我已经使用addEventListener将事件附加到文本框。它工作得很好。当我想从另一个函数以编程方式触发事件时,问题就出现了。
我该怎么做呢?
我已经使用addEventListener将事件附加到文本框。它工作得很好。当我想从另一个函数以编程方式触发事件时,问题就出现了。
我该怎么做呢?
当前回答
接受的答案不适合我,createEvent的都不行。
最后对我有用的是:
targetElement.dispatchEvent(
new MouseEvent('click', {
bubbles: true,
cancelable: true,
view: window,
}));
Here’s a snippet: const clickBtn = document.querySelector('.clickme'); const viaBtn = document.querySelector('.viame'); viaBtn.addEventListener('click', function(event) { clickBtn.dispatchEvent( new MouseEvent('click', { bubbles: true, cancelable: true, view: window, })); }); clickBtn.addEventListener('click', function(event) { console.warn(`I was accessed via the other button! A ${event.type} occurred!`); }); <button class="clickme">Click me</button> <button class="viame">Via me</button>
从阅读: https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent
其他回答
function fireMouseEvent(obj, evtName) {
if (obj.dispatchEvent) {
//var event = new Event(evtName);
var event = document.createEvent("MouseEvents");
event.initMouseEvent(evtName, true, true, window,
0, 0, 0, 0, 0, false, false, false, false, 0, null);
obj.dispatchEvent(event);
} else if (obj.fireEvent) {
event = document.createEventObject();
event.button = 1;
obj.fireEvent("on" + evtName, event);
obj.fireEvent(evtName);
} else {
obj[evtName]();
}
}
var obj = document.getElementById("......");
fireMouseEvent(obj, "click");
你可以使用我一起编译的这个函数。
if (!Element.prototype.trigger)
{
Element.prototype.trigger = function(event)
{
var ev;
try
{
if (this.dispatchEvent && CustomEvent)
{
ev = new CustomEvent(event, {detail : event + ' fired!'});
this.dispatchEvent(ev);
}
else
{
throw "CustomEvent Not supported";
}
}
catch(e)
{
if (document.createEvent)
{
ev = document.createEvent('HTMLEvents');
ev.initEvent(event, true, true);
this.dispatchEvent(event);
}
else
{
ev = document.createEventObject();
ev.eventType = event;
this.fireEvent('on'+event.eventType, event);
}
}
}
}
触发以下事件:
var dest = document.querySelector('#mapbox-directions-destination-input');
dest.trigger('focus');
观察事件:
dest.addEventListener('focus', function(e){
console.log(e);
});
希望这能有所帮助!
HTML
<a href="demoLink" id="myLink"> myLink </a>
<button onclick="fireLink(event)"> Call My Link </button>
JS
// click event listener of the link element --------------
document.getElementById('myLink').addEventListener("click", callLink);
function callLink(e) {
// code to fire
}
// function invoked by the button element ----------------
function fireLink(event) {
document.getElementById('myLink').click(); // script calls the "click" event of the link element
}
我只是使用了以下方法(似乎更简单):
element.blur();
element.focus();
在这种情况下,只有当值真的发生改变时才会触发事件,就像由用户执行的正常焦点轨迹丢失会触发它一样。
我使用JavaScript搜索了鼠标悬停时的触发点击,鼠标下拉和鼠标上拉事件。我找到了胡安·门德斯提供的答案。点击这里获取答案。
点击这里是现场演示,下面是代码:
function fireEvent(node, eventName) {
// Make sure we use the ownerDocument from the provided node to avoid cross-window problems
var doc;
if (node.ownerDocument) {
doc = node.ownerDocument;
} else if (node.nodeType == 9) {
// the node may be the document itself, nodeType 9 = DOCUMENT_NODE
doc = node;
} else {
throw new Error("Invalid node passed to fireEvent: " + node.id);
}
if (node.dispatchEvent) {
// Gecko-style approach (now the standard) takes more work
var eventClass = "";
// Different events have different event classes.
// If this switch statement can't map an eventName to an eventClass,
// the event firing is going to fail.
switch (eventName) {
case "click": // Dispatching of 'click' appears to not work correctly in Safari. Use 'mousedown' or 'mouseup' instead.
case "mousedown":
case "mouseup":
eventClass = "MouseEvents";
break;
case "focus":
case "change":
case "blur":
case "select":
eventClass = "HTMLEvents";
break;
default:
throw "fireEvent: Couldn't find an event class for event '" + eventName + "'.";
break;
}
var event = doc.createEvent(eventClass);
var bubbles = eventName == "change" ? false : true;
event.initEvent(eventName, bubbles, true); // All events created as bubbling and cancelable.
event.synthetic = true; // allow detection of synthetic events
// The second parameter says go ahead with the default action
node.dispatchEvent(event, true);
} else if (node.fireEvent) {
// IE-old school style
var event = doc.createEventObject();
event.synthetic = true; // allow detection of synthetic events
node.fireEvent("on" + eventName, event);
}
};