assert_true(name in event, "attribute exists");
+
+      // Readonly check.
+      assert_readonly(event.type, name, "attribute is readonly");
+
+      // Type check.
+      assert_true(idl_type_check[type](event[name]),
+        "attribute type " + type + " (JS type was " + typeof event[name] + ")");
+    }, pointerTestName + "." + name + " conforms to WebIDL");
+  });
+
+  // Check values for inherited attributes.
+  // https://w3c.github.io/pointerevents/#attributes-and-default-actions
+  test(function () {
+    assert_equals(event.fromElement, null);
+  }, pointerTestName + ".fromElement value is null");
+  test(function () {
+    assert_equals(event.toElement, null);
+  }, pointerTestName + ".toElement value is null");
+  test(function () {
+    assert_equals(event.isTrusted, true);
+  }, pointerTestName + ".isTrusted value is true");
+  test(function () {
+    let expected = (event.type != 'pointerenter' && event.type != 'pointerleave');
+    assert_equals(event.composed, expected);
+  }, pointerTestName + ".composed value is valid");
+  test(function () {
+    let expected = (event.type != 'pointerenter' && event.type != 'pointerleave');
+    assert_equals(event.bubbles, expected);
+  }, pointerTestName + ".bubbles value is valid");
+
+  // Check the pressure value.
+  // https://w3c.github.io/pointerevents/#dom-pointerevent-pressure
+  test(function () {
+    assert_greater_than_equal(event.pressure, 0, "pressure is greater than or equal to 0");
+    assert_less_than_equal(event.pressure, 1, "pressure is less than or equal to 1");
+
+    if (event.buttons === 0) {
+      assert_equals(event.pressure, 0, "pressure is 0 with no buttons pressed");
+    } else {
+      assert_greater_than(event.pressure, 0, "pressure is greater than 0 with a button pressed");
+      if (event.pointerType === "mouse") {
+        assert_equals(event.pressure, 0.5, "pressure is 0.5 for mouse with a button pressed");
+      }
     }
+  }, pointerTestName + ".pressure value is valid");
 
+  // Check mouse-specific properties.
+  if (event.pointerType === "mouse") {
     test(function () {
-        assert_true(event instanceof event.target.ownerDocument.defaultView.PointerEvent);
-    }, pointerTestName + " event is a PointerEvent event");
+      assert_equals(event.width, 1, "width of mouse should be 1");
+      assert_equals(event.height, 1, "height of mouse should be 1");
+      assert_equals(event.tiltX, 0, event.type + ".tiltX is 0 for mouse");
+      assert_equals(event.tiltY, 0, event.type + ".tiltY is 0 for mouse");
+      assert_true(event.isPrimary, event.type + ".isPrimary is true for mouse");
+    }, pointerTestName + " properties for pointerType = mouse");
+  }
 
