diff --git a/packages/ncform-e2e/ncform/cypress/integration/examples/required.js b/packages/ncform-e2e/ncform/cypress/integration/examples/required.js
new file mode 100644
index 0000000..c71fd9d
--- /dev/null
+++ b/packages/ncform-e2e/ncform/cypress/integration/examples/required.js
@@ -0,0 +1,124 @@
+/// <reference types="Cypress" />
+
+const md5 = require('blueimp-md5');
+
+context('required', () => {
+
+  before(() => {
+    cy.visit('http://localhost:3000/examples/components/vue-ncform/_required.html')
+  })
+
+  it('Specify true value', () => {
+    let id = md5('Specify true value');
+    cy.get(`[data-cy=${id}]`).within(() => {
+      // object
+      cy.get('legend').contains('user').next().as('user');
+      cy.get('@user').find('label:contains("name")').contains('*').should('be.visible');
+      cy.get('@user').find('input').type('daniel').clear()
+      cy.get('@user').find('.invalid-feedback').should('be.visible');
+
+      // array
+      cy.get('legend').contains('users1').next().as('users1');
+      cy.get('@users1').find('label:contains("firstname")').contains('*').should('be.visible');
+      cy.get('@users1').find('input').type('daniel').clear()
+      cy.get('@users1').find('.invalid-feedback').should('be.visible');
+
+      // array-table
+      cy.get('legend').contains('users2').next().as('users2');
+      cy.get('@users2').find('th:contains("users2")').contains('*').should('be.visible');
+      cy.get('@users2').find('input').type('daniel').clear()
+      cy.get('@users2').find('.invalid-feedback').should('be.visible');
+    })
+  })
+
+  it('Object: Specify dx value', () => {
+    let id = md5('Object: Specify dx value');
+    cy.get(`[data-cy=${id}]`).within(() => {
+      cy.get('label').contains('age').parent().as('age');
+      cy.get('label').contains('firstname').parent().as('firstname');
+      cy.get('label').contains('lastname').parent().as('lastname');
+
+      cy.get('@firstname').find('label').should('not.contain', '*');
+      cy.get('@lastname').find('label').should('not.contain', '*');
+
+      cy.get('@age').find('input').type(19);
+      cy.get('@firstname').find('label').should('contain', '*');
+      cy.get('@lastname').find('label').should('contain', '*');
+
+      cy.get('@age').find('input').clear().type(10);
+      cy.get('@firstname').find('label').should('not.contain', '*');
+      cy.get('@lastname').find('label').should('not.contain', '*');
+    })
+  })
+
+  it('Array: Specify dx value', () => {
+    let id = md5('Array: Specify dx value');
+    cy.get(`[data-cy=${id}]`).within(() => {
+      cy.get('label').contains('age').parent().as('age');
+      cy.get('legend').contains('users').parent().as('users');
+      cy.get('legend').contains('users1').parent().as('users1');
+
+      // users
+      cy.get('@users').find('button').contains('增加').click();
+      cy.get('@users').find('label:contains("name")').should('not.contain', '*');
+
+      cy.get('@age').find('input').type(19);
+      cy.get('@users').find('label:contains("name")').should('contain', '*');
+
+      cy.get('@age').find('input').clear().type(10);
+      cy.get('@users').find('label:contains("name")').should('not.contain', '*');
+
+      // users1
+      cy.get('@users1').find('button').contains('增加').click();
+      cy.get('@users1').find('label:contains("users1")').each($item => {
+        cy.wrap($item).parent().find('label').contains('age').next().find('input').as('ageInput');
+        cy.wrap($item).parent().find('label').contains('name').as('nameLabel');
+
+        cy.get('@ageInput').type(19)
+        cy.get('@nameLabel').should('contain', '*');
+        cy.get('@ageInput').clear().type(11)
+        cy.get('@nameLabel').should('not.contain', '*');
+      })
+    })
+  })
+
+  it.only('Table: Specify dx value', () => {
