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Added queueMicrotask support #88

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Added queueMicrotask support #88

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0782108
Added queueMicrotask support
tinchoz49 Jun 5, 2020
632952a
Minor fix
tinchoz49 Jun 8, 2020
9e3e759
Detect shim updates and use task queue
tinchoz49 Jun 9, 2020
197c0ae
Minor fix
tinchoz49 Jun 9, 2020
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21 changes: 21 additions & 0 deletions browser.js
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Original file line number Diff line number Diff line change
Expand Up @@ -8,13 +8,28 @@ var process = module.exports = {};

var cachedSetTimeout;
var cachedClearTimeout;
var cachedQueueMicrotask

function defaultSetTimeout() {
throw new Error('setTimeout has not been defined');
}
function defaultClearTimeout () {
throw new Error('clearTimeout has not been defined');
}
function detectQueueMicrotask () {
if (cachedQueueMicrotask) {
return true;
}
try {
if (cachedQueueMicrotask !== queueMicrotask) {
cachedQueueMicrotask = queueMicrotask;
return true;
}
return false;
} catch (e) {
return false;
}
}
(function () {
try {
if (typeof setTimeout === 'function') {
Expand All @@ -34,6 +49,7 @@ function defaultClearTimeout () {
} catch (e) {
cachedClearTimeout = defaultClearTimeout;
}
detectQueueMicrotask();
} ())
function runTimeout(fun) {
if (cachedSetTimeout === setTimeout) {
Expand Down Expand Up @@ -138,8 +154,13 @@ process.nextTick = function (fun) {
args[i - 1] = arguments[i];
}
}

queue.push(new Item(fun, args));
if (queue.length === 1 && !draining) {
if (detectQueueMicrotask()) {
return cachedQueueMicrotask(drainQueue);
}

runTimeout(drainQueue);
}
};
Expand Down