-
-    // Check attributes for conformance to WebIDL (existence, type, being readable).
-    var idl_type_check = {
-        "long": function (v) { return typeof v === "number" && Math.round(v) === v; },
-        "float": function (v) { return typeof v === "number"; },
-        "string": function (v) { return typeof v === "string"; },
-        "boolean": function (v) { return typeof v === "boolean" },
-        "object": function (v) { return typeof v === "object" }
-    };
-    [
-        ["long", "pointerId"],
-        ["float", "width"],
-        ["float", "height"],
-        ["float", "pressure"],
-        ["long", "tiltX"],
-        ["long", "tiltY"],
-        ["string", "pointerType"],
-        ["boolean", "isPrimary"],
-        ["long", "detail", 0],
-        ["object", "fromElement"],
-        ["object", "toElement"],
-        ["boolean", "isTrusted"],
-        ["boolean", "composed"],
-        ["boolean", "bubbles"]
-    ].forEach(function (attr) {
-        var type = attr[0];
-        var name = attr[1];
-
-        test(function () {
-            // Existence check.
-            assert_true(name in event, "attribute exists");
-
-            // Readonly check.
-            assert_readonly(event.type, name, "attribute is readonly");
-
-            // Type check.
-            assert_true(idl_type_check[type](event[name]),
-                "attribute type " + type + " (JS type was " + typeof event[name] + ")");
-        }, pointerTestName + "." + name + " conforms to WebIDL");
-    });
-
-    // Check values for inherited attributes.
-    // https://w3c.github.io/pointerevents/#attributes-and-default-actions
+  // Check "pointerup" specific properties.
+  if (event.type == "pointerup") {
     test(function () {
-        assert_equals(event.fromElement, null);
-    }, pointerTestName + ".fromElement value is null");
-    test(function () {
-        assert_equals(event.toElement, null);
-    }, pointerTestName + ".toElement value is null");
-    test(function () {
-        assert_equals(event.isTrusted, true);
-    }, pointerTestName + ".isTrusted value is true");
-    test(function () {
-        let expected = (event.type != 'pointerenter' && event.type != 'pointerleave');
-        assert_equals(event.composed, expected);
-    }, pointerTestName + ".composed value is valid");
-    test(function () {
-        let expected = (event.type != 'pointerenter' && event.type != 'pointerleave');
-        assert_equals(event.bubbles, expected);
-    }, pointerTestName + ".bubbles value is valid");
-
-    // Check the pressure value.
-    // https://w3c.github.io/pointerevents/#dom-pointerevent-pressure
-    test(function () {
-        assert_greater_than_equal(event.pressure, 0, "pressure is greater than or equal to 0");
-        assert_less_than_equal(event.pressure, 1, "pressure is less than or equal to 1");
-
-        if (event.buttons === 0) {
-            assert_equals(event.pressure, 0, "pressure is 0 with no buttons pressed");
-        } else {
-            assert_greater_than(event.pressure, 0, "pressure is greater than 0 with a button pressed");
-            if (event.pointerType === "mouse") {
-                assert_equals(event.pressure, 0.5, "pressure is 0.5 for mouse with a button pressed");
-            }
-        }
-    }, pointerTestName + ".pressure value is valid");
-
-    // Check mouse-specific properties.
-    if (event.pointerType === "mouse") {
-        test(function () {
-            assert_equals(event.width, 1, "width of mouse should be 1");
-            assert_equals(event.height, 1, "height of mouse should be 1");
-            assert_equals(event.tiltX, 0, event.type + ".tiltX is 0 for mouse");
-            assert_equals(event.tiltY, 0, event.type + ".tiltY is 0 for mouse");
-            assert_true(event.isPrimary, event.type + ".isPrimary is true for mouse");
-        }, pointerTestName + " properties for pointerType = mouse");
-    }
-
-    // Check "pointerup" specific properties.
-    if (event.type == "pointerup") {
-        test(function () {
-            assert_equals(event.width, 1, "width of pointerup should be 1");
-            assert_equals(event.height, 1, "height of pointerup should be 1");
-        }, pointerTestName + " properties for pointerup");
-    }
+      assert_equals(event.width, 1, "width of pointerup should be 1");
+      assert_equals(event.height, 1, "height of pointerup should be 1");
+    }, pointerTestName + " properties for pointerup");
+  }
 }
 
 function showPointerTypes() {
-    var complete_notice = document.getElementById("complete-notice");
-    var pointertype_log = document.getElementById("pointertype-log");
-    var pointertypes = Object.keys(detected_pointertypes);
-    pointertype_log.innerHTML = pointertypes.length ?
-        pointertypes.join(",") : "(none)";
-    complete_notice.style.display = "block";
+  var complete_notice = document.getElementById("complete-notice");
+  var pointertype_log = document.getElementById("pointertype-log");
+  var pointertypes = Object.keys(detected_pointertypes);
+  pointertype_log.innerHTML = pointertypes.length ?
+    pointertypes.join(",") : "(none)";
+  complete_notice.style.display = "block";
 }
 
 function showLoggedEvents() {
-    var event_log_elem = document.getElementById("event-log");
-    event_log_elem.innerHTML = event_log.length ? event_log.join(", ") : "(none)";
+  var event_log_elem = document.getElementById("event-log");
+  event_log_elem.innerHTML = event_log.length ? event_log.join(", ") : "(none)";
 