+    let id = md5('Table: Specify dx value');
+    cy.get(`[data-cy=${id}]`).within(() => {
+      cy.get('label').contains('age').parent().as('age');
+      cy.get('legend').contains('users').parent().as('users');
+      cy.get('legend').contains('users1').parent().as('users1');
+
+      // users
+      cy.get('@users').find('button').contains('增加').click();
+      cy.get('@users').find('th:contains("name")').should('not.contain', '*');
+
+      cy.get('@age').find('input').type(19);
+      cy.get('@users').find('th:contains("name")').should('contain', '*');
+
+      cy.get('@age').find('input').clear().type(10);
+      cy.get('@users').find('th:contains("name")').should('not.contain', '*');
+
+      // users1
+      cy.get('@users1').find('button').contains('增加').click();
+      cy.get('@users1').find('tbody tr').each($item => {
+        cy.wrap($item).find('input').eq(0).as('ageInput');
+        cy.wrap($item).find('input').eq(1).as('nameInput');
+
+        cy.get('@nameInput').type('daniel').clear();
+        cy.get('@nameInput').next('.invalid-feedback').should('not.be.visible');
+
+        cy.get('@ageInput').type(19)
+        cy.get('@nameInput').next('.invalid-feedback').should('be.visible');
+        cy.get('@nameInput').type('daniel').clear();
+        cy.get('@nameInput').next('.invalid-feedback').should('be.visible');
+
+        cy.get('@ageInput').clear().type(11)
+        cy.get('@nameInput').next('.invalid-feedback').should('not.be.visible');
+        cy.get('@nameInput').type('daniel').clear();
+        cy.get('@nameInput').next('.invalid-feedback').should('not.be.visible');
+      })
+    })
+  })
+
+})
diff --git a/packages/ncform-e2e/package-lock.json b/packages/ncform-e2e/package-lock.json
index 661f3ce..c4d4e66 100644
--- a/packages/ncform-e2e/package-lock.json
+++ b/packages/ncform-e2e/package-lock.json
@@ -10,10 +10,10 @@
       "integrity": "sha1-p3SS9LEdzHxEajSz4ochr9M8ZCo=",
       "dev": true,
       "requires": {
-        "chalk": "^1.1.3",
-        "cli-cursor": "^1.0.2",
-        "date-fns": "^1.27.2",
-        "figures": "^1.7.0"
+        "chalk": "1.1.3",
+        "cli-cursor": "1.0.2",
+        "date-fns": "1.30.1",
+        "figures": "1.7.0"
       },
       "dependencies": {
         "chalk": {
@@ -22,11 +22,11 @@
           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
           "dev": true,
           "requires": {
-            "ansi-styles": "^2.2.1",
-            "escape-string-regexp": "^1.0.2",
-            "has-ansi": "^2.0.0",
-            "strip-ansi": "^3.0.0",
-            "supports-color": "^2.0.0"
+            "ansi-styles": "2.2.1",
+            "escape-string-regexp": "1.0.5",
+            "has-ansi": "2.0.0",
+            "strip-ansi": "3.0.1",
+            "supports-color": "2.0.0"
           }
         },
         "supports-color": {
@@ -43,8 +43,8 @@
       "integrity": "sha512-yYrK+/bgL3hwoRHMZG4r5fyLniCy1pXex5fimtewAY6vE/jsVs8Q37UsEO03tFlcmiLnQ3rBNMaZBYTi/+C1cw==",
       "dev": true,
       "requires": {
-        "debug": "^3.1.0",
-        "lodash.once": "^4.1.1"
+        "debug": "3.1.0",
+        "lodash.once": "4.1.1"
       }
     },
     "@types/blob-util": {
@@ -71,8 +71,8 @@
       "integrity": "sha512-7aIt9QMRdxuagLLI48dPz96YJdhu64p6FCa6n4qkGN5DQLHnrIjZpD9bXCvV2G0NwgZ1FAmfP214dxc5zNCfgQ==",
       "dev": true,
       "requires": {
-        "@types/chai": "*",
-        "@types/jquery": "*"
+        "@types/chai": "4.0.8",
+        "@types/jquery": "3.3.6"
       }
     },
     "@types/jquery": {
@@ -111,8 +111,8 @@
       "integrity": "sha512-5zSs2AslzyPZdOsbm2NRtuSNAI2aTWzNKOHa/GRecKo7a5efYD7qGcPxMZXQDayVXT2Vnd5waXxBvV31eCZqiA==",
       "dev": true,
       "requires": {
-        "@types/chai": "*",
-        "@types/sinon": "*"
+        "@types/chai": "4.0.8",
+        "@types/sinon": "7.0.0"
