这是我找到的:

函数createKeyboardEvent(名称，键，altKey, ctrlKey, shiftKey, metaKey，气泡){ var e = new事件(name) E.key = key e.keyCode = e.key.charCodeAt(0) e.which = e.keyCode e.altKey = altKey e.ctrlKey = ctrlKey e.shiftKey = shiftKey e.metaKey = metaKey e.泡泡=泡泡 返回e ｝ Var name = 'keydown' Var键= 'a' var event = createKeyboardEvent(name, key, false, false, false, false, true) 文档。addEventListener(name， () => {}) document.dispatchEvent(事件)

一个非jquery版本，工作在webkit和gecko:

var keyboardEvent = document.createEvent('KeyboardEvent'); var initMethod = typeof keyboardEvent.initKeyboardEvent !== 'undefined' ? 'initKeyboardEvent' : 'initKeyEvent'; keyboardEvent[initMethod]( 'keydown', // event type: keydown, keyup, keypress true, // bubbles true, // cancelable window, // view: should be window false, // ctrlKey false, // altKey false, // shiftKey false, // metaKey 40, // keyCode: unsigned long - the virtual key code, else 0 0, // charCode: unsigned long - the Unicode character associated with the depressed key, else 0 ); document.dispatchEvent(keyboardEvent);

下面是一个在Chrome和Chromium上工作的解决方案(只测试了这些平台)。似乎Chrome有一些错误或自己的方法来处理关键代码，所以这个属性必须单独添加到KeyboardEvent。

函数simulateKeydown (keycode, istrl,isAlt,isShift){ var e = new KeyboardEvent("keydown"，{冒泡泡:true, cancelable:true, char:String.fromCharCode(keycode)， key:String.fromCharCode(keycode)， shiftKey:isShift, ctrlKey:isCtrl, altKey:isAlt}); Object.defineProperty(e， 'keyCode'， {get: function(){返回this.keyCodeVal;}}); e.keyCodeVal = keycode; document.dispatchEvent (e); ｝ simulateKeydown(39, false, false, false);

对于那些感兴趣的人，您可以可靠地重新创建键盘输入事件。为了更改输入区域中的文本(移动游标，或通过输入字符移动页面)，必须严格遵循DOM事件模型:http://www.w3.org/TR/DOM-Level-3-Events/#h4_events-inputevents

该模型应该做到:

焦点(使用目标设置在DOM上分派)

然后对于每个字符:

keydown(在DOM上分派) Beforeinput(如果它是一个文本区域或输入，在目标分派) 按键(在DOM上分派) 输入(如果是文本区域或输入，则在目标处分派) 改变(如果它是一个选择，在目标分派) keyup(在DOM上分派)

然后，可选的大多数:

模糊(随目标设置在DOM上分派)

这实际上是通过javascript改变页面中的文本(不修改值语句)，并适当地设置任何javascript侦听器/处理程序。如果你把顺序弄乱了，javascript就不会按适当的顺序触发，输入框中的文本不会改变，选择不会改变，或者光标不会移动到文本区域的下一个空格。

不幸的是，代码是为雇主写的，所以我不能分享它，但这绝对是可能的，但你必须以正确的顺序为每个元素重新创建整个关键输入“堆栈”。

编辑:我不是这个答案的原始海报，但我已经测试过了，我不能让它更新输入字段。下面是一个代码片段，其中的代码供其他人尝试或查看

let element = document.querySelector('input'); element.onkeydown = e => console.log('keydown on element: ' + e.key); document.onkeydown = e => console.log('keydown on document: ' + e.key + " " + e.target); dispatchButton.onclick = () => dispatchKey(element, 'a') dispatchKey = (target, key) => { let dom = document; // focus (dispatched on the DOM with the target set) let ev = new Event('focus', {target: target}); // this part seems to not work? when logging the // target in the onkeypress function it shows `document` instead of `input` // I also tried these and got the same behavior // ev.target = target; // and // Object.defineProperty(ev, 'target', {writable: false, value: target}); dom.dispatchEvent(ev); // keydown (dispatched on the DOM) dom.dispatchEvent(new KeyboardEvent('keydown', {'key': key, target: target})); // beforeinput (dispatched at the target if it's a textarea or input) target.dispatchEvent(new Event('beforeinput')); // keypress (dispatched on the DOM) dom.dispatchEvent(new KeyboardEvent('keypress', {'key': key})); // input (dispatched at the target if it's a textarea or input) target.dispatchEvent(new Event('input')); // change (dispatched at the target if it's a select) // keyup (dispatched on the DOM) dom.dispatchEvent(new KeyboardEvent('keyup', {'key': key})); // Then, optionally for most: // blur (dispatched on the DOM with the target set) dom.dispatchEvent(new Event('blur', {target: target})); console.log('dispatched'); } <input/> <button id="dispatchButton">Press to dispatch events </button>

只要用户按下有问题的键，你就可以存储对该even的引用，并将其用于任何HTML其他元素:

EnterKeyPressToEmulate<input class="lineEditInput" id="addr333_1" type="text" style="width:60%;right:0%;float:right" onkeydown="keyPressRecorder(event)"></input> TypeHereToEmulateKeyPress<input class="lineEditInput" id="addr333_2" type="text" style="width:60%;right:0%;float:right" onkeydown="triggerKeyPressOnNextSiblingFromWithinKeyPress(event)"> Itappears Here Too<input class="lineEditInput" id="addr333_3" type="text" style="width:60%;right:0%;float:right;" onkeydown="keyPressHandler(event)"> <script> var gZeroEvent; function keyPressRecorder(e) { gZeroEvent = e; } function triggerKeyPressOnNextSiblingFromWithinKeyPress(TTT) { if(typeof(gZeroEvent) != 'undefined') { TTT.currentTarget.nextElementSibling.dispatchEvent(gZeroEvent); keyPressHandler(TTT); } } function keyPressHandler(TTT) { if(typeof(gZeroEvent) != 'undefined') { TTT.currentTarget.value+= gZeroEvent.key; event.preventDefault(); event.stopPropagation(); } } </script>

如果你创建自己的事件，你可以设置keyCode，你可以从任何真实的键盘事件复制现有的参数(忽略目标，因为它的工作dispatchEvent)和:

ta = new KeyboardEvent('keypress',{ctrlKey:true,key:'Escape'})

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);