-    var complete_notice = document.getElementById("complete-notice");
-    complete_notice.style.display = "block";
+  var complete_notice = document.getElementById("complete-notice");
+  complete_notice.style.display = "block";
 }
 
 function failOnScroll() {
-    assert_true(false,
-    "scroll received while shouldn't");
+  assert_true(false,
+  "scroll received while shouldn't");
 }
 
 function updateDescriptionNextStep() {
-    document.getElementById('desc').innerHTML = "Test Description: Try to scroll text RIGHT.";
+  document.getElementById('desc').innerHTML = "Test Description: Try to scroll text RIGHT.";
 }
 
 function updateDescriptionComplete() {
-    document.getElementById('desc').innerHTML = "Test Description: Test complete";
+  document.getElementById('desc').innerHTML = "Test Description: Test complete";
 }
 
 function updateDescriptionSecondStepTouchActionElement(target, scrollReturnInterval) {
-    window.step_timeout(function() {
-    objectScroller(target, 'up', 0);}
-    , scrollReturnInterval);
-    document.getElementById('desc').innerHTML = "Test Description: Try to scroll element RIGHT moving your outside of the red border";
+  window.step_timeout(function() {
+  objectScroller(target, 'up', 0);}
+  , scrollReturnInterval);
+  document.getElementById('desc').innerHTML = "Test Description: Try to scroll element RIGHT moving your outside of the red border";
 }
 
 function updateDescriptionThirdStepTouchActionElement(target, scrollReturnInterval, callback = null) {
-    window.step_timeout(function() {
-        objectScroller(target, 'left', 0);
-        if (callback) {
-            callback();
-        }
-    }, scrollReturnInterval);
-    document.getElementById('desc').innerHTML = "Test Description: Try to scroll element DOWN then RIGHT starting your touch inside of the element. Then tap complete button";
+  window.step_timeout(function() {
+    objectScroller(target, 'left', 0);
+    if (callback) {
+      callback();
+    }
+  }, scrollReturnInterval);
+  document.getElementById('desc').innerHTML = "Test Description: Try to scroll element DOWN then RIGHT starting your touch inside of the element. Then tap complete button";
 }
 
 function updateDescriptionFourthStepTouchActionElement(target, scrollReturnInterval) {
-    document.getElementById('desc').innerHTML = "Test Description: Try to scroll element RIGHT starting your touch inside of the element";
+  document.getElementById('desc').innerHTML = "Test Description: Try to scroll element RIGHT starting your touch inside of the element";
 }
 
 function objectScroller(target, direction, value) {
-    if (direction == 'up') {
-        target.scrollTop = 0;
-    } else if (direction == 'left') {
-        target.scrollLeft = 0;
-    }
+  if (direction == 'up') {
+    target.scrollTop = 0;
+  } else if (direction == 'left') {
+    target.scrollLeft = 0;
+  }
 }
 
 function sPointerCapture(e) {
-    try {
-        target0.setPointerCapture(e.pointerId);
-    }
-    catch(e) {
-    }
+  try {
+    target0.setPointerCapture(e.pointerId);
+  }
+  catch(e) {
+  }
 }
 
 function rPointerCapture(e) {
-    try {
-        captureButton.value = 'Set Capture';
-        target0.releasePointerCapture(e.pointerId);
-    }
-    catch(e) {
-    }
+  try {
+    captureButton.value = 'Set Capture';
+    target0.releasePointerCapture(e.pointerId);
+  }
+  catch(e) {
+  }
 }
 
 var globalPointerEventTest = null;
@@ -239,192 +240,192 @@ var expectedPointerType = null;
 const ALL_POINTERS = ['mouse', 'touch', 'pen'];
 
 function MultiPointerTypeTest(testName, types) {
-    this.testName = testName;
-    this.types = types;
-    this.currentTypeIndex = 0;
-    this.currentTest = null;
-    this.createNextTest();
+  this.testName = testName;
+  this.types = types;
+  this.currentTypeIndex = 0;
+  this.currentTest = null;
+  this.createNextTest();
 }
 
