Add ignoreProps option to vue/prop-name-casing (#2679)

Co-authored-by: Flo Edelmann <[email protected]>
Co-authored-by: Wayne Zhang <[email protected]>

Author: 3 people

docs/rules/prop-name-casing.md

@@ -39,12 +39,18 @@ export default {
 
 ```json
 {
-  "vue/prop-name-casing": ["error", "camelCase" | "snake_case"]
+  "vue/prop-name-casing": ["error",
+    "camelCase" | "snake_case",
+    {
+      "ignoreProps": []
+    }
+  ]
 }
 ```
 
 - `"camelCase"` (default) ... Enforce property names in `props` to camel case.
 - `"snake_case"` ... Enforce property names in `props` to snake case.
+- `ignoreProps` (`string[]`) ... An array of prop names (or patterns) that don't need to follow the specified casing.
 
 ### `"snake_case"`
 
@@ -67,6 +73,31 @@ export default {
 
 </eslint-code-block>
 
+### `"ignoreProps": ["foo-bar", "/^_[a-z]+/u"]`
+
+<eslint-code-block :rules="{'vue/prop-name-casing': ['error', 'camelCase', {
+ignoreProps: ['foo-bar', '/^_[a-z]+/u'] }]}">
+
+```vue
+<script>
+export default {
+  props: {
+    /* ✓ GOOD */
+    greetingText: String,
+    'foo-bar': String,
+    _uid: String,
+
+    /* ✗ BAD */
+    'greeting-text': String,
+    greeting_text: String,
+    foo_bar: String
+  }
+}
+</script>
+```
+
+</eslint-code-block>
+
 ## :couple: Related Rules
 
 - [vue/attribute-hyphenation](./attribute-hyphenation.md)

lib/rules/prop-name-casing.js

@@ -6,6 +6,7 @@
 
 const utils = require('../utils')
 const casing = require('../utils/casing')
+const { toRegExp } = require('../utils/regexp')
 const allowedCaseOptions = ['camelCase', 'snake_case']
 
 /**
@@ -15,6 +16,8 @@ const allowedCaseOptions = ['camelCase', 'snake_case']
 /** @param {RuleContext} context */
 function create(context) {
   const options = context.options[0]
+  /** @type {RegExp[]} */
+  const ignoreProps = (context.options[1]?.ignoreProps || []).map(toRegExp)
   const caseType = allowedCaseOptions.includes(options) ? options : 'camelCase'
   const checker = casing.getChecker(caseType)
 
@@ -27,7 +30,7 @@ function create(context) {
       if (propName == null) {
         continue
       }
-      if (!checker(propName)) {
+      if (!checker(propName) && !ignoreProps.some((re) => re.test(propName))) {
         context.report({
           node: item.node,
           messageId: 'invalidCase',
@@ -64,6 +67,17 @@ module.exports = {
     schema: [
       {
         enum: allowedCaseOptions
+      },
+      {
+        type: 'object',
+        properties: {
+          ignoreProps: {
+            type: 'array',
+            items: { type: 'string' },
+            uniqueItems: true
+          }
+        },
+        additionalProperties: false
       }
     ],
     messages: {

tests/lib/rules/prop-name-casing.js

@@ -149,7 +149,7 @@ ruleTester.run('prop-name-casing', rule, {
       languageOptions
     },
     {
-      // valiable computed property name does not warn
+      // variable computed property name does not warn
       filename: 'test.vue',
       code: `
         export default {
@@ -161,7 +161,7 @@ ruleTester.run('prop-name-casing', rule, {
       languageOptions
     },
     {
-      // valiable computed property name does not warn
+      // variable computed property name does not warn
       filename: 'test.vue',
       code: `
         export default {
@@ -359,6 +359,23 @@ ruleTester.run('prop-name-casing', rule, {
           parser: require.resolve('@typescript-eslint/parser')
         }
       }
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        export default {
+          props: {
+            'ignored-pattern-test': String,
+            ignored_prop: Number,
+            validProp: Boolean
+          }
+        }
+      `,
+      options: [
+        'camelCase',
+        { ignoreProps: ['ignored_prop', '/^ignored-pattern-/'] }
+      ],
+      languageOptions
     }
   ],
 
@@ -686,6 +703,54 @@ ruleTester.run('prop-name-casing', rule, {
               }
             ]
           }
-        ])
+        ]),
+    {
+      filename: 'test.vue',
+      code: `
+        export default {
+          props: {
+            notIgnored_prop: String,
+            'other-pattern': Number,
+            'pattern-valid': String
+          }
+        }
+      `,
+      options: ['camelCase', { ignoreProps: ['ignored_prop', '/^pattern-/'] }],
+      languageOptions,
+      errors: [
+        {
+          message: 'Prop "notIgnored_prop" is not in camelCase.',
+          type: 'Property',
+          line: 4
+        },
+        {
+          message: 'Prop "other-pattern" is not in camelCase.',
+          type: 'Property',
+          line: 5
+        }
+      ]
+    },
+    {
+      filename: 'test.vue',
+      code: `
+        export default {
+          props: ['notIgnored_prop', 'pattern_invalid', 'validProp', 'pattern-valid']
+        }
+      `,
+      options: ['camelCase', { ignoreProps: ['ignored_prop', '/^pattern-/'] }],
+      languageOptions,
+      errors: [
+        {
+          message: 'Prop "notIgnored_prop" is not in camelCase.',
+          type: 'Literal',
+          line: 3
+        },
+        {
+          message: 'Prop "pattern_invalid" is not in camelCase.',
+          type: 'Literal',
+          line: 3
+        }
+      ]
+    }
   ]
 })