       }
     },
     "ajv": {
@@ -121,10 +121,10 @@
       "integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
       "dev": true,
       "requires": {
-        "co": "^4.6.0",
-        "fast-deep-equal": "^1.0.0",
-        "fast-json-stable-stringify": "^2.0.0",
-        "json-schema-traverse": "^0.3.0"
+        "co": "4.6.0",
+        "fast-deep-equal": "1.1.0",
+        "fast-json-stable-stringify": "2.0.0",
+        "json-schema-traverse": "0.3.1"
       }
     },
     "ansi-escapes": {
@@ -151,7 +151,7 @@
       "integrity": "sha512-jxwzQpLQjSmWXgwaCZE9Nz+glAG01yF1QnWgbhGwHI5A6FRIEY6IVqtHhIepHqI7/kyEyQEagBC5mBEFlIYvdg==",
       "dev": true,
       "requires": {
-        "safer-buffer": "~2.1.0"
+        "safer-buffer": "2.1.2"
       }
     },
     "assert-plus": {
@@ -166,7 +166,7 @@
       "integrity": "sha1-SZAgDxjqW4N8LMT4wDGmmFw4VhE=",
       "dev": true,
       "requires": {
-        "lodash": "^4.14.0"
+        "lodash": "4.17.11"
       }
     },
     "asynckit": {
@@ -193,9 +193,9 @@
       "integrity": "sha1-Y/1D99weO7fONZR9uP42mj9Yx0s=",
       "dev": true,
       "requires": {
-        "chalk": "^1.1.3",
-        "esutils": "^2.0.2",
-        "js-tokens": "^3.0.2"
+        "chalk": "1.1.3",
+        "esutils": "2.0.2",
+        "js-tokens": "3.0.2"
       },
       "dependencies": {
         "chalk": {
@@ -204,11 +204,11 @@
           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
           "dev": true,
           "requires": {
-            "ansi-styles": "^2.2.1",
-            "escape-string-regexp": "^1.0.2",
-            "has-ansi": "^2.0.0",
-            "strip-ansi": "^3.0.0",
-            "supports-color": "^2.0.0"
+            "ansi-styles": "2.2.1",
+            "escape-string-regexp": "1.0.5",
+            "has-ansi": "2.0.0",
+            "strip-ansi": "3.0.1",
+            "supports-color": "2.0.0"
           }
         },
         "supports-color": {
@@ -225,25 +225,25 @@
       "integrity": "sha512-6jyFLuDmeidKmUEb3NM+/yawG0M2bDZ9Z1qbZP59cyHLz8kYGKYwpJP0UwUKKUiTRNvxfLesJnTedqczP7cTDA==",
       "dev": true,
       "requires": {
-        "babel-code-frame": "^6.26.0",
-        "babel-generator": "^6.26.0",
-        "babel-helpers": "^6.24.1",
-        "babel-messages": "^6.23.0",
-        "babel-register": "^6.26.0",
-        "babel-runtime": "^6.26.0",
-        "babel-template": "^6.26.0",
-        "babel-traverse": "^6.26.0",
-        "babel-types": "^6.26.0",
-        "babylon": "^6.18.0",
-        "convert-source-map": "^1.5.1",
-        "debug": "^2.6.9",
-        "json5": "^0.5.1",
-        "lodash": "^4.17.4",
-        "minimatch": "^3.0.4",
-        "path-is-absolute": "^1.0.1",
-        "private": "^0.1.8",
-        "slash": "^1.0.0",
-        "source-map": "^0.5.7"
+        "babel-code-frame": "6.26.0",
+        "babel-generator": "6.26.1",
+        "babel-helpers": "6.24.1",
+        "babel-messages": "6.23.0",
+        "babel-register": "6.26.0",
+        "babel-runtime": "6.26.0",
+        "babel-template": "6.26.0",
+        "babel-traverse": "6.26.0",
+        "babel-types": "6.26.0",
+        "babylon": "6.18.0",
+        "convert-source-map": "1.6.0",
+        "debug": "2.6.9",
+        "json5": "0.5.1",
+        "lodash": "4.17.11",
+        "minimatch": "3.0.4",
+        "path-is-absolute": "1.0.1",
+        "private": "0.1.8",
+        "slash": "1.0.0",
+        "source-map": "0.5.7"
       },
       "dependencies": {
         "debug": {
@@ -263,14 +263,14 @@
       "integrity": "sha512-HyfwY6ApZj7BYTcJURpM5tznulaBvyio7/0d4zFOeMPUmfxkCjHocCuoLa2SAGzBI8AREcH3eP3758F672DppA==",
       "dev": true,
       "requires": {
-        "babel-messages": "^6.23.0",
-        "babel-runtime": "^6.26.0",
-        "babel-types": "^6.26.0",
-        "detect-indent": "^4.0.0",