 MultiPointerTypeTest.prototype.step = function(op) {
-    this.currentTest.step(op);
+  this.currentTest.step(op);
 }
 
 MultiPointerTypeTest.prototype.skip = function() {
-    var prevTest = this.currentTest;
-    this.createNextTest();
-    prevTest.timeout();
+  var prevTest = this.currentTest;
+  this.createNextTest();
+  prevTest.timeout();
 }
 
 MultiPointerTypeTest.prototype.done = function() {
-    if (this.currentTest.status != 1) {
-        var prevTest = this.currentTest;
-        this.createNextTest();
-        if (prevTest != null)
-            prevTest.done();
-    }
+  if (this.currentTest.status != 1) {
+    var prevTest = this.currentTest;
+    this.createNextTest();
+    if (prevTest != null)
+      prevTest.done();
+  }
 }
 
 MultiPointerTypeTest.prototype.step = function(stepFunction) {
-    this.currentTest.step(stepFunction);
+  this.currentTest.step(stepFunction);
 }
 
 MultiPointerTypeTest.prototype.createNextTest = function() {
-    if (this.currentTypeIndex < this.types.length) {
-        var pointerTypeDescription = document.getElementById('pointerTypeDescription');
-        document.getElementById('pointerTypeDescription').innerHTML = "Follow the test instructions with <span style='color: red'>" + this.types[this.currentTypeIndex] + "</span>. If you don't have the device <a href='javascript:;' onclick='globalPointerEventTest.skip()'>skip it</a>.";
-        this.currentTest = async_test(this.types[this.currentTypeIndex] + ' ' + this.testName);
-        expectedPointerType = this.types[this.currentTypeIndex];
-        this.currentTypeIndex++;
-    } else {
-        document.getElementById('pointerTypeDescription').innerHTML = "";
-    }
-    resetTestState();
+  if (this.currentTypeIndex < this.types.length) {
+    var pointerTypeDescription = document.getElementById('pointerTypeDescription');
+    document.getElementById('pointerTypeDescription').innerHTML = "Follow the test instructions with <span style='color: red'>" + this.types[this.currentTypeIndex] + "</span>. If you don't have the device <a href='javascript:;' onclick='globalPointerEventTest.skip()'>skip it</a>.";
+    this.currentTest = async_test(this.types[this.currentTypeIndex] + ' ' + this.testName);
+    expectedPointerType = this.types[this.currentTypeIndex];
+    this.currentTypeIndex++;
+  } else {
+    document.getElementById('pointerTypeDescription').innerHTML = "";
+  }
+  resetTestState();
 }
 
 function setup_pointerevent_test(testName, supportedPointerTypes) {
-    return globalPointerEventTest = new MultiPointerTypeTest(testName, supportedPointerTypes);
+  return globalPointerEventTest = new MultiPointerTypeTest(testName, supportedPointerTypes);
 }
 
 function checkPointerEventType(event) {
-    assert_equals(event.pointerType, expectedPointerType, "pointerType should be the same as the requested device.");
+  assert_equals(event.pointerType, expectedPointerType, "pointerType should be the same as the requested device.");
 }
 
