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fix(core): should check Zone existance when scheduleMicroTask (#20656)

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PR Close #20656
This commit is contained in:
JiaLi.Passion
2017-11-28 16:23:24 +09:00
committed by Alex Rickabaugh
parent 7b120b5f73
commit 3a86940ca5
2 changed files with 11 additions and 2 deletions
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9
packages/core/src/util.ts
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@ -21,6 +21,8 @@ const __self = typeof self !== 'undefined' && typeof WorkerGlobalScope !== 'unde
self instanceof WorkerGlobalScope && self;
const __global = typeof global !== 'undefined' && global;
const _global: {[name: string]: any} = __window || __global || __self;
const promise: Promise<any> = Promise.resolve(0);
/**
* Attention: whenever providing a new value, be sure to add an
* entry into the corresponding `....externs.js` file,
@ -52,7 +54,12 @@ export function getSymbolIterator(): string|symbol {
}
export function scheduleMicroTask(fn: Function) {
Zone.current.scheduleMicroTask('scheduleMicrotask', fn);
if (typeof Zone === 'undefined') {
// use promise to schedule microTask instead of use Zone
promise.then(() => { fn && fn.apply(null, null); });
} else {
Zone.current.scheduleMicroTask('scheduleMicrotask', fn);
}
}
// JS has NaN !== NaN