-        "jsesc": "^1.3.0",
-        "lodash": "^4.17.4",
-        "source-map": "^0.5.7",
-        "trim-right": "^1.0.1"
+        "babel-messages": "6.23.0",
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0",
+        "detect-indent": "4.0.0",
+        "jsesc": "1.3.0",
+        "lodash": "4.17.11",
+        "source-map": "0.5.7",
+        "trim-right": "1.0.1"
       },
       "dependencies": {
         "jsesc": {
@@ -287,9 +287,9 @@
       "integrity": "sha1-FMGeXxQte0fxmlJDHlKxzLxAozA=",
       "dev": true,
       "requires": {
-        "babel-runtime": "^6.22.0",
-        "babel-traverse": "^6.24.1",
-        "babel-types": "^6.24.1"
+        "babel-runtime": "6.26.0",
+        "babel-traverse": "6.26.0",
+        "babel-types": "6.26.0"
       }
     },
     "babel-helper-builder-binary-assignment-operator-visitor": {
@@ -298,9 +298,9 @@
       "integrity": "sha1-zORReto1b0IgvK6KAsKzRvmlZmQ=",
       "dev": true,
       "requires": {
-        "babel-helper-explode-assignable-expression": "^6.24.1",
-        "babel-runtime": "^6.22.0",
-        "babel-types": "^6.24.1"
+        "babel-helper-explode-assignable-expression": "6.24.1",
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0"
       }
     },
     "babel-helper-call-delegate": {
@@ -309,10 +309,10 @@
       "integrity": "sha1-7Oaqzdx25Bw0YfiL/Fdb0Nqi340=",
       "dev": true,
       "requires": {
-        "babel-helper-hoist-variables": "^6.24.1",
-        "babel-runtime": "^6.22.0",
-        "babel-traverse": "^6.24.1",
-        "babel-types": "^6.24.1"
+        "babel-helper-hoist-variables": "6.24.1",
+        "babel-runtime": "6.26.0",
+        "babel-traverse": "6.26.0",
+        "babel-types": "6.26.0"
       }
     },
     "babel-helper-define-map": {
@@ -321,10 +321,10 @@
       "integrity": "sha1-pfVtq0GiX5fstJjH66ypgZ+Vvl8=",
       "dev": true,
       "requires": {
-        "babel-helper-function-name": "^6.24.1",
-        "babel-runtime": "^6.26.0",
-        "babel-types": "^6.26.0",
-        "lodash": "^4.17.4"
+        "babel-helper-function-name": "6.24.1",
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0",
+        "lodash": "4.17.11"
       }
     },
     "babel-helper-explode-assignable-expression": {
@@ -333,9 +333,9 @@
       "integrity": "sha1-8luCz33BBDPFX3BZLVdGQArCLKo=",
       "dev": true,
       "requires": {
-        "babel-runtime": "^6.22.0",
-        "babel-traverse": "^6.24.1",
-        "babel-types": "^6.24.1"
+        "babel-runtime": "6.26.0",
+        "babel-traverse": "6.26.0",
+        "babel-types": "6.26.0"
       }
     },
     "babel-helper-explode-class": {
@@ -344,10 +344,10 @@
       "integrity": "sha1-fcKjkQ3uAHBW4eMdZAztPVTqqes=",
       "dev": true,
       "requires": {
-        "babel-helper-bindify-decorators": "^6.24.1",
-        "babel-runtime": "^6.22.0",
-        "babel-traverse": "^6.24.1",
-        "babel-types": "^6.24.1"
+        "babel-helper-bindify-decorators": "6.24.1",
+        "babel-runtime": "6.26.0",
+        "babel-traverse": "6.26.0",
+        "babel-types": "6.26.0"
       }
     },
     "babel-helper-function-name": {
@@ -356,11 +356,11 @@
       "integrity": "sha1-00dbjAPtmCQqJbSDUasYOZ01gKk=",
       "dev": true,
       "requires": {
-        "babel-helper-get-function-arity": "^6.24.1",
-        "babel-runtime": "^6.22.0",
-        "babel-template": "^6.24.1",
-        "babel-traverse": "^6.24.1",
-        "babel-types": "^6.24.1"
+        "babel-helper-get-function-arity": "6.24.1",
+        "babel-runtime": "6.26.0",
+        "babel-template": "6.26.0",
+        "babel-traverse": "6.26.0",
+        "babel-types": "6.26.0"
       }
     },
     "babel-helper-get-function-arity": {
@@ -369,8 +369,8 @@
       "integrity": "sha1-j3eCqpNAfEHTqlCQj4mwMbG2hT0=",
       "dev": true,
       "requires": {
