javascript - Javascript音频暂停按钮有效，但不会再次恢复

Question

我正在尝试在Javascript上构建Swing Era自动点唱机。除了“针”，几乎所有东西都起作用。我希望我不是唯一仍然使用乙烯基的人!只需说一下暂停按钮就应该能够从音频被暂停的位置恢复，就像提起针并将其放在同一位置一样。到目前为止，它只能暂停。

这是JS代码，或者我认为是相关的摘录:

  var playtext = $("div#play").text()
  var playing = false

  function Jukebox(){
    this.tune = $("audio")[0];

    Jukebox.prototype.play = function(){ 
      this.tune.play();
      playing = true;
    }

    Jukebox.prototype.pause = function(){
      this.tune.pause(); //Apparently, pause is a built-in function?!
      playing = false;
    }

    Jukebox.prototype.needle = function(){
      if (playing = true) {
        this.tune.pause();
        playing = false; 
      }
      if (playing = false) {
        this.tune.play();
        playing = true; //After it is paused, it cannot play again?!  Why?
      }
    }

Answer 1

查看此声明

if(playing === true)

而不是

if(playing = true)