javascript - 如何检查在jquery中点击了什么？

Question

我想检查整个文档点击了什么，并将此信息保存到目标变量。

我想用点击目标的知识做一些逻辑。

示例代码如下:

$(document).ready(function(){
    console.log("Document is Ready");
    event = "";
    previousEvent = "";
    function init()
    {
        event = "";
        target = "";
    } init();
    function loop()
    {
        if(event==previousEvent) {event="EVENT_NOTHING"; }
        if(event!=previousEvent&&event!="EVENT_NOTHING") {
            console.log("EVENT: " + event);
            // (...) some logic (...)
        }

        previousEvent = event;
    }
    loop = setInterval(loop,100);

    //EVENTS
    $(document).keydown(function(e){
        var key = e.which;
        if(key == "37")      event = "EVENT_KEYPRESS_LEFTARROW