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127 lines
4.6 KiB
127 lines
4.6 KiB
/**
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* @fileoverview Rule to suggest using "Reflect" api over Function/Object methods
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* @author Keith Cirkel <http://keithcirkel.co.uk>
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* @deprecated in ESLint v3.9.0
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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/** @type {import('../shared/types').Rule} */
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module.exports = {
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meta: {
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type: "suggestion",
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docs: {
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description: "Require `Reflect` methods where applicable",
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recommended: false,
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url: "https://eslint.org/docs/latest/rules/prefer-reflect"
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},
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deprecated: true,
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replacedBy: [],
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schema: [
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{
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type: "object",
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properties: {
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exceptions: {
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type: "array",
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items: {
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enum: [
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"apply",
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"call",
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"delete",
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"defineProperty",
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"getOwnPropertyDescriptor",
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"getPrototypeOf",
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"setPrototypeOf",
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"isExtensible",
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"getOwnPropertyNames",
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"preventExtensions"
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]
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},
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uniqueItems: true
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}
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},
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additionalProperties: false
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}
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],
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messages: {
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preferReflect: "Avoid using {{existing}}, instead use {{substitute}}."
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}
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},
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create(context) {
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const existingNames = {
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apply: "Function.prototype.apply",
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call: "Function.prototype.call",
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defineProperty: "Object.defineProperty",
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getOwnPropertyDescriptor: "Object.getOwnPropertyDescriptor",
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getPrototypeOf: "Object.getPrototypeOf",
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setPrototypeOf: "Object.setPrototypeOf",
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isExtensible: "Object.isExtensible",
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getOwnPropertyNames: "Object.getOwnPropertyNames",
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preventExtensions: "Object.preventExtensions"
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};
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const reflectSubstitutes = {
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apply: "Reflect.apply",
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call: "Reflect.apply",
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defineProperty: "Reflect.defineProperty",
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getOwnPropertyDescriptor: "Reflect.getOwnPropertyDescriptor",
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getPrototypeOf: "Reflect.getPrototypeOf",
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setPrototypeOf: "Reflect.setPrototypeOf",
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isExtensible: "Reflect.isExtensible",
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getOwnPropertyNames: "Reflect.getOwnPropertyNames",
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preventExtensions: "Reflect.preventExtensions"
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};
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const exceptions = (context.options[0] || {}).exceptions || [];
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/**
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* Reports the Reflect violation based on the `existing` and `substitute`
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* @param {Object} node The node that violates the rule.
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* @param {string} existing The existing method name that has been used.
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* @param {string} substitute The Reflect substitute that should be used.
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* @returns {void}
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*/
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function report(node, existing, substitute) {
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context.report({
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node,
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messageId: "preferReflect",
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data: {
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existing,
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substitute
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}
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});
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}
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return {
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CallExpression(node) {
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const methodName = (node.callee.property || {}).name;
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const isReflectCall = (node.callee.object || {}).name === "Reflect";
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const hasReflectSubstitute = Object.prototype.hasOwnProperty.call(reflectSubstitutes, methodName);
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const userConfiguredException = exceptions.includes(methodName);
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if (hasReflectSubstitute && !isReflectCall && !userConfiguredException) {
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report(node, existingNames[methodName], reflectSubstitutes[methodName]);
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}
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},
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UnaryExpression(node) {
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const isDeleteOperator = node.operator === "delete";
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const targetsIdentifier = node.argument.type === "Identifier";
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const userConfiguredException = exceptions.includes("delete");
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if (isDeleteOperator && !targetsIdentifier && !userConfiguredException) {
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report(node, "the delete keyword", "Reflect.deleteProperty");
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}
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}
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};
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}
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};
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