-        "babel-runtime": "^6.22.0",
-        "babel-types": "^6.24.1"
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0"
       }
     },
     "babel-helper-hoist-variables": {
@@ -379,8 +379,8 @@
       "integrity": "sha1-HssnaJydJVE+rbyZFKc/VAi+enY=",
       "dev": true,
       "requires": {
-        "babel-runtime": "^6.22.0",
-        "babel-types": "^6.24.1"
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0"
       }
     },
     "babel-helper-optimise-call-expression": {
@@ -389,8 +389,8 @@
       "integrity": "sha1-96E0J7qfc/j0+pk8VKl4gtEkQlc=",
       "dev": true,
       "requires": {
-        "babel-runtime": "^6.22.0",
-        "babel-types": "^6.24.1"
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0"
       }
     },
     "babel-helper-regex": {
@@ -399,9 +399,9 @@
       "integrity": "sha1-MlxZ+QL4LyS3T6zu0DY5VPZJXnI=",
       "dev": true,
       "requires": {
-        "babel-runtime": "^6.26.0",
-        "babel-types": "^6.26.0",
-        "lodash": "^4.17.4"
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0",
+        "lodash": "4.17.11"
       }
     },
     "babel-helper-remap-async-to-generator": {
@@ -410,11 +410,11 @@
       "integrity": "sha1-XsWBgnrXI/7N04HxySg5BnbkVRs=",
       "dev": true,
       "requires": {
-        "babel-helper-function-name": "^6.24.1",
-        "babel-runtime": "^6.22.0",
-        "babel-template": "^6.24.1",
-        "babel-traverse": "^6.24.1",
-        "babel-types": "^6.24.1"
+        "babel-helper-function-name": "6.24.1",
+        "babel-runtime": "6.26.0",
+        "babel-template": "6.26.0",
+        "babel-traverse": "6.26.0",
+        "babel-types": "6.26.0"
       }
     },
     "babel-helper-replace-supers": {
@@ -423,12 +423,12 @@
       "integrity": "sha1-v22/5Dk40XNpohPKiov3S2qQqxo=",
       "dev": true,
       "requires": {
-        "babel-helper-optimise-call-expression": "^6.24.1",
-        "babel-messages": "^6.23.0",
-        "babel-runtime": "^6.22.0",
-        "babel-template": "^6.24.1",
-        "babel-traverse": "^6.24.1",
-        "babel-types": "^6.24.1"
+        "babel-helper-optimise-call-expression": "6.24.1",
+        "babel-messages": "6.23.0",
+        "babel-runtime": "6.26.0",
+        "babel-template": "6.26.0",
+        "babel-traverse": "6.26.0",
+        "babel-types": "6.26.0"
       }
     },
     "babel-helpers": {
@@ -437,8 +437,8 @@
       "integrity": "sha1-NHHenK7DiOXIUOWX5Yom3fN2ArI=",
       "dev": true,
       "requires": {
-        "babel-runtime": "^6.22.0",
-        "babel-template": "^6.24.1"
+        "babel-runtime": "6.26.0",
+        "babel-template": "6.26.0"
       }
     },
     "babel-messages": {
@@ -447,7 +447,7 @@
       "integrity": "sha1-8830cDhYA1sqKVHG7F7fbGLyYw4=",
       "dev": true,
       "requires": {
-        "babel-runtime": "^6.22.0"
+        "babel-runtime": "6.26.0"
       }
     },
     "babel-plugin-check-es2015-constants": {
@@ -456,7 +456,7 @@
       "integrity": "sha1-NRV7EBQm/S/9PaP3XH0ekYNbv4o=",
       "dev": true,
       "requires": {
-        "babel-runtime": "^6.22.0"
+        "babel-runtime": "6.26.0"
       }
     },
     "babel-plugin-syntax-async-functions": {
@@ -537,9 +537,9 @@
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+        "ajv": "5.5.2",
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@@ -1723,7 +1723,7 @@
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-        "follow-redirects": "^1.0.0",
-        "requires-port": "^1.0.0"
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@@ -1766,13 +1766,13 @@
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-        "portfinder": "^1.0.13",
-        "union": "~0.4.3"
+        "corser": "2.0.1",
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@@ -1801,8 +1801,8 @@
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+        "once": "1.4.0",
