我想模拟按Tab键……扩展Trevor的回答，我们可以看到像“tab”这样的特殊键确实会被按下，但我们看不到按“tab”会产生的实际结果……

尝试与调度这些事件的'activeElement'以及全局文档对象都-代码添加下面;

代码片段如下:

var element = document.getElementById("firstInput"); document.addEventListener("keydown", function(event) { console.log('we got key:', event.key, ' keyCode:', event.keyCode, ' charCode:', event.charCode); /* enter is pressed */ if (event.keyCode == 13) { console.log('enter pressed:', event); theKey = 'Tab'; attributes = { bubbles: true, key: theKey, keyCode: 9, charCode: 0, }; setTimeout(function() { /* event.keyCode = 13; event.target.value += 'b'; */ var e = new window.KeyboardEvent('focus', attributes); document.activeElement.dispatchEvent(e); e = new window.KeyboardEvent('keydown', attributes); document.activeElement.dispatchEvent(e); e = new window.KeyboardEvent('beforeinput', attributes); document.activeElement.dispatchEvent(e); e = new window.KeyboardEvent('keypress', attributes); document.activeElement.dispatchEvent(e); e = new window.KeyboardEvent('input', attributes); document.activeElement.dispatchEvent(e); e = new window.KeyboardEvent('change', attributes); document.activeElement.dispatchEvent(e); e = new window.KeyboardEvent('keyup', attributes); document.activeElement.dispatchEvent(e); }, 4); setTimeout(function() { var e = new window.KeyboardEvent('focus', attributes); document.dispatchEvent(e); e = new window.KeyboardEvent('keydown', attributes); document.dispatchEvent(e); e = new window.KeyboardEvent('beforeinput', attributes); document.dispatchEvent(e); e = new window.KeyboardEvent('keypress', attributes); document.dispatchEvent(e); e = new window.KeyboardEvent('input', attributes); document.dispatchEvent(e); e = new window.KeyboardEvent('change', attributes); document.dispatchEvent(e); e = new window.KeyboardEvent('keyup', attributes); document.dispatchEvent(e); }, 100); } else if (event.keyCode != 0) { console.log('we got a non-enter press...: :', event.key, ' keyCode:', event.keyCode, ' charCode:', event.charCode); } }); <h2>convert each enter to a tab in JavaScript... check console for output</h2> <h3>we dispatchEvents on the activeElement... and the global element as well</h3> <input type='text' id='firstInput' /> <input type='text' id='secondInput' /> <button type="button" onclick="document.getElementById('demo').innerHTML = Date()"> Click me to display Date and Time.</button> <p id="demo"></p>

如果你可以使用jQuery 1.3.1:

函数simulateKeyPress(字符){ jQuery.event.trigger ({ 类型:键盘按键, 其中:character.charCodeAt (0) })； ｝ $(函数(){ 美元(的身体).keypress(函数(e) { 警报(e.which); })； simulateKeyPress(“e”); })； < script src = " https://cdnjs.cloudflare.com/ajax/libs/jquery/1.3.1/jquery.min.js " > > < /脚本

你可以使用dispatchEvent():

function simulateKeyPress() {
  var evt = document.createEvent("KeyboardEvent");
  evt.initKeyboardEvent("keypress", true, true, window,
                    0, 0, 0, 0,
                    0, "e".charCodeAt(0))
  var body = document.body;
  var canceled = !body.dispatchEvent(evt);
  if(canceled) {
    // A handler called preventDefault
    alert("canceled");
  } else {
    // None of the handlers called preventDefault
    alert("not canceled");
  }
}

我没有对此进行测试，但它改编自dispatchEvent()文档中的代码。您可能需要通读这些文档，以及createEvent()和initKeyEvent()的文档。

基于@aljgom的回答:

这对我来说很有效。而不是像aljgom建议的那样将事件分派给元素，而是将它分派给文档。

document.dispatchEvent(new KeyboardEvent("keydown", { key: "c" }));

由于在控制台上下文中易于使用，它曾经是单行的。但可能还是有用的。

Var pressthiskey = "q"/* <——q为例*/; var e = new事件("keydown"); E.key =按下这个键; e.keyCode = e.key.charCodeAt(0); e.which = e.keyCode; e.altKey = false; e.ctrlKey = true; e.shiftKey = false; e.metaKey = false; E.bubbles = true; document.dispatchEvent (e);

只需使用CustomEvent

Node.prototype.fire=function(type,options){
     var event=new CustomEvent(type);
     for(var p in options){
         event[p]=options[p];
     }
     this.dispatchEvent(event);
}

4 ex想模拟ctrl+z

window.addEventListener("keyup",function(ev){
     if(ev.ctrlKey && ev.keyCode === 90) console.log(ev); // or do smth
     })

 document.fire("keyup",{ctrlKey:true,keyCode:90,bubbles:true})