Add vue/no-invalid-attribute-name rule

docs/rules/README.md

@@ -326,6 +326,7 @@ For example:
 | [vue/no-duplicate-attr-inheritance](./no-duplicate-attr-inheritance.md) | enforce `inheritAttrs` to be set to `false` when using `v-bind="$attrs"` |  |
 | [vue/no-empty-component-block](./no-empty-component-block.md) | disallow the `<template>` `<script>` `<style>` block to be empty |  |
 | [vue/no-expose-after-await](./no-expose-after-await.md) | disallow asynchronously registered `expose` |  |
+| [vue/no-invalid-attribute-name](./no-invalid-attribute-name.md) | require valid attribute names |  |
 | [vue/no-invalid-model-keys](./no-invalid-model-keys.md) | require valid keys in model option |  |
 | [vue/no-multiple-objects-in-class](./no-multiple-objects-in-class.md) | disallow to pass multiple objects into array to class |  |
 | [vue/no-potential-component-option-typo](./no-potential-component-option-typo.md) | disallow a potential typo in your component property | :bulb: |

docs/rules/no-invalid-attribute-name.md

@@ -0,0 +1,43 @@
+---
+pageClass: rule-details
+sidebarDepth: 0
+title: vue/no-invalid-attribute-name
+description: require valid attribute names
+---
+# vue/no-invalid-attribute-name
+
+> require valid attribute names
+
+- :exclamation: <badge text="This rule has not been released yet." vertical="middle" type="error"> ***This rule has not been released yet.*** </badge>
+
+## :book: Rule Details
+
+This rule detects invalid HTML attributes.
+
+<eslint-code-block :rules="{'vue/no-invalid-attribute-name': ['error']}">
+
+```vue
+<template>
+  <!-- ✓ GOOD -->
+  <p foo.bar></p>
+  <p foo-bar></p>
+  <p _foo.bar></p>
+  <p :foo-bar></p>
+
+  <!-- ✗ BAD -->
+  <p 0abc></p>
+  <p -def></p>
+  <p !ghi></p>
+</template>
+```
+
+</eslint-code-block>
+
+## :wrench: Options
+
+Nothing.
+
+## :mag: Implementation
+
+- [Rule source](https://github.com/vuejs/eslint-plugin-vue/blob/master/lib/rules/no-invalid-attribute-name.js)
+- [Test source](https://github.com/vuejs/eslint-plugin-vue/blob/master/tests/lib/rules/no-invalid-attribute-name.js)

lib/index.js

@@ -93,6 +93,7 @@ module.exports = {
     'no-export-in-script-setup': require('./rules/no-export-in-script-setup'),
     'no-expose-after-await': require('./rules/no-expose-after-await'),
     'no-extra-parens': require('./rules/no-extra-parens'),
+    'no-invalid-attribute-name': require('./rules/no-invalid-attribute-name'),
     'no-invalid-model-keys': require('./rules/no-invalid-model-keys'),
     'no-irregular-whitespace': require('./rules/no-irregular-whitespace'),
     'no-lifecycle-after-await': require('./rules/no-lifecycle-after-await'),

lib/rules/no-invalid-attribute-name.js

@@ -0,0 +1,49 @@
+/**
+ * @author Doug Wade <douglas.b.wade@gmail.com>
+ * See LICENSE file in root directory for full license.
+ */
+'use strict'
+
+const utils = require('../utils')
+const xnv = require('xml-name-validator')
+
+module.exports = {
+  meta: {
+    type: 'problem',
+    docs: {
+      description: 'require valid attribute names',
+      categories: undefined,
+      url: 'https://eslint.vuejs.org/rules/no-invalid-attribute-name.html'
+    },
+    fixable: null,
+    schema: [],
+    messages: {
+      unexpected: 'Attribute name {{name}} is not valid.'
+    }
+  },
+  /** @param {RuleContext} context */
+  create(context) {
+    /**
+     * @param {string | VIdentifier} key
+     * @return {string}
+     */
+    const getName = (key) => (typeof key === 'string' ? key : key.name)
+
+    return utils.defineTemplateBodyVisitor(context, {
+      /** @param {VDirective | VAttribute} node */
+      VAttribute(node) {
+        const name = getName(node.key.name)
+
+        if (!xnv.name(name)) {
+          context.report({
+            node,
+            messageId: 'unexpected',
+            data: {
+              name
+            }
+          })
+        }
+      }
+    })
+  }
+}

package.json

@@ -59,7 +59,8 @@
     "nth-check": "^2.0.1",
     "postcss-selector-parser": "^6.0.9",
     "semver": "^7.3.5",
-    "vue-eslint-parser": "^8.0.1"
+    "vue-eslint-parser": "^8.0.1",
+    "xml-name-validator": "^4.0.0"
   },
   "devDependencies": {
     "@types/eslint": "^7.28.1",

tests/lib/rules/no-invalid-attribute-name.js

@@ -0,0 +1,78 @@
+/**
+ * @author *****your name*****
+ * See LICENSE file in root directory for full license.
+ */
+'use strict'
+
+const RuleTester = require('eslint').RuleTester
+const rule = require('../../../lib/rules/no-invalid-attribute-name')
+
+const tester = new RuleTester({
+  parser: require.resolve('vue-eslint-parser'),
+  parserOptions: {
+    ecmaVersion: 2020,
+    sourceType: 'module'
+  }
+})
+
+tester.run('no-invalid-attribute-name', rule, {
+  valid: [
+    {
+      filename: 'test.vue',
+      code: '<template><p foo /></template>'
+    },
+    {
+      filename: 'test.vue',
+      code: `<template><p foo="bar" /></template>`
+    },
+    {
+      filename: 'test.vue',
+      code: `<template><p foo-bar /></template>`
+    },
+    {
+      filename: 'test.vue',
+      code: `<template><p _foo-bar /></template>`
+    },
+    {
+      filename: 'test.vue',
+      code: `<template><p :foo-bar /></template>`
+    },
+    {
+      filename: 'test.vue',
+      code: `<template><p foo.bar /></template>`
+    },
+    {
+      filename: 'test.vue',
+      code: `<template><p quux-.9 /></template>`
+    }
+  ],
+  invalid: [
+    {
+      filename: 'test.vue',
+      code: `<template><p 0abc /></template>`,
+      errors: [
+        {
+          message: 'Attribute name 0abc is not valid.'
+        }
+      ]
+    },
+    {
+      filename: 'test.vue',
+      code: `<template><p -def></template>`,
+      errors: [
+        {
+          message: 'Attribute name -def is not valid.'
+        }
+      ]
+    },
+    {
+      filename: 'test.vue',
+      code: `<template><p !ghi /></template>`,
+      errors: [
+        {
+          message: 'Attribute name !ghi is not valid.'
+        }
+      ]
+    }
+  ]
+})