Add vue/no-mutating-props rule (from #633)

docs/rules/README.md

@@ -56,6 +56,7 @@ Enforce all the rules in this category, as well as all higher priority rules, wi
 | [vue/no-dupe-keys](./no-dupe-keys.md) | disallow duplication of field names |  |
 | [vue/no-duplicate-attributes](./no-duplicate-attributes.md) | disallow duplication of attributes |  |
 | [vue/no-lifecycle-after-await](./no-lifecycle-after-await.md) | disallow asynchronously registered lifecycle hooks |  |
+| [vue/no-mutating-props](./no-mutating-props.md) | disallow mutation of component props |  |
 | [vue/no-parsing-error](./no-parsing-error.md) | disallow parsing errors in `<template>` |  |
 | [vue/no-ref-as-operand](./no-ref-as-operand.md) | disallow use of value wrapped by `ref()` (Composition API) as an operand |  |
 | [vue/no-reserved-keys](./no-reserved-keys.md) | disallow overwriting reserved keys |  |
@@ -162,6 +163,7 @@ Enforce all the rules in this category, as well as all higher priority rules, wi
 | [vue/no-dupe-keys](./no-dupe-keys.md) | disallow duplication of field names |  |
 | [vue/no-duplicate-attributes](./no-duplicate-attributes.md) | disallow duplication of attributes |  |
 | [vue/no-multiple-template-root](./no-multiple-template-root.md) | disallow adding multiple root nodes to the template |  |
+| [vue/no-mutating-props](./no-mutating-props.md) | disallow mutation of component props |  |
 | [vue/no-parsing-error](./no-parsing-error.md) | disallow parsing errors in `<template>` |  |
 | [vue/no-reserved-keys](./no-reserved-keys.md) | disallow overwriting reserved keys |  |
 | [vue/no-shared-component-data](./no-shared-component-data.md) | enforce component's data property to be a function | :wrench: |

docs/rules/no-mutating-props.md

@@ -0,0 +1,99 @@
+---
+pageClass: rule-details
+sidebarDepth: 0
+title: vue/no-mutating-props
+description: disallow mutation of component props
+---
+# vue/no-mutating-props
+> disallow mutation of component props
+
+- :gear: This rule is included in all of `"plugin:vue/vue3-essential"`, `"plugin:vue/essential"`, `"plugin:vue/vue3-strongly-recommended"`, `"plugin:vue/strongly-recommended"`, `"plugin:vue/vue3-recommended"` and `"plugin:vue/recommended"`.
+
+## :book: Rule Details
+
+This rule reports mutation of component props.
+
+<eslint-code-block :rules="{'vue/no-mutating-props': ['error']}">
+
+```vue
+<!-- ✗ BAD -->
+<template>
+  <div>
+    <input v-model="value" @click="openModal">
+  </div>
+</template>
+<script>
+  export default {
+    props: {
+      value: {
+        type: String,
+        required: true
+      }
+    },
+    methods: {
+      openModal() {
+        this.value = 'test'
+      }
+    }
+  }
+</script>
+```
+
+</eslint-code-block>
+
+<eslint-code-block :rules="{'vue/no-mutating-props': ['error']}">
+
+```vue
+<!-- ✓ GOOD -->
+<template>
+  <div>
+    <input :value="value" @input="$emit('input', $event.target.value)" @click="openModal">
+  </div>
+</template>
+<script>
+  export default {
+    props: {
+      value: {
+        type: String,
+        required: true
+      }
+    },
+    methods: {
+      openModal() {
+        this.$emit('input', 'test')
+      }
+    }
+  }
+</script>
+```
+
+</eslint-code-block>
+
+<eslint-code-block :rules="{'vue/no-mutating-props': ['error']}">
+
+```vue
+<script>
+  export default {
+    setup (props) {
+      // ✗ BAD
+      props.value = 'test'
+    }
+  }
+</script>
+```
+
+</eslint-code-block>
+
+## :wrench: Options
+
+Nothing.
+
+## :books: Further reading
+
+- [Vue - Prop Mutation - deprecated](https://vuejs.org/v2/guide/migration.html#Prop-Mutation-deprecated)
+- [Style guide - Implicit parent-child communication](https://vuejs.org/v2/style-guide/#Implicit-parent-child-communication-use-with-caution)
+
+## :mag: Implementation
+
+- [Rule source](https://github.com/vuejs/eslint-plugin-vue/blob/master/lib/rules/no-mutating-props.js)
+- [Test source](https://github.com/vuejs/eslint-plugin-vue/blob/master/tests/lib/rules/no-mutating-props.js)

lib/configs/essential.js

@@ -11,6 +11,7 @@ module.exports = {
     'vue/no-dupe-keys': 'error',
     'vue/no-duplicate-attributes': 'error',
     'vue/no-multiple-template-root': 'error',
+    'vue/no-mutating-props': 'error',
     'vue/no-parsing-error': 'error',
     'vue/no-reserved-keys': 'error',
     'vue/no-shared-component-data': 'error',

lib/configs/vue3-essential.js

@@ -24,6 +24,7 @@ module.exports = {
     'vue/no-dupe-keys': 'error',
     'vue/no-duplicate-attributes': 'error',
     'vue/no-lifecycle-after-await': 'error',
+    'vue/no-mutating-props': 'error',
     'vue/no-parsing-error': 'error',
     'vue/no-ref-as-operand': 'error',
     'vue/no-reserved-keys': 'error',

lib/index.js

@@ -64,6 +64,7 @@ module.exports = {
     'no-lifecycle-after-await': require('./rules/no-lifecycle-after-await'),
     'no-multi-spaces': require('./rules/no-multi-spaces'),
     'no-multiple-template-root': require('./rules/no-multiple-template-root'),
+    'no-mutating-props': require('./rules/no-mutating-props'),
     'no-parsing-error': require('./rules/no-parsing-error'),
     'no-ref-as-operand': require('./rules/no-ref-as-operand'),
     'no-reserved-component-names': require('./rules/no-reserved-component-names'),