Add a forbid-dom-props rule

A new rule forbid-dom-props was added. It is based on
forbid-component-props but it only forbid property on DOM Node
elements.

This can be useful to enforce some good practices, as not using 'id'
attributes or inline styles.

Author: davazp

README.md

@@ -88,6 +88,7 @@ Finally, enable all of the rules that you would like to use.  Use [our preset](#
 * [react/destructuring-assignment](docs/rules/destructuring-assignment.md): Rule enforces consistent usage of destructuring assignment in component
 * [react/display-name](docs/rules/display-name.md): Prevent missing `displayName` in a React component definition
 * [react/forbid-component-props](docs/rules/forbid-component-props.md): Forbid certain props on Components
+* [react/forbid-dom-props](docs/rules/forbid-dom-props.md): Forbid certain props on DOM Nodes
 * [react/forbid-elements](docs/rules/forbid-elements.md): Forbid certain elements
 * [react/forbid-prop-types](docs/rules/forbid-prop-types.md): Forbid certain propTypes
 * [react/forbid-foreign-prop-types](docs/rules/forbid-foreign-prop-types.md): Forbid foreign propTypes

docs/rules/forbid-dom-props.md

@@ -0,0 +1,45 @@
+# Forbid certain props on DOM Nodes (react/forbid-dom-props)
+
+This rule prevents passing of props to elements. This rule only applies to DOM Nodes (e.g. `<div />`) and not Components (e.g. `<Component />`).
+The list of forbidden props can be customized with the `forbid` option.
+
+## Rule Details
+
+This rule checks all JSX elements and verifies that no forbidden props are used
+on DOM Nodes. This rule is off by default.
+
+The following patterns are considered warnings:
+
+```jsx
+// [1, { "forbid": ["id"] }]
+<div id='Joe' />
+```
+
+```jsx
+// [1, { "forbid": ["style"] }]
+<div style={{color: 'red'}} />
+```
+
+The following patterns are **not** considered warnings:
+
+```jsx
+// [1, { "forbid": ["id"] }]
+<Hello id='foo' />
+```
+
+```jsx
+// [1, { "forbid": ["id"] }]
+<Hello id={{color: 'red'}} />
+```
+
+## Rule Options
+
+```js
+...
+"react/forbid-dom-props": [<enabled>, { "forbid": [<string>] }]
+...
+```
+
+### `forbid`
+
+An array of strings, with the names of props that are forbidden. The default value of this option `[]`.

index.js

@@ -8,6 +8,7 @@ const allRules = {
   'destructuring-assignment': require('./lib/rules/destructuring-assignment'),
   'display-name': require('./lib/rules/display-name'),
   'forbid-component-props': require('./lib/rules/forbid-component-props'),
+  'forbid-dom-props': require('./lib/rules/forbid-dom-props'),
   'forbid-elements': require('./lib/rules/forbid-elements'),
   'forbid-prop-types': require('./lib/rules/forbid-prop-types'),
   'forbid-foreign-prop-types': require('./lib/rules/forbid-foreign-prop-types'),

lib/rules/forbid-dom-props.js

@@ -0,0 +1,68 @@
+/**
+ * @fileoverview Forbid certain props on DOM Nodes
+ * @author David Vázquez
+ */
+'use strict';
+
+// ------------------------------------------------------------------------------
+// Constants
+// ------------------------------------------------------------------------------
+
+const DEFAULTS = [];
+
+// ------------------------------------------------------------------------------
+// Rule Definition
+// ------------------------------------------------------------------------------
+
+module.exports = {
+  meta: {
+    docs: {
+      description: 'Forbid certain props on DOM Nodes',
+      category: 'Best Practices',
+      recommended: false
+    },
+
+    schema: [{
+      type: 'object',
+      properties: {
+        forbid: {
+          type: 'array',
+          items: {
+            type: 'string'
+          }
+        }
+      },
+      additionalProperties: true
+    }]
+  },
+
+  create: function(context) {
+    function isForbidden(prop) {
+      const configuration = context.options[0] || {};
+
+      const forbid = configuration.forbid || DEFAULTS;
+      return forbid.indexOf(prop) >= 0;
+    }
+
+    return {
+      JSXAttribute: function(node) {
+        const tag = node.parent.name.name;
+        if (!(tag && tag[0] !== tag[0].toUpperCase())) {
+          // This is a Component, not  a DOM node, so exit.
+          return;
+        }
+
+        const prop = node.name.name;
+
+        if (!isForbidden(prop)) {
+          return;
+        }
+
+        context.report({
+          node: node,
+          message: `Prop \`${prop}\` is forbidden on DOM Nodes`
+        });
+      }
+    };
+  }
+};

tests/lib/rules/forbid-dom-props.js

@@ -0,0 +1,104 @@
+/**
+ * @fileoverview Tests for forbid-dom-props
+ */
+'use strict';
+
+// -----------------------------------------------------------------------------
+// Requirements
+// -----------------------------------------------------------------------------
+
+const rule = require('../../../lib/rules/forbid-dom-props');
+const RuleTester = require('eslint').RuleTester;
+
+const parserOptions = {
+  ecmaVersion: 8,
+  sourceType: 'module',
+  ecmaFeatures: {
+    experimentalObjectRestSpread: true,
+    jsx: true
+  }
+};
+
+require('babel-eslint');
+
+// -----------------------------------------------------------------------------
+// Tests
+// -----------------------------------------------------------------------------
+
+const ID_ERROR_MESSAGE = 'Prop `id` is forbidden on DOM Nodes';
+
+const ruleTester = new RuleTester({parserOptions});
+ruleTester.run('forbid-element-props', rule, {
+
+  valid: [{
+    code: [
+      'var First = createReactClass({',
+      '  render: function() {',
+      '    return <Foo id="foo" />;',
+      '  }',
+      '});'
+    ].join('\n'),
+    options: [{forbid: ['id']}]
+  }, {
+    code: [
+      'var First = createReactClass({',
+      '  propTypes: externalPropTypes,',
+      '  render: function() {',
+      '    return <Foo id="bar" style={{color: "red"}} />;',
+      '  }',
+      '});'
+    ].join('\n'),
+    options: [{forbid: ['style', 'id']}]
+  }, {
+    code: [
+      'var First = createReactClass({',
+      '  propTypes: externalPropTypes,',
+      '  render: function() {',
+      '    return <this.Foo bar="baz" />;',
+      '  }',
+      '});'
+    ].join('\n'),
+    options: [{forbid: ['id']}]
+  }, {
+    code: [
+      'class First extends createReactClass {',
+      '  render() {',
+      '    return <this.foo id="bar" />;',
+      '  }',
+      '}'
+    ].join('\n'),
+    options: [{forbid: ['id']}]
+  }, {
+    code: [
+      'const First = (props) => (',
+      '  <this.Foo {...props} />',
+      ');'
+    ].join('\n'),
+    options: [{forbid: ['id']}]
+  }, {
+    code: [
+      'const First = (props) => (',
+      '  <div name="foo" />',
+      ');'
+    ].join('\n'),
+    options: [{forbid: ['id']}]
+  }],
+
+  invalid: [{
+    code: [
+      'var First = createReactClass({',
+      '  propTypes: externalPropTypes,',
+      '  render: function() {',
+      '    return <div id="bar" />;',
+      '  }',
+      '});'
+    ].join('\n'),
+    options: [{forbid: ['id']}],
+    errors: [{
+      message: ID_ERROR_MESSAGE,
+      line: 4,
+      column: 17,
+      type: 'JSXAttribute'
+    }]
+  }]
+});