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     },
     "strip-eof": {
@@ -2737,7 +2737,7 @@
       "integrity": "sha512-Ry0AwkoKjDpVKK4sV4h6o3UJmNRbjYm2uXhwfj3J56lMVdvnUNqzQVRztOOMGQ++w1K/TjNDFvpJk0F/LoeBCQ==",
       "dev": true,
       "requires": {
-        "has-flag": "^2.0.0"
+        "has-flag": "2.0.0"
       },
       "dependencies": {
         "has-flag": {
@@ -2766,7 +2766,7 @@
       "integrity": "sha1-jzirlDjhcxXl29izZX6L+yd65Kc=",
       "dev": true,
       "requires": {
-        "os-tmpdir": "~1.0.1"
+        "os-tmpdir": "1.0.2"
       }
     },
     "to-fast-properties": {
@@ -2781,7 +2781,7 @@
       "integrity": "sha512-TZ6TTfI5NtZnuyy/Kecv+CnoROnyXn2DN97LontgQpCwsX2XyLYCC0ENhYkehSOwAp8rTQKc/NUIF7BkQ5rKLA==",
       "dev": true,
       "requires": {
-        "punycode": "^1.4.1"
+        "punycode": "1.4.1"
       }
     },
     "trim-right": {
@@ -2796,7 +2796,7 @@
       "integrity": "sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=",
       "dev": true,
       "requires": {
-        "safe-buffer": "^5.0.1"
+        "safe-buffer": "5.1.2"
       }
     },
     "tweetnacl": {
@@ -2817,7 +2817,7 @@
       "integrity": "sha1-GY+9rrolTniLDvy2MLwR8kopWeA=",
       "dev": true,
       "requires": {
-        "qs": "~2.3.3"
+        "qs": "2.3.3"
       },
       "dependencies": {
         "qs": {
@@ -2876,9 +2876,9 @@
       "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
       "dev": true,
       "requires": {
-        "assert-plus": "^1.0.0",
+        "assert-plus": "1.0.0",
         "core-util-is": "1.0.2",
-        "extsprintf": "^1.2.0"
+        "extsprintf": "1.3.0"
       }
     },
     "which": {
@@ -2887,7 +2887,7 @@
       "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
       "dev": true,
       "requires": {
-        "isexe": "^2.0.0"
+        "isexe": "2.0.0"
       }
     },
     "wordwrap": {
@@ -2914,8 +2914,8 @@
       "integrity": "sha1-eUUK/yKyqcWkHvVOAtuQfM+/nuI=",
       "dev": true,
       "requires": {
-        "buffer-crc32": "~0.2.3",
-        "fd-slicer": "~1.0.1"
+        "buffer-crc32": "0.2.13",
+        "fd-slicer": "1.0.1"
       }
     }
   }
diff --git a/packages/ncform/examples/components/vue-ncform/_required.html b/packages/ncform/examples/components/vue-ncform/_required.html
new file mode 100644
index 0000000..9ea26f2
--- /dev/null
+++ b/packages/ncform/examples/components/vue-ncform/_required.html
@@ -0,0 +1,269 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <title>vue-ncform Example</title>
+
+    <link rel="stylesheet" href="../../../node_modules/bootstrap/dist/css/bootstrap.min.css" />
+  </head>
+
+  <body>
+    <div id="demo" class="container">
+      <template v-for="item in formSchemas">
+        <div :data-cy="item.id" v-if="mode !== 'only' || item.only" :key="item.formName">
+          <h4>[CASE] {{ item.title }}</h4>
+          <ncform :form-schema="item.formSchema" v-model="item.formSchema.value" :form-name="item.formName"></ncform>
+          <hr />
+        </div>
+      </template>
+    </div>
+
+    <script type="text/javascript" src="../../../node_modules/vue/dist/vue.js"></script>
+    <script type="text/javascript" src="https://unpkg.com/blueimp-md5@2.10.0/js/md5.js"></script>
+    <script type="text/javascript" src="../../../node_modules/@ncform/ncform-common/dist/ncformCommon.min.js"></script>
+    <script type="text/javascript" src="../../../dist/vueNcform.js"></script>
+    <script type="text/javascript">
+      Vue.use(vueNcform);
+
+      new Vue({
+        el: '#demo',
+        data: {
+          mode: 'all', // all or only. if only mode, only objects with only:true in formSchemas are valid
+          formSchemas: [
+            {
+              id: md5('Specify true value'),
+              title: 'Specify true value',
