.config/coc/extensions/node_modules/coc-prettier/node_modules/eslint/lib/rules/no-prototype-builtins.js

   1 /**
   2  * @fileoverview Rule to disallow use of Object.prototype builtins on objects
   3  * @author Andrew Levine
   4  */
   5 "use strict";
   6
   7 //------------------------------------------------------------------------------
   8 // Requirements
   9 //------------------------------------------------------------------------------
  10
  11 const astUtils = require("./utils/ast-utils");
  12
  13 //------------------------------------------------------------------------------
  14 // Rule Definition
  15 //------------------------------------------------------------------------------
  16
  17 module.exports = {
  18     meta: {
  19         type: "problem",
  20
  21         docs: {
  22             description: "disallow calling some `Object.prototype` methods directly on objects",
  23             category: "Possible Errors",
  24             recommended: true,
  25             url: "https://eslint.org/docs/rules/no-prototype-builtins"
  26         },
  27
  28         schema: [],
  29
  30         messages: {
  31             prototypeBuildIn: "Do not access Object.prototype method '{{prop}}' from target object."
  32         }
  33     },
  34
  35     create(context) {
  36         const DISALLOWED_PROPS = [
  37             "hasOwnProperty",
  38             "isPrototypeOf",
  39             "propertyIsEnumerable"
  40         ];
  41
  42         /**
  43          * Reports if a disallowed property is used in a CallExpression
  44          * @param {ASTNode} node The CallExpression node.
  45          * @returns {void}
  46          */
  47         function disallowBuiltIns(node) {
  48
  49             const callee = astUtils.skipChainExpression(node.callee);
  50
  51             if (callee.type !== "MemberExpression") {
  52                 return;
  53             }
  54
  55             const propName = astUtils.getStaticPropertyName(callee);
  56
  57             if (propName !== null && DISALLOWED_PROPS.indexOf(propName) > -1) {
  58                 context.report({
  59                     messageId: "prototypeBuildIn",
  60                     loc: callee.property.loc,
  61                     data: { prop: propName },
  62                     node
  63                 });
  64             }
  65         }
  66
  67         return {
  68             CallExpression: disallowBuiltIns
  69         };
  70     }
  71 };