| /** |
| * @fileoverview Rule to disallow use of Object.prototype builtins on objects |
| * @author Andrew Levine |
| */ |
| "use strict"; |
| |
| //------------------------------------------------------------------------------ |
| // Rule Definition |
| //------------------------------------------------------------------------------ |
| |
| module.exports = { |
| meta: { |
| type: "problem", |
| |
| docs: { |
| description: "disallow calling some `Object.prototype` methods directly on objects", |
| category: "Possible Errors", |
| recommended: true, |
| url: "https://eslint.org/docs/rules/no-prototype-builtins" |
| }, |
| |
| schema: [] |
| }, |
| |
| create(context) { |
| const DISALLOWED_PROPS = [ |
| "hasOwnProperty", |
| "isPrototypeOf", |
| "propertyIsEnumerable" |
| ]; |
| |
| /** |
| * Reports if a disallowed property is used in a CallExpression |
| * @param {ASTNode} node The CallExpression node. |
| * @returns {void} |
| */ |
| function disallowBuiltIns(node) { |
| if (node.callee.type !== "MemberExpression" || node.callee.computed) { |
| return; |
| } |
| const propName = node.callee.property.name; |
| |
| if (DISALLOWED_PROPS.indexOf(propName) > -1) { |
| context.report({ |
| message: "Do not access Object.prototype method '{{prop}}' from target object.", |
| loc: node.callee.property.loc.start, |
| data: { prop: propName }, |
| node |
| }); |
| } |
| } |
| |
| return { |
| CallExpression: disallowBuiltIns |
| }; |
| } |
| }; |