+              formName: 'form_' + Math.random(),
+              formSchema: {
+                type: 'object',
+                properties: {
+                  user: {
+                    type: 'object',
+                    properties: {
+                      name: {
+                        type: 'string',
+                        rules: {
+                          required: true
+                        }
+                      }
+                    }
+                  },
+                  users1: {
+                    type: 'array',
+                    items: {
+                      type: 'object',
+                      properties: {
+                        firstname: {
+                          type: 'string',
+                          rules: {
+                            required: {
+                              value: true
+                            }
+                          }
+                        }
+                      }
+                    }
+                  },
+                  users2: {
+                    type: 'array',
+                    items: {
+                      type: 'string',
+                      rules: {
+                        required: {
+                          value: true
+                        }
+                      }
+                    },
+                    ui: {
+                      widget: 'array-table'
+                    }
+                  }
+                }
+              }
+            },
+            {
+              id: md5('Object: Specify dx value'),
+              title: 'Object: Specify dx value',
+              formName: 'form_' + Math.random(),
+              formSchema: {
+                type: 'object',
+                properties: {
+                  age: {
+                    type: 'number',
+                    ui: {
+                      columns: 4
+                    }
+                  },
+                  firstname: {
+                    type: 'string',
+                    ui: {
+                      columns: 4
+                    },
+                    rules: {
+                      required: 'dx: {{$root.age}} > 18'
+                    }
+                  },
+                  lastname: {
+                    type: 'string',
+                    ui: {
+                      columns: 4
+                    },
+                    rules: {
+                      required: {
+                        value: 'dx: {{$root.age}} > 18'
+                      }
+                    }
+                  }
+                }
+              }
+            },
+            {
+              id: md5('Array: Specify dx value'),
+              title: 'Array: Specify dx value',
+              formName: 'form_' + Math.random(),
+              formSchema: {
+                type: 'object',
+                properties: {
+                  age: {
+                    type: 'number'
+                  },
+                  users: {
+                    type: 'array',
+                    items: {
+                      type: 'object',
+                      properties: {
+                        firstname: {
+                          type: 'string',
+                          ui: {
+                            columns: 4
+                          },
+                          rules: {
+                            required: 'dx: {{$root.age}} > 18'
+                          }
+                        },
+                        lastname: {
+                          type: 'string',
+                          ui: {
+                            columns: 4
+                          },
+                          rules: {
+                            required: {
+                              value: 'dx: {{$root.age}} > 18'
+                            }
