61 lines
1.4 KiB
JavaScript
61 lines
1.4 KiB
JavaScript
/**
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* @fileoverview Disallow using Date for timing in performance sensitive code
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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"use strict";
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module.exports = {
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meta: {
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docs: {
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url: "https://firefox-source-docs.mozilla.org/code-quality/lint/linters/eslint-plugin-mozilla/rules/avoid-Date-timing.html",
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},
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messages: {
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usePerfNow:
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"use performance.now() instead of Date.now() for timing measurements",
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},
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schema: [],
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type: "problem",
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},
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create(context) {
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return {
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CallExpression(node) {
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let callee = node.callee;
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if (
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callee.type !== "MemberExpression" ||
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callee.object.type !== "Identifier" ||
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callee.object.name !== "Date" ||
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callee.property.type !== "Identifier" ||
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callee.property.name !== "now"
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) {
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return;
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}
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context.report({
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node,
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messageId: "usePerfNow",
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});
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},
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NewExpression(node) {
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let callee = node.callee;
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if (
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callee.type !== "Identifier" ||
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callee.name !== "Date" ||
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node.arguments.length
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) {
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return;
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}
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context.report({
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node,
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messageId: "usePerfNow",
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});
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},
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};
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},
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};
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