javascript - 如何实现用户可自定义的键盘快捷键(在 javascript 中/在网络上)

Question

标题说明了大部分内容。我想要一个 javascript/html 解决方案，用于如何制作持久的、用户可配置的键盘快捷键监听器(加上任何关于如何实际保留首选项的好想法，如果你有的话)。

它看起来既简单又有点棘手:)

谢谢!

Answer 1

如果你想让用户获得像“Control”+(...)这样的快捷方式，你只需要捕获按下的键，所以检查“Control”是否在按下这些键的情况下被按下以执行操作。

这是一个简单但不好的例子:

var Pressed={
   CTRL:false,
   Spacebar:false
},Keyboard={ // an object containing Keyboard keys code
   CTRL:17,
   Spacebar:32
};
window.onkeydown=function(e){ // user started pressing an key (event)
   var Key=(e.keyCode||e.which||e.key); // capture key pressed from event
   if(Key==Keyboard.CTRL){ // CTRL is pressed
      Pressed.CTRL=true
      Pressed.Spacebar=false // CTRL has to be pressed before than Spacebar
   }else if(Key==Keyboard.Spacebar){ // Spacebar is pressed
      Pressed.Spacebar=true
   }
   if(Pressed.CTRL&&Pressed.Spacebar){ // Case CTRL+Spacebar are pressed
      e.preventDefault(); // prevent Opera from quitting from the page
      console.log("CTRL+Spacebar were pressed.")
   }
},
window.onkeyup=function(e){ // event when an key is released
   var Key=(e.keyCode||e.which||e.key); // capture key released from event
   if(Key==Keyboard.CTRL){ // CTRL is released
      Pressed.CTRL=false
   }else if(Key==Keyboard.Spacebar){ // Spacebar is released
      Pressed.Spacebar=false
   }
};

要更新...