Change the rules to support "v-is". (#1254)

* Change the rules to support "v-is".

- Change the `vue/attributes-order` rule to handle `v-is` as `DEFINITION` category.
- Change the `vue/no-unregistered-components` rule to handle `v-is` like `:is`.
- Change the `vue/no-unused-components` rule to handle `v-is` like `:is`.

* Add `"v-is"` to the syntax checked by the `vue/no-unsupported-features` rule.

docs/rules/attributes-order.md

@@ -15,7 +15,7 @@ description: enforce order of attributes
 This rule aims to enforce ordering of component attributes. The default order is specified in the [Vue styleguide](https://v3.vuejs.org/style-guide/#element-attribute-order-recommended) and is:
 
 - `DEFINITION`
-  e.g. 'is'
+  e.g. 'is', 'v-is'
 - `LIST_RENDERING`
   e.g. 'v-for item in items'
 - `CONDITIONALS`

docs/rules/no-unsupported-features.md

@@ -30,6 +30,7 @@ The `"ignores"` option accepts an array of the following strings.
   - Vue.js 3.0.0+
     - `"v-model-argument"` ... [argument on `v-model`][Vue RFCs - 0005-replace-v-bind-sync-with-v-model-argument]
     - `"v-model-custom-modifiers"` ... [custom modifiers on `v-model`][Vue RFCs - 0011-v-model-api-change]
+    - `"v-id"` ... [v-is](https://v3.vuejs.org/api/directives.html#v-is) directive.
   - Vue.js 2.6.0+
     - `"dynamic-directive-arguments"` ... [dynamic directive arguments](https://v3.vuejs.org/guide/template-syntax.html#dynamic-arguments).
     - `"v-slot"` ... [v-slot](https://v3.vuejs.org/api/directives.html#v-slot) directive.
@@ -90,6 +91,7 @@ The `"ignores"` option accepts an array of the following strings.
 
 ## :books: Further Reading
 
+- [API - v-is](https://v3.vuejs.org/api/directives.html#v-is)
 - [Guide - Dynamic Arguments](https://v3.vuejs.org/guide/template-syntax.html#dynamic-arguments)
 - [API - v-slot](https://v3.vuejs.org/api/directives.html#v-slot)
 - [API (for v2) - slot-scope](https://vuejs.org/v2/api/#slot-scope-deprecated)

lib/rules/attributes-order.js

@@ -84,6 +84,8 @@ function getAttributeType(attribute, sourceCode) {
         return ATTRS.CONTENT
       } else if (name === 'slot') {
         return ATTRS.UNIQUE
+      } else if (name === 'is') {
+        return ATTRS.DEFINITION
       } else {
         return ATTRS.OTHER_DIRECTIVES
       }

lib/rules/no-unregistered-components.js

@@ -95,7 +95,7 @@ module.exports = {
           usedComponentNodes.push({ node, name: node.rawName })
         },
         /** @param {VDirective} node */
-        "VAttribute[directive=true][key.name.name='bind'][key.argument.name='is']"(
+        "VAttribute[directive=true][key.name.name='bind'][key.argument.name='is'], VAttribute[directive=true][key.name.name='is']"(
           node
         ) {
           if (

lib/rules/no-unsupported-features.js

@@ -24,7 +24,8 @@ const FEATURES = {
   'v-bind-prop-modifier-shorthand': require('./syntaxes/v-bind-prop-modifier-shorthand'),
   // Vue.js 3.0.0+
   'v-model-argument': require('./syntaxes/v-model-argument'),
-  'v-model-custom-modifiers': require('./syntaxes/v-model-custom-modifiers')
+  'v-model-custom-modifiers': require('./syntaxes/v-model-custom-modifiers'),
+  'v-is': require('./syntaxes/v-is')
 }
 
 const cache = new Map()
@@ -93,7 +94,8 @@ module.exports = {
       forbiddenVModelArgument:
         'Argument on `v-model` is not supported until Vue.js "3.0.0".',
       forbiddenVModelCustomModifiers:
-        'Custom modifiers on `v-model` are not supported until Vue.js "3.0.0".'
+        'Custom modifiers on `v-model` are not supported until Vue.js "3.0.0".',
+      forbiddenVIs: '`v-is` are not supported until Vue.js "3.0.0".'
     }
   },
   /** @param {RuleContext} context */