 function touchScrollInTarget(target, direction) {
-    var x_delta = 0;
-    var y_delta = 0;
-    if (direction == "down") {
-        x_delta = 0;
-        y_delta = -10;
-    } else if (direction == "up") {
-        x_delta = 0;
-        y_delta = 10;
-    } else if (direction == "right") {
-        x_delta = -10;
-        y_delta = 0;
-    } else if (direction == "left") {
-        x_delta = 10;
-        y_delta = 0;
-    } else {
-        throw("scroll direction '" + direction + "' is not expected, direction should be 'down', 'up', 'left' or 'right'");
-    }
-    return new test_driver.Actions()
-                   .addPointer("touchPointer1", "touch")
-                   .pointerMove(0, 0, {origin: target})
-                   .pointerDown()
-                   .pointerMove(x_delta, y_delta, {origin: target})
-                   .pointerMove(2 * x_delta, 2 * y_delta, {origin: target})
-                   .pointerMove(3 * x_delta, 3 * y_delta, {origin: target})
-                   .pointerMove(4 * x_delta, 4 * y_delta, {origin: target})
-                   .pointerMove(5 * x_delta, 5 * y_delta, {origin: target})
-                   .pointerMove(6 * x_delta, 6 * y_delta, {origin: target})
-                   .pause(100)
-                   .pointerUp()
-                   .send();
+  var x_delta = 0;
+  var y_delta = 0;
+  if (direction == "down") {
+    x_delta = 0;
+    y_delta = -10;
+  } else if (direction == "up") {
+    x_delta = 0;
+    y_delta = 10;
+  } else if (direction == "right") {
+    x_delta = -10;
+    y_delta = 0;
+  } else if (direction == "left") {
+    x_delta = 10;
+    y_delta = 0;
+  } else {
+    throw("scroll direction '" + direction + "' is not expected, direction should be 'down', 'up', 'left' or 'right'");
+  }
+  return new test_driver.Actions()
+    .addPointer("touchPointer1", "touch")
+    .pointerMove(0, 0, {origin: target})
+    .pointerDown()
+    .pointerMove(x_delta, y_delta, {origin: target})
+    .pointerMove(2 * x_delta, 2 * y_delta, {origin: target})
+    .pointerMove(3 * x_delta, 3 * y_delta, {origin: target})
+    .pointerMove(4 * x_delta, 4 * y_delta, {origin: target})
+    .pointerMove(5 * x_delta, 5 * y_delta, {origin: target})
+    .pointerMove(6 * x_delta, 6 * y_delta, {origin: target})
+    .pause(100)
+    .pointerUp()
+    .send();
 }
 
 function clickInTarget(pointerType, target) {
-    var pointerId = pointerType + "Pointer1";
-    return new test_driver.Actions()
-                   .addPointer(pointerId, pointerType)
-                   .pointerMove(0, 0, {origin: target})
-                   .pointerDown()
-                   .pointerUp()
-                   .send();
+  var pointerId = pointerType + "Pointer1";
+  return new test_driver.Actions()
+    .addPointer(pointerId, pointerType)
+    .pointerMove(0, 0, {origin: target})
+    .pointerDown()
+    .pointerUp()
+    .send();
 }
 
 function rightClickInTarget(pointerType, target) {
-    let pointerId = pointerType + "Pointer1";
-    let actions = new test_driver.Actions();
-    return actions.addPointer(pointerId, pointerType)
-        .pointerMove(0, 0, {origin: target})
-        .pointerDown({button:actions.ButtonType.RIGHT})
-        .pointerUp({button:actions.ButtonType.RIGHT})
-        .send();
+  let pointerId = pointerType + "Pointer1";
+  let actions = new test_driver.Actions();
+  return actions.addPointer(pointerId, pointerType)
+    .pointerMove(0, 0, {origin: target})
+    .pointerDown({button:actions.ButtonType.RIGHT})
+    .pointerUp({button:actions.ButtonType.RIGHT})
+    .send();
 }
 
