first commit

app_vue/node_modules/enquirer/lib/queue.js

@@ -0,0 +1,33 @@
+'use strict';
+
+module.exports = class Queue {
+  _queue = [];
+  _executing = false;
+  _jobRunner = null;
+
+  constructor(jobRunner) {
+    this._jobRunner = jobRunner;
+  }
+
+  enqueue = (...args) => {
+    this._queue.push(args);
+    this._dequeue();
+  };
+
+  destroy() {
+    this._queue.length = 0;
+    this._jobRunner = null;
+  }
+
+  _dequeue() {
+    if (this._executing || !this._queue.length) return;
+    this._executing = true;
+
+    this._jobRunner(...this._queue.shift());
+
+    setTimeout(() => {
+      this._executing = false;
+      this._dequeue();
+    });
+  }
+};