var elem = document.getElementById('mytest1');

// Simulate clicking on the specified element.
triggerEvent( elem, 'click' );

/**
 * Trigger the specified event on the specified element.
 * @param  {Object} elem  the target element.
 * @param  {String} event the type of the event (e.g. 'click').
 */
function triggerEvent( elem, event ) {
  var clickEvent = new Event( event ); // Create the event.
  elem.dispatchEvent( clickEvent );    // Dispatch the event.
}

参考

https://developer.mozilla.org/en-US/docs/Web/Guide/Events/Creating_and_triggering_events https://codepen.io/felquis/pen/damDA

比如一些简单的东西怎么样:

document.getElementById('elementID').click();

IE也支持。

document.getElementById("element").click()

只需从DOM中选择元素。该节点具有单击函数，您可以调用该函数。

Or

document.querySelector("#element").click()

var elem = document.getElementById('mytest1');

// Simulate clicking on the specified element.
triggerEvent( elem, 'click' );

/**
 * Trigger the specified event on the specified element.
 * @param  {Object} elem  the target element.
 * @param  {String} event the type of the event (e.g. 'click').
 */
function triggerEvent( elem, event ) {
  var clickEvent = new Event( event ); // Create the event.
  elem.dispatchEvent( clickEvent );    // Dispatch the event.
}

参考

https://developer.mozilla.org/en-US/docs/Web/Guide/Events/Creating_and_triggering_events https://codepen.io/felquis/pen/damDA

[编辑2022]这个答案真的过时了。现代化。原始答案在底部。

使用元素。dispatchEvent使用新创建的所需类型的Event。

下面是一个使用事件委托的例子。

Fork这个stackblitz项目来玩它。

// Note: {bubbles: true} because of the event delegation ... document.addEventListener(`click`, handle); document.addEventListener(`virtualhover`, handle); // the actual 'trigger' function const trigger = (el, etype, custom) => { const evt = custom ?? new Event( etype, { bubbles: true } ); el.dispatchEvent( evt ); }; // a custom event ;) const vHover = new CustomEvent(`virtualhover`, { bubbles: true, detail: `red` }); setTimeout( _ => trigger( document.querySelector(`#testMe`), `click` ), 1000 ); function handle(evt) { if (evt.target.id === `clickTrigger`) { trigger(document.querySelector(`#testMe`), `click`); } if (evt.type === `virtualhover`) { evt.target.style.color = evt.detail; return setTimeout( _ => evt.target.style.color = ``, 1000 ); } if (evt.target.id === `testMe`) { document.querySelector(`#testMeResult`) .insertAdjacentHTML(`beforeend`, `<p>One of us clicked #testMe. It was <i>${evt.isTrusted ? `<b>you</b>` : `me`}</i>.</p>`); trigger( document.querySelector(`#testMeResult p:last-child`), `virtualhover`, vHover ); } } body { font: 1.2rem/1.5rem verdana, arial; margin: 2rem; } #testMe { cursor: pointer; } p { margin: 0.2rem 0; } <div id="testMe"> Test me can be clicked </div> <p><button id='clickTrigger'>Click #testMe</button></p> <div id="testMeResult"></div>

老答案是:

这是我做的。这很简单，但很有效: 函数eventFire(el, etype){ if (el.fireEvent) { 埃尔。fireEvent('on' + etype); }其他{ var evObj = document.createEvent('Events'); evObj。initEvent(etype, true, false); el.dispatchEvent (evObj); ｝ ｝

如果事件没有被触发，请使用timeout

setTimeout(function(){ document.getElementById('your_id').click(); }, 200);