+                          }
+                        }
+                      }
+                    }
+                  },
+                  users1: {
+                    type: 'array',
+                    items: {
+                      type: 'object',
+                      properties: {
+                        age: {
+                          type: 'number',
+                          ui: {
+                            columns: 4
+                          }
+                        },
+                        name: {
+                          type: 'string',
+                          ui: {
+                            columns: 4
+                          },
+                          rules: {
+                            required: {
+                              value: 'dx: {{$root.users1[i].age}} > 18'
+                            }
+                          }
+                        }
+                      }
+                    }
+                  }
+                }
+              }
+            },
+            {
+              id: md5('Table: Specify dx value'),
+              title: 'Table: Specify dx value',
+              formName: 'form_' + Math.random(),
+              formSchema: {
+                type: 'object',
+                properties: {
+                  age: {
+                    type: 'number'
+                  },
+                  users: {
+                    type: 'array',
+                    items: {
+                      type: 'object',
+                      properties: {
+                        firstname: {
+                          type: 'string',
+                          ui: {
+                            columns: 4
+                          },
+                          rules: {
+                            required: 'dx: {{$root.age}} > 18'
+                          }
+                        },
+                        lastname: {
+                          type: 'string',
+                          ui: {
+                            columns: 4
+                          },
+                          rules: {
+                            required: {
+                              value: 'dx: {{$root.age}} > 18'
+                            }
+                          }
+                        }
+                      }
+                    },
+                    ui: {
+                      widget: 'array-table'
+                    }
+                  },
+                  users1: {
+                    type: 'array',
+                    items: {
+                      type: 'object',
+                      properties: {
+                        age: {
+                          type: 'number',
+                          ui: {
+                            columns: 4,
+                            linkFields: [
+                              {
+                                fieldPath: 'users1[i].name',
+                                rules: [ 'required' ]
+                              }
+                            ]
+                          }
+                        },
+                        name: {
+                          type: 'string',
+                          ui: {
+                            columns: 4
+                          },
+                          rules: {
+                            required: {
+                              value: 'dx: {{$root.users1[i].age}} > 18'
+                            }
+                          }
+                        }
+                      }
+                    },
+                    ui: {
+                      widget: 'array-table'
+                    }
+                  }
+                }
+              }
+            }
+          ]
+        }
+      });
+    </script>
+  </body>
+</html>