javascript - 单击元素的 innerHTML

Question

如何使用 favelet 或脚本注入(inject)器获取随机网站页面上点击元素的 innerHTML？例如，单击此页面“提问”的正上方将返回以以下内容开头的内容:<div class="nav mainnavs " style="">
<ul style="">
<li style=""> .

我尝试从 slayeroffice.com 编辑一个 favelet，其最初目的是删除所选元素的子元素，但它似乎不起作用。

javascript:
var b = new Array();
var c= 1;
var d;
document.onkeydown = ck;
el = document.getElementsByTagName('*');
for (i = 0; i < el.length; i++)
    {
        if (el[i].tagName.search(/(HTML|BODY)/i) == -1) 
        {
            if (el[i].title) el[i].oldTitle = el[i].title;
            el[i].title = el[i].innerHTML;
            d=String(el[i].innerHTML);
            el[i].onclick = function(e)
            {
                t = this;
                if (window.event) e = window.event;
                if ((t == e.target) || (window.event)) alert(d);
                if (window.opera) e.stopPropagation();
                return false;
            };
            el[i].onmouseover = function() 
            {
                if (!c) return;
                c = 0;
                t = this;
                b[t] = t.style.backgroundColor;
                t.style.background = '#DADADA';
            };
            void(
            el[i].onmouseout = function()
            {
                t = this;
                t.style.backgroundColor = b[t];
                c = 1;
            });
        }

    }
function ck(e) 
{
    k = window.event ? window.event.keyCode : e.keyCode;
    if (k == 27) 
    {
        for (i = 0; i < el.length; i++) {
            if (el[i].tagName.search(/(HTML|BODY)/i) == -1) 
            {
                el[i].oldTitle ? el[i].title = el[i].oldTitle : el[i].removeAttribute('title');
                el[i].onclick = null;
                el[i].onmouseover = null;
                el[i].onmouseout = null;
                el[i].style.backgroundColor = b[t];
            }
        }
    }

}

有什么解决办法吗？

Answer 1

您可以将事件附加到文档的 onclick 处理程序。无需遍历页面上的每个元素。点击会冒泡到它...

document.onclick = function(event) {
    var target = event.target || event.srcElement;

    alert ( target.innerHTML ); 
};

但是我建议使用比“=”更好的方法来附加事件处理程序，因为它会覆盖任何先前定义的可能对页面操作至关重要的事件。

我之前使用过这个代码片段来实现更好的事件附加而无需 jQuery...

var bindEvent = function(elem ,evt,cb) {
        //see if the addEventListener function exists on the element
        if ( elem.addEventListener ) {
            elem.addEventListener(evt,cb,false);
        //if addEventListener is not present, see if this is an IE browser
        } else if ( elem.attachEvent ) {
            //prefix the event type with "on"
            elem.attachEvent('on' + evt, function(){
                /* use call to simulate addEventListener
                 * This will make sure the callback gets the element for "this"
                 * and will ensure the function's first argument is the event object
                 */
                 cb.call(event.srcElement,event);
            });
        }
    }

你只要打电话...

bindEvent(document,'click', function(event) {
    var target = event.target || event.srcElement;

    alert ( target.innerHTML ); 
});