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node_modules/eslint-plugin-react/lib/rules/no-is-mounted.js

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+/**
+ * @fileoverview Prevent usage of isMounted
+ * @author Joe Lencioni
+ */
+
+'use strict';
+
+const docsUrl = require('../util/docsUrl');
+
+// ------------------------------------------------------------------------------
+// Rule Definition
+// ------------------------------------------------------------------------------
+
+module.exports = {
+  meta: {
+    docs: {
+      description: 'Prevent usage of isMounted',
+      category: 'Best Practices',
+      recommended: true,
+      url: docsUrl('no-is-mounted')
+    },
+    schema: []
+  },
+
+  create(context) {
+    // --------------------------------------------------------------------------
+    // Public
+    // --------------------------------------------------------------------------
+
+    return {
+
+      CallExpression(node) {
+        const callee = node.callee;
+        if (callee.type !== 'MemberExpression') {
+          return;
+        }
+        if (callee.object.type !== 'ThisExpression' || callee.property.name !== 'isMounted') {
+          return;
+        }
+        const ancestors = context.getAncestors(callee);
+        for (let i = 0, j = ancestors.length; i < j; i++) {
+          if (ancestors[i].type === 'Property' || ancestors[i].type === 'MethodDefinition') {
+            context.report({
+              node: callee,
+              message: 'Do not use isMounted'
+            });
+            break;
+          }
+        }
+      }
+    };
+  }
+};