26 lines
400 B
JavaScript
26 lines
400 B
JavaScript
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class Queue {
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constructor() {
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this.running = false;
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this.queue = [];
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}
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add(fn) {
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this.queue.push(fn);
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if (!this.running) this.next();
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}
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next() {
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this.running = true;
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if (this.queue.length === 0) {
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this.running = false;
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return;
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}
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const fn = this.queue.shift();
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Promise.resolve(fn()).then(() => this.next());
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}
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}
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module.exports = Queue;
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