 function twoFingerDrag(target) {
   return new test_driver.Actions()
-      .addPointer("touchPointer1", "touch")
-      .addPointer("touchPointer2", "touch")
-      .pointerMove(0, 0, {origin: target, sourceName: "touchPointer1"})
-      .pointerMove(10, 0, {origin: target, sourceName: "touchPointer2"})
-      .pointerDown({sourceName: "touchPointer1"})
-      .pointerDown({sourceName: "touchPointer2"})
-      .pointerMove(0, 10, {origin: target, sourceName: "touchPointer1"})
-      .pointerMove(10, 10, {origin: target, sourceName: "touchPointer2"})
-      .pointerMove(0, 20, {origin: target, sourceName: "touchPointer1"})
-      .pointerMove(10, 20, {origin: target, sourceName: "touchPointer2"})
-      .pause(100)
-      .pointerUp({sourceName: "touchPointer1"})
-      .pointerUp({sourceName: "touchPointer2"})
-      .send();
+    .addPointer("touchPointer1", "touch")
+    .addPointer("touchPointer2", "touch")
+    .pointerMove(0, 0, { origin: target, sourceName: "touchPointer1" })
+    .pointerMove(10, 0, { origin: target, sourceName: "touchPointer2" })
+    .pointerDown({ sourceName: "touchPointer1" })
+    .pointerDown({ sourceName: "touchPointer2" })
+    .pointerMove(0, 10, { origin: target, sourceName: "touchPointer1" })
+    .pointerMove(10, 10, { origin: target, sourceName: "touchPointer2" })
+    .pointerMove(0, 20, { origin: target, sourceName: "touchPointer1" })
+    .pointerMove(10, 20, { origin: target, sourceName: "touchPointer2" })
+    .pause(100)
+    .pointerUp({ sourceName: "touchPointer1" })
+    .pointerUp({ sourceName: "touchPointer2" })
+    .send();
 }
 
 function pointerDragInTarget(pointerType, target, direction) {
-    var x_delta = 0;
-    var y_delta = 0;
-    if (direction == "down") {
-        x_delta = 0;
-        y_delta = 10;
-    } else if (direction == "up") {
-        x_delta = 0;
-        y_delta = -10;
-    } else if (direction == "right") {
-        x_delta = 10;
-        y_delta = 0;
-    } else if (direction == "left") {
-        x_delta = -10;
-        y_delta = 0;
-    } else {
-        throw("drag direction '" + direction + "' is not expected, direction should be 'down', 'up', 'left' or 'right'");
-    }
-    var pointerId = pointerType + "Pointer1";
-    return new test_driver.Actions()
-                   .addPointer(pointerId, pointerType)
-                   .pointerMove(0, 0, {origin: target})
-                   .pointerDown()
-                   .pointerMove(x_delta, y_delta, {origin: target})
-                   .pointerMove(2 * x_delta, 2 * y_delta, {origin: target})
-                   .pointerMove(3 * x_delta, 3 * y_delta, {origin: target})
-                   .pointerUp()
-                   .send();
+  var x_delta = 0;
+  var y_delta = 0;
+  if (direction == "down") {
+    x_delta = 0;
+    y_delta = 10;
+  } else if (direction == "up") {
+    x_delta = 0;
+    y_delta = -10;
+  } else if (direction == "right") {
+    x_delta = 10;
+    y_delta = 0;
+  } else if (direction == "left") {
+    x_delta = -10;
+    y_delta = 0;
+  } else {
+    throw("drag direction '" + direction + "' is not expected, direction should be 'down', 'up', 'left' or 'right'");
+  }
+  var pointerId = pointerType + "Pointer1";
+  return new test_driver.Actions()
+    .addPointer(pointerId, pointerType)
+    .pointerMove(0, 0, {origin: target})
+    .pointerDown()
+    .pointerMove(x_delta, y_delta, {origin: target})
+    .pointerMove(2 * x_delta, 2 * y_delta, {origin: target})
+    .pointerMove(3 * x_delta, 3 * y_delta, {origin: target})
+    .pointerUp()
+    .send();
 }
 
