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frontend/webapp/node_modules/eslint-plugin-react/lib/rules/jsx-uses-vars.js

@@ -0,0 +1,62 @@
+/**
+ * @fileoverview Prevent variables used in JSX to be marked as unused
+ * @author Yannick Croissant
+ */
+
+'use strict';
+
+const docsUrl = require('../util/docsUrl');
+const markVariableAsUsed = require('../util/eslint').markVariableAsUsed;
+
+// ------------------------------------------------------------------------------
+// Rule Definition
+// ------------------------------------------------------------------------------
+
+const isTagNameRe = /^[a-z]/;
+const isTagName = (name) => isTagNameRe.test(name);
+
+/** @type {import('eslint').Rule.RuleModule} */
+module.exports = {
+  // eslint-disable-next-line eslint-plugin/prefer-message-ids -- https://github.com/not-an-aardvark/eslint-plugin-eslint-plugin/issues/292
+  meta: {
+    docs: {
+      description: 'Disallow variables used in JSX to be incorrectly marked as unused',
+      category: 'Best Practices',
+      recommended: true,
+      url: docsUrl('jsx-uses-vars'),
+    },
+    schema: [],
+  },
+
+  create(context) {
+    return {
+      JSXOpeningElement(node) {
+        let name;
+        if (node.name.namespace) {
+          // <Foo:Bar>
+          return;
+        }
+        if (node.name.name) {
+          // <Foo>
+          name = node.name.name;
+          // Exclude lowercase tag names like <div>
+          if (isTagName(name)) {
+            return;
+          }
+        } else if (node.name.object) {
+          // <Foo...Bar>
+          let parent = node.name.object;
+          while (parent.object) {
+            parent = parent.object;
+          }
+          name = parent.name;
+        } else {
+          return;
+        }
+
+        markVariableAsUsed(name, node, context);
+      },
+
+    };
+  },
+};