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35 lines
826 B
35 lines
826 B
'use strict';
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function ready(flagOrFunction) {
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this._ready = !!this._ready;
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this._readyCallbacks = this._readyCallbacks || [];
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if (arguments.length === 0) {
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// return a promise
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// support `this.ready().then(onready);` and `yield this.ready()`;
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return new Promise(function (resolve) {
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if (this._ready) {
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return resolve();
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}
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this._readyCallbacks.push(resolve);
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}.bind(this));
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} else if (typeof flagOrFunction === 'function') {
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this._readyCallbacks.push(flagOrFunction);
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} else {
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this._ready = !!flagOrFunction;
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}
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if (this._ready) {
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this._readyCallbacks.splice(0, Infinity).forEach(function(callback) {
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process.nextTick(callback);
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});
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}
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}
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function mixin(object) {
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object.ready = ready;
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}
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module.exports = mixin;
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module.exports.mixin = mixin;
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