 function pointerHoverInTarget(pointerType, target, direction) {
-    var x_delta = 0;
-    var y_delta = 0;
-    if (direction == "down") {
-        x_delta = 0;
-        y_delta = 10;
-    } else if (direction == "up") {
-        x_delta = 0;
-        y_delta = -10;
-    } else if (direction == "right") {
-        x_delta = 10;
-        y_delta = 0;
-    } else if (direction == "left") {
-        x_delta = -10;
-        y_delta = 0;
-    } else {
-        throw("drag direction '" + direction + "' is not expected, direction should be 'down', 'up', 'left' or 'right'");
-    }
-    var pointerId = pointerType + "Pointer1";
-    return new test_driver.Actions()
-                   .addPointer(pointerId, pointerType)
-                   .pointerMove(0, 0, {origin: target})
-                   .pointerMove(x_delta, y_delta, {origin: target})
-                   .pointerMove(2 * x_delta, 2 * y_delta, {origin: target})
-                   .pointerMove(3 * x_delta, 3 * y_delta, {origin: target})
-                   .send();
+  var x_delta = 0;
+  var y_delta = 0;
+  if (direction == "down") {
+    x_delta = 0;
+    y_delta = 10;
+  } else if (direction == "up") {
+    x_delta = 0;
+    y_delta = -10;
+  } else if (direction == "right") {
+    x_delta = 10;
+    y_delta = 0;
+  } else if (direction == "left") {
+    x_delta = -10;
+    y_delta = 0;
+  } else {
+    throw("drag direction '" + direction + "' is not expected, direction should be 'down', 'up', 'left' or 'right'");
+  }
+  var pointerId = pointerType + "Pointer1";
+  return new test_driver.Actions()
+    .addPointer(pointerId, pointerType)
+    .pointerMove(0, 0, {origin: target})
+    .pointerMove(x_delta, y_delta, {origin: target})
+    .pointerMove(2 * x_delta, 2 * y_delta, {origin: target})
+    .pointerMove(3 * x_delta, 3 * y_delta, {origin: target})
+    .send();
 }
 
 function moveToDocument(pointerType) {
-    var pointerId = pointerType + "Pointer1";
-    return new test_driver.Actions()
-                   .addPointer(pointerId, pointerType)
-                   .pointerMove(0, 0)
-                   .send();
+  var pointerId = pointerType + "Pointer1";
+  return new test_driver.Actions()
+    .addPointer(pointerId, pointerType)
+    .pointerMove(0, 0)
+    .send();
 }
 
 // Returns a promise that only gets resolved when the condition is met.
@@ -441,61 +442,61 @@ function resolveWhen(condition) {
 }
 
 // Returns a promise that only gets resolved after n animation frames
-function waitForAnimationFrames(n){
+function waitForAnimationFrames(n) {
   let p = 0;
-  function next(){
+  function next() {
     p++;
     return p === n;
   }
   return resolveWhen(next);
 }
 
-function isPointerEvent(eventName){
+function isPointerEvent(eventName) {
   return All_Pointer_Events.includes(eventName);
 }
 
-function isMouseEvent(eventName){
+function isMouseEvent(eventName) {
   return ["mousedown", "mouseup", "mousemove", "mouseover",
-          "mouseenter", "mouseout", "mouseleave",
-          "click", "contextmenu", "dblclick"
-         ].includes(eventName);
+    "mouseenter", "mouseout", "mouseleave",
+    "click", "contextmenu", "dblclick"
+  ].includes(eventName);
 }
 
-function arePointerAndMouseEventCompatible(pointerEventName, mouseEventName){
-  // e.g. compatible pointer-mouse events: pointerup - mouseup etc
-  return pointerEventName.startsWith("pointer") &&
-         mouseEventName.startsWith("mouse") &&
-         pointerEventName.substring(7) === mouseEventName.substring(5);
-}
+// Events is a list of events fired at a target.
+//
+// Checks to see if each pointer event has a corresponding mouse event in the
+// event array and the two events are in the proper order (pointer event is
+// first).
+//
+// See https://w3c.github.io/pointerevents/#mapping-for-devices-that-support-hover
+function arePointerEventsBeforeCompatMouseEvents(events) {
+  function arePointerAndMouseEventCompatible(pointerEventName, mouseEventName) {
+    return pointerEventName.startsWith("pointer")
+      && mouseEventName.startsWith("mouse")
+      && pointerEventName.substring(7) === mouseEventName.substring(5);
+  }
 
