mirror of
https://github.com/react/react-native-devtools-frontend.git
synced 2026-09-28 13:13:37 +08:00
Tim van der Lippe
16aca394c5
Major update breaking changes: - ESLint 7.0.0 (https://eslint.org/docs/user-guide/migrating-to-7.0.0) now includes .eslint.rc.js in its list, which is fine for us. Other changes are not applicable for us. - eslint-plugin-mocha (https://github.com/lo1tuma/eslint-plugin-mocha/blob/master/CHANGELOG.md#700-may-13-2020) drops support for ESLint <7, but this CL updates to 7+. Other changes are not applicable for us. DISABLE_THIRD_PARTY_CHECK=Updating ESLint R=petermarshall@chromium.org Change-Id: I7760e084ef87f73a92f9ea4e075fb4c065047f5a Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2534873 Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org> Reviewed-by: Peter Marshall <petermarshall@chromium.org>
44 lines
1.6 KiB
JavaScript
44 lines
1.6 KiB
JavaScript
'use strict';
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var keys = require('object-keys');
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module.exports = function hasSymbols() {
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if (typeof Symbol !== 'function' || typeof Object.getOwnPropertySymbols !== 'function') { return false; }
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if (typeof Symbol.iterator === 'symbol') { return true; }
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var obj = {};
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var sym = Symbol('test');
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var symObj = Object(sym);
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if (typeof sym === 'string') { return false; }
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if (Object.prototype.toString.call(sym) !== '[object Symbol]') { return false; }
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if (Object.prototype.toString.call(symObj) !== '[object Symbol]') { return false; }
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/*
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* temp disabled per https://github.com/ljharb/object.assign/issues/17
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* if (sym instanceof Symbol) { return false; }
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* temp disabled per https://github.com/WebReflection/get-own-property-symbols/issues/4
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* if (!(symObj instanceof Symbol)) { return false; }
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*/
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var symVal = 42;
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obj[sym] = symVal;
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for (sym in obj) { return false; } // eslint-disable-line no-unreachable-loop
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if (keys(obj).length !== 0) { return false; }
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if (typeof Object.keys === 'function' && Object.keys(obj).length !== 0) { return false; }
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if (typeof Object.getOwnPropertyNames === 'function' && Object.getOwnPropertyNames(obj).length !== 0) { return false; }
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var syms = Object.getOwnPropertySymbols(obj);
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if (syms.length !== 1 || syms[0] !== sym) { return false; }
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if (!Object.prototype.propertyIsEnumerable.call(obj, sym)) { return false; }
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if (typeof Object.getOwnPropertyDescriptor === 'function') {
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var descriptor = Object.getOwnPropertyDescriptor(obj, sym);
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if (descriptor.value !== symVal || descriptor.enumerable !== true) { return false; }
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}
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return true;
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};
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