[New] jsx-no-literals: add noAttributeStrings option

Co-authored-by: TaLea Carpenter <taleacarpenter@gmail.com>
Co-authored-by: tanmoyopenroot <tanmoy.openroot@gmail.com>

Fixes ##2486

CHANGELOG.md

@@ -8,6 +8,7 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 ### Added
 * [`button-has-type`]: support trivial ternary expressions ([#2748][] @Hypnosphi)
 * [`jsx-handler-names`]: add `checkInlineFunction` option ([#2761][] @dididy)
+* [`jsx-no-literals`]: add `noAttributeStrings` option ([#2782][] @TaLeaMonet)
 
 ### Fixed
 * [`function-component-definition`]: ignore object properties ([#2771][] @stefan-wullems)
@@ -21,6 +22,7 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 [#2796]: https://github.com/yannickcr/eslint-plugin-react/pull/2796
 [#2791]: https://github.com/yannickcr/eslint-plugin-react/pull/2791
 [#2789]: https://github.com/yannickcr/eslint-plugin-react/pull/2789
+[#2782]: https://github.com/yannickcr/eslint-plugin-react/pull/2782
 [#2780]: https://github.com/yannickcr/eslint-plugin-react/pull/2780
 [#2779]: https://github.com/yannickcr/eslint-plugin-react/pull/2779
 [#2772]: https://github.com/yannickcr/eslint-plugin-react/pull/2772

docs/rules/jsx-no-literals.md

@@ -26,16 +26,17 @@ var Hello = <div>
 
 ## Rule Options
 
-There are two options:
+The supported options are:
 
 * `noStrings` (default: `false`) - Enforces no string literals used as children, wrapped or unwrapped.
 * `allowedStrings` - An array of unique string values that would otherwise warn, but will be ignored.
 * `ignoreProps` (default: `false`) - When `true` the rule ignores literals used in props, wrapped or unwrapped.
+* `noAttributeStrings` (default: `false`) - Enforces no string literals used in attributes when set to `true`.
 
 To use, you can specify as follows:
 
 ```js
-"react/jsx-no-literals": [<enabled>, {"noStrings": true, "allowedStrings": ["allowed"], "ignoreProps": false}]
+"react/jsx-no-literals": [<enabled>, {"noStrings": true, "allowedStrings": ["allowed"], "ignoreProps": false, "noAttributeStrings": true }]
 ```
 
 In this configuration, the following are considered warnings:
@@ -54,6 +55,12 @@ var Hello = <div>
 </div>;
 ```
 
+```jsx
+var Hello = <div>
+<img alt="test"> </img>
+</div>;
+```
+
 ```jsx
 var Hello = <div class='xx' />;
 ```
@@ -67,6 +74,7 @@ var Hello = <div class={`xx`} />;
 ```
 
 
+
 The following are **not** considered warnings:
 
 ```jsx
@@ -91,6 +99,13 @@ var Hello = <div>
 </div>;
 ```
 
+```jsx
+// a string value stored within a variable used as an attribute's value
+var Hello = <div>
+<img alt={imageDescription} {...props} />
+</div>;
+```
+
 ```jsx
 // spread props object
 var Hello = <Text {...props} />

lib/rules/jsx-no-literals.js

@@ -40,23 +40,37 @@ module.exports = {
         },
         ignoreProps: {
           type: 'boolean'
+        },
+        noAttributeStrings: {
+          type: 'boolean'
         }
       },
       additionalProperties: false
     }]
   },
 
   create(context) {
-    const defaults = {noStrings: false, allowedStrings: [], ignoreProps: false};
+    const defaults = {
+      noStrings: false,
+      allowedStrings: [],
+      ignoreProps: false,
+      noAttributeStrings: false
+    };
     const config = Object.assign({}, defaults, context.options[0] || {});
     config.allowedStrings = new Set(config.allowedStrings.map(trimIfString));
 
-    const message = config.noStrings
-      ? 'Strings not allowed in JSX files'
-      : 'Missing JSX expression container around literal string';
+    function defaultMessage() {
+      if (config.noAttributeStrings) {
+        return 'Strings not allowed in attributes';
+      }
+      if (config.noStrings) {
+        return 'Strings not allowed in JSX files';
+      }
+      return 'Missing JSX expression container around literal string';
+    }
 
     function reportLiteralNode(node, customMessage) {
-      const errorMessage = customMessage || message;
+      const errorMessage = customMessage || defaultMessage();
 
       context.report({
         node,
@@ -77,10 +91,22 @@ module.exports = {
         return false;
       }
       const parent = getParentIgnoringBinaryExpressions(node);
-      const standard = !/^[\s]+$/.test(node.value)
-          && typeof node.value === 'string'
-          && parent.type.indexOf('JSX') !== -1
-          && parent.type !== 'JSXAttribute';
+
+      function isParentNodeStandard() {
+        if (!/^[\s]+$/.test(node.value) && typeof node.value === 'string' && parent.type.includes('JSX')) {
+          if (config.noAttributeStrings) {
+            return parent.type === 'JSXAttribute';
+          }
+          if (!config.noAttributeStrings) {
+            return parent.type !== 'JSXAttribute';
+          }
+        }
+
+        return false;
+      }
+
+      const standard = isParentNodeStandard();
+
       if (config.noStrings) {
         return standard;
       }

tests/lib/rules/jsx-no-literals.js

@@ -39,6 +39,10 @@ function invalidProp(str) {
   return `Invalid prop value: “${str}”`;
 }
 
+function attributeMessage(str) {
+  return `Strings not allowed in attributes: “${str}”`;
+}
+
 const ruleTester = new RuleTester({parserOptions});
 ruleTester.run('jsx-no-literals', rule, {
 
@@ -331,6 +335,11 @@ ruleTester.run('jsx-no-literals', rule, {
         }      `,
       parser: parsers.BABEL_ESLINT,
       options: [{noStrings: true, ignoreProps: false}]
+    },
+    {
+      code: `
+        <img alt='blank image'></img>
+      `
     }
   ),
 
@@ -527,6 +536,14 @@ ruleTester.run('jsx-no-literals', rule, {
       errors: [
         {message: stringsMessage('\'bar\'')}
       ]
+    },
+    {
+      code: `
+        <img alt='blank image'></img>
+      `,
+      options: [{noAttributeStrings: true}],
+      errors: [
+        {message: attributeMessage('\'blank image\'')}]
     }
   ]
 });