-// events is a list of events fired at a target
-// checks to see if each pointer event has a corresponding mouse event in the event array
-// and the two events are in the proper order (pointer event is first)
-// see https://www.w3.org/TR/pointerevents3/#mapping-for-devices-that-support-hover
-function arePointerEventsBeforeCompatMouseEvents(events){
-  // checks to see if the pointer event is compatible with the mouse event
-  // and the pointer event happens before the mouse event
-  function arePointerAndMouseEventInProperOrder(pointerEventIndex, mouseEventIndex, events){
+  function arePointerAndMouseEventInProperOrder(pointerEventIndex, mouseEventIndex, events) {
     return (pointerEventIndex < mouseEventIndex && isPointerEvent(events[pointerEventIndex]) && isMouseEvent(events[mouseEventIndex])
       && arePointerAndMouseEventCompatible(events[pointerEventIndex], events[mouseEventIndex]));
   }
 
-  let currentPointerEventIndex = events.findIndex((event)=>isPointerEvent(event));
-  let currentMouseEventIndex = events.findIndex((event)=>isMouseEvent(event));
+  let currentPointerEventIndex = events.findIndex((event) => isPointerEvent(event));
+  let currentMouseEventIndex = events.findIndex((event) => isMouseEvent(event));
 
-  while(1){
-    if(currentMouseEventIndex < 0 && currentPointerEventIndex < 0)
+  while (1) {
+    if (currentMouseEventIndex < 0 && currentPointerEventIndex < 0)
       return true;
-    if(currentMouseEventIndex < 0 || currentPointerEventIndex < 0)
+    if (currentMouseEventIndex < 0 || currentPointerEventIndex < 0)
       return false;
-    if(!arePointerAndMouseEventInProperOrder(currentPointerEventIndex, currentMouseEventIndex, events))
+    if (!arePointerAndMouseEventInProperOrder(currentPointerEventIndex, currentMouseEventIndex, events))
       return false;
 
-    let pointerIdx = events.slice(currentPointerEventIndex+1).findIndex(isPointerEvent);
-    let mouseIdx = events.slice(currentMouseEventIndex+1).findIndex(isMouseEvent);
+    let pointerIdx = events.slice(currentPointerEventIndex + 1).findIndex(isPointerEvent);
+    let mouseIdx = events.slice(currentMouseEventIndex + 1).findIndex(isMouseEvent);
 
-    currentPointerEventIndex = (pointerIdx < 0)?pointerIdx:(currentPointerEventIndex+1+pointerIdx);
-    currentMouseEventIndex = (mouseIdx < 0)?mouseIdx:(currentMouseEventIndex+1+mouseIdx);
+    currentPointerEventIndex = (pointerIdx < 0) ? pointerIdx : (currentPointerEventIndex + 1 + pointerIdx);
+    currentMouseEventIndex = (mouseIdx < 0) ? mouseIdx : (currentMouseEventIndex + 1 + mouseIdx);
   }
 
   return true;
@@ -505,7 +506,7 @@ function arePointerEventsBeforeCompatMouseEvents(events){
 // receives an event of type |event_type|.
 function getEvent(event_type, target) {
   return new Promise(resolve => {
-    target.addEventListener(event_type, e => resolve(e), {once: true});
+    target.addEventListener(event_type, e => resolve(e), { once: true });
   });
 }
 
@@ -528,8 +529,8 @@ function preventDefaultPointerdownOnce(target) {
   return new Promise(
     (resolve) => {
       target.addEventListener("pointerdown", (event) => {
-                                event.preventDefault();
-                                resolve();
-                              }, {once: true});
+        event.preventDefault();
+        resolve();
+      }, { once: true });
     });
 }