Javascript - 模拟空格键按键
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Javascript - Emulate a space bar keypress
提问by Oliver
I've searched everywhere, read the docs on MDN, but I can't seem to solve this problem.
我到处搜索，阅读 MDN 上的文档，但我似乎无法解决这个问题。
I want to emulate the client pressing the space bar using Javascript.
我想模拟客户端使用 Javascript 按下空格键。
I've tried:
我试过了：
var e = new KeyboardEvent('keydown');
e.which = e.keyCode = 32; // 32 is the keycode for the space bar
document.dispatchEvent(e);
However this hasn't worked for whatever reason; if the following event handler is put before the above code:
然而，无论出于何种原因，这都不起作用；如果将以下事件处理程序放在上述代码之前：
document.addEventListener('keydown', function(ev){
console.log(ev.which);
});
0is logged to the console.
0记录到控制台。
For some reason, the event is triggered but the key is always 0
由于某种原因，事件被触发，但关键总是 0
Can someone help me fix it?
有人可以帮我解决吗？
回答by R Lam
You may do on this way
你可以这样做
var e = new KeyboardEvent('keydown',{'keyCode':32,'which':32});
var e = new KeyboardEvent('keydown',{'keyCode':32,'which':32});
Demo: https://jsfiddle.net/5se13tmg/
演示：https: //jsfiddle.net/5se13tmg/
Reference: https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/KeyboardEvent
参考：https: //developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/KeyboardEvent
回答by J. Gobet
Create your event variable like that :
像这样创建您的事件变量：
var e = new Event('keydown');
