在Tampermonkey中模拟mousedown,click,mouseup序列？

Question

我想模拟整个点击不仅仅是

document.getElementsByClassName()[0].click();

我怎么做？搜索结果似乎都是关于处理此类事件,而不是触发它们.

Answer 1

发送鼠标事件.像这样:

//--- Get the first link that has "stackoverflow" in its URL.
var targetNode = document.querySelector ("a[href*='stackoverflow']");
if (targetNode) {
    //--- Simulate a natural mouse-click sequence.
    triggerMouseEvent (targetNode, "mouseover");
    triggerMouseEvent (targetNode, "mousedown");
    triggerMouseEvent (targetNode, "mouseup");
    triggerMouseEvent (targetNode, "click");
}
else
    console.log ("*** Target node not found!");

function triggerMouseEvent (node, eventType) {
    var clickEvent = document.createEvent ('MouseEvents');
    clickEvent.initEvent (eventType, true, true);
    node.dispatchEvent (clickEvent);
}

如果网页是静态加载的,则可以正常工作.如果网页是由AJAX驱动的,请使用以下技术:

• "正常"按钮单击方法在Greasemonkey脚本中不起作用？
• 在AJAX驱动的站点上选择并激活正确的控件

注意:
问题代码有错误.您需要将类名传递给该函数.像这样:

document.getElementsByClassName ("SomeClassName")[0].click();

Answer 2

位优化

function fireMouseEvents( query, eventNames ){
    var element = document.querySelector(query);
    if(element && eventNames && eventNames.length){
        for(var index in eventNames){
            var eventName = eventNames[index];
            if(element.fireEvent ){
                element.fireEvent( 'on' + eventName );     
            } else {   
                var eventObject = document.createEvent( 'MouseEvents' );
                eventObject.initEvent( eventName, true, false );
                element.dispatchEvent(eventObject);
            }
        }
    }
}

你会像这样开火

fireMouseEvents("a[href*='stackoverflow']",['mouseover','mousedown','mouseup','click']);

Answer 3

在按我的预期工作之后，我对Brock的代码做了一些改进。

定义：

function simulateMouseClick(targetNode) {
    function triggerMouseEvent(targetNode, eventType) {
        var clickEvent = document.createEvent('MouseEvents');
        clickEvent.initEvent(eventType, true, true);
        targetNode.dispatchEvent(clickEvent);
    }
    ["mouseover", "mousedown", "mouseup", "click"].forEach(function(eventType) { 
        triggerMouseEvent(targetNode, eventType);
    });
}

调用示例：

simulateMouseClick(document);

simulateMouseClick(document.querySelector("a[href*='stackoverflow']"));