Add support for is="vue:" (Vue 3.1)

docs/rules/no-unsupported-features.md

@@ -29,6 +29,8 @@ This rule reports unsupported Vue.js syntax on the specified version.
 - `version` ... The `version` option accepts [the valid version range of `node-semver`](https://github.com/npm/node-semver#range-grammar). Set the version of Vue.js you are using. This option is required.
 - `ignores` ... You can use this `ignores` option to ignore the given features.
 The `"ignores"` option accepts an array of the following strings.
+  - Vue.js 3.1.0+
+    - `"is-attribute-with-vue-prefix"` ... [`is` attribute with `vue:` prefix](https://v3.vuejs.org/api/special-attributes.html#is)
   - 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]

lib/rules/no-deprecated-html-element-is.js

@@ -31,16 +31,34 @@ module.exports = {
   },
   /** @param {RuleContext} context */
   create(context) {
+    /** @param {VElement} node */
+    function isValidElement(node) {
+      return (
+        !utils.isHtmlWellKnownElementName(node.rawName) &&
+        !utils.isSvgWellKnownElementName(node.rawName)
+      )
+    }
     return utils.defineTemplateBodyVisitor(context, {
-      /** @param {VDirective | VAttribute} node */
-      "VAttribute[directive=true][key.name.name='bind'][key.argument.name='is'], VAttribute[directive=false][key.name='is']"(
+      /** @param {VDirective} node */
+      "VAttribute[directive=true][key.name.name='bind'][key.argument.name='is']"(
         node
       ) {
-        const element = node.parent.parent
-        if (
-          !utils.isHtmlWellKnownElementName(element.rawName) &&
-          !utils.isSvgWellKnownElementName(element.rawName)
-        ) {
+        if (isValidElement(node.parent.parent)) {
+          return
+        }
+        context.report({
+          node,
+          loc: node.loc,
+          messageId: 'unexpected'
+        })
+      },
+      /** @param {VAttribute} node */
+      "VAttribute[directive=false][key.name='is']"(node) {
+        if (isValidElement(node.parent.parent)) {
+          return
+        }
+        if (node.value && node.value.value.startsWith('vue:')) {
+          // Usage on native elements 3.1+
           return
         }
         context.report({

lib/rules/no-unregistered-components.js

@@ -119,11 +119,14 @@ module.exports = {
         /** @param {VAttribute} node */
         "VAttribute[directive=false][key.name='is']"(node) {
           if (
-            !node.value || // `<component is />`
-            utils.isHtmlWellKnownElementName(node.value.value)
+            !node.value // `<component is />`
           )
             return
-          usedComponentNodes.push({ node, name: node.value.value })
+          const value = node.value.value.startsWith('vue:') // Usage on native elements 3.1+
+            ? node.value.value.slice(4)
+            : node.value.value
+          if (utils.isHtmlWellKnownElementName(value)) return
+          usedComponentNodes.push({ node, name: value })
         },
         /** @param {VElement} node */
         "VElement[name='template'][parent.type='VDocumentFragment']:exit"() {

lib/rules/no-unsupported-features.js

@@ -25,7 +25,9 @@ const FEATURES = {
   // Vue.js 3.0.0+
   'v-model-argument': require('./syntaxes/v-model-argument'),
   'v-model-custom-modifiers': require('./syntaxes/v-model-custom-modifiers'),
-  'v-is': require('./syntaxes/v-is')
+  'v-is': require('./syntaxes/v-is'),
+  // Vue.js 3.1.0+
+  'is-attribute-with-vue-prefix': require('./syntaxes/is-attribute-with-vue-prefix')
 }
 
 const SYNTAX_NAMES = /** @type {(keyof FEATURES)[]} */ (Object.keys(FEATURES))
@@ -97,7 +99,9 @@ module.exports = {
         '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".',
-      forbiddenVIs: '`v-is` are not supported until Vue.js "3.0.0".'
+      forbiddenVIs: '`v-is` are not supported until Vue.js "3.0.0".',
+      forbiddenIsAttributeWithVuePrefix:
+        '`is="vue:"` are not supported until Vue.js "3.1.0".'
     }
   },
   /** @param {RuleContext} context */

lib/rules/no-unused-components.js

@@ -88,7 +88,10 @@ module.exports = {
           if (!node.value) {
             return
           }
-          usedComponents.add(node.value.value)
+          const value = node.value.value.startsWith('vue:') // Usage on native elements 3.1+
+            ? node.value.value.slice(4)
+            : node.value.value
+          usedComponents.add(value)
         },
         /** @param {VElement} node */
         "VElement[name='template']"(node) {