lib/rules/no-unused-components.js

@@ -67,7 +67,7 @@ module.exports = {
           usedComponents.add(node.rawName)
         },
         /** @param {VDirective} node */
-        "VAttribute[directive=true][key.name.name='bind'][key.argument.name='is']"(
+        "VAttribute[directive=true][key.name.name='bind'][key.argument.name='is'], VAttribute[directive=true][key.name.name='is']"(
           node
         ) {
           if (

lib/rules/syntaxes/v-is.js

@@ -0,0 +1,26 @@
+/**
+ * @author Yosuke Ota
+ * See LICENSE file in root directory for full license.
+ */
+'use strict'
+module.exports = {
+  supported: '3.0.0',
+  /** @param {RuleContext} context @returns {TemplateListener} */
+  createTemplateBodyVisitor(context) {
+    /**
+     * Reports `v-is` node
+     * @param {VDirective} vSlotAttr node of `v-is`
+     * @returns {void}
+     */
+    function reportVSlot(vSlotAttr) {
+      context.report({
+        node: vSlotAttr.key,
+        messageId: 'forbiddenVIs'
+      })
+    }
+
+    return {
+      "VAttribute[directive=true][key.name.name='is']": reportVSlot
+    }
+  }
+}

lib/utils/index.js

@@ -578,7 +578,8 @@ module.exports = {
       (this.isHtmlElementNode(node) &&
         !this.isHtmlWellKnownElementName(node.rawName)) ||
       this.hasAttribute(node, 'is') ||
-      this.hasDirective(node, 'bind', 'is')
+      this.hasDirective(node, 'bind', 'is') ||
+      this.hasDirective(node, 'is')
     )
   },
 

tests/lib/rules/attributes-order.js

@@ -932,6 +932,17 @@ tester.run('attributes-order', rule, {
           message: 'Attribute "v-foo.a" should go before "v-foo.b".'
         }
       ]
+    },
+
+    {
+      filename: 'test.vue',
+      code: '<template><div v-cloak v-is="foo"></div></template>',
+      output: '<template><div v-is="foo" v-cloak></div></template>',
+      errors: [
+        {
+          message: 'Attribute "v-is" should go before "v-cloak".'
+        }
+      ]
     }
   ]
 })

tests/lib/rules/no-unregistered-components.js

@@ -378,6 +378,21 @@ tester.run('no-unregistered-components', rule, {
           <Component is />
         </template>
       `
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        <template>
+          <div v-is="'CustomComponent'" />
+        </template>
+        <script>
+        export default {
+          components: {
+            CustomComponent
+          }
+        }
+        </script>
+      `
     }
   ],
   invalid: [

tests/lib/rules/no-unsupported-features/v-is.js

@@ -0,0 +1,58 @@
+/**
+ * @author Yosuke Ota
+ * See LICENSE file in root directory for full license.
+ */
+'use strict'
+
+const RuleTester = require('eslint').RuleTester
+const rule = require('../../../../lib/rules/no-unsupported-features')
+const utils = require('./utils')
+
+const buildOptions = utils.optionsBuilder('v-is', '^2.6.0')
+const tester = new RuleTester({
+  parser: require.resolve('vue-eslint-parser'),
+  parserOptions: {
+    ecmaVersion: 2019
+  }
+})
+
+tester.run('no-unsupported-features/v-is', rule, {
+  valid: [
+    {
+      code: `
+      <template>
+        <div v-is="foo" />
+      </template>`,
+      options: buildOptions({ version: '^3.0.0' })
+    },
+    {
+      code: `
+      <template>
+        <div :is="foo" />
+      </template>`,
+      options: buildOptions()
+    },
+    {
+      code: `
+      <template>
+        <div v-is="foo" />
+      </template>`,
+      options: buildOptions({ version: '^2.5.0', ignores: ['v-is'] })
+    }
+  ],
+  invalid: [
+    {
+      code: `
+      <template>
+        <div v-is="foo" />
+      </template>`,
+      options: buildOptions(),
+      errors: [
+        {
+          message: '`v-is` are not supported until Vue.js "3.0.0".',
+          line: 3
+        }
+      ]
+    }
+  ]
+})

tests/lib/rules/no-unused-components.js

@@ -471,6 +471,21 @@ tester.run('no-unused-components', rule, {
           }
         }
       </script>`
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        <template>
+          <div v-is="'CustomComponent'" />
+        </template>
+        <script>
+        export default {
+          components: {
+            CustomComponent
+          }
+        }
+        </script>
+      `
     }
   ],
   invalid: [