lib/rules/syntaxes/is-attribute-with-vue-prefix.js

@@ -0,0 +1,25 @@
+/**
+ * @author Yosuke Ota
+ * See LICENSE file in root directory for full license.
+ */
+'use strict'
+module.exports = {
+  supported: '>=3.1.0',
+  /** @param {RuleContext} context @returns {TemplateListener} */
+  createTemplateBodyVisitor(context) {
+    return {
+      /** @param {VAttribute} node */
+      "VAttribute[directive=false][key.name='is']"(node) {
+        if (!node.value) {
+          return
+        }
+        if (node.value.value.startsWith('vue:')) {
+          context.report({
+            node: node.value,
+            messageId: 'forbiddenIsAttributeWithVuePrefix'
+          })
+        }
+      }
+    }
+  }
+}

lib/rules/syntaxes/v-is.js

@@ -4,6 +4,7 @@
  */
 'use strict'
 module.exports = {
+  deprecated: '3.1.0',
   supported: '>=3.0.0',
   /** @param {RuleContext} context @returns {TemplateListener} */
   createTemplateBodyVisitor(context) {

tests/lib/rules/no-deprecated-html-element-is.js

@@ -37,6 +37,12 @@ ruleTester.run('no-deprecated-html-element-is', rule, {
     {
       filename: 'test.vue',
       code: '<template><component :is="\'foo\'" /></template>'
+    },
+
+    // is="vue:xxx"
+    {
+      filename: 'test.vue',
+      code: '<template><div is="vue:foo" /></template>'
     }
   ],
 

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

@@ -446,6 +446,19 @@ tester.run('no-unregistered-components', rule, {
         </script>
       `
     },
+    {
+      filename: 'test.vue',
+      code: `
+        <template>
+          <component is="vue:CustomComponent" />
+        </template>
+        <script>
+        export default {
+          name: 'CustomComponent'
+        }
+        </script>
+      `
+    },
     {
       filename: 'test.vue',
       code: `
@@ -706,6 +719,48 @@ tester.run('no-unregistered-components', rule, {
           line: 3
         }
       ]
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        <template>
+          <div is="vue:foo" />
+        </template>
+        <script>
+        export default {
+          components: {
+            bar
+          }
+        }
+        </script>
+      `,
+      errors: [
+        {
+          message: 'The "foo" component has been used but not registered.',
+          line: 3
+        }
+      ]
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        <template>
+          <div v-is="'foo'" />
+        </template>
+        <script>
+        export default {
+          components: {
+            bar
+          }
+        }
+        </script>
+      `,
+      errors: [
+        {
+          message: 'The "foo" component has been used but not registered.',
+          line: 3
+        }
+      ]
     }
   ]
 })

tests/lib/rules/no-unsupported-features/is-attribute-with-vue-prefix.js

@@ -0,0 +1,64 @@
+/**
+ * @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(
+  'is-attribute-with-vue-prefix',
+  '^3.1.0'
+)
+const tester = new RuleTester({
+  parser: require.resolve('vue-eslint-parser'),
+  parserOptions: {
+    ecmaVersion: 2019
+  }
+})
+
+tester.run('no-unsupported-features/is-attribute-with-vue-prefix', rule, {
+  valid: [
+    {
+      code: `
+       <template>
+         <div is="vue:foo" />
+       </template>`,
+      options: buildOptions()
+    },
+    {
+      code: `
+       <template>
+         <div is="foo" />
+       </template>`,
+      options: buildOptions({ version: '^2.5.0' })
+    },
+    {
+      code: `
+       <template>
+         <div is="vue:foo" />
+       </template>`,
+      options: buildOptions({
+        version: '^2.5.0',
+        ignores: ['is-attribute-with-vue-prefix']
+      })
+    }
+  ],
+  invalid: [
+    {
+      code: `
+      <template>
+        <div is="vue:foo" />
+      </template>`,
+      options: buildOptions({ version: '^3.0.0' }),
+      errors: [
+        {
+          message: '`is="vue:"` are not supported until Vue.js "3.1.0".',
+          line: 3
+        }
+      ]
+    }
+  ]
+})

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

@@ -486,6 +486,21 @@ tester.run('no-unused-components', rule, {
         }
         </script>
       `
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        <template>
+          <div is="vue:CustomComponent" />
+        </template>
+        <script>
+        export default {
+          components: {
+            CustomComponent
+          }
+        }
+        </script>
+      `
     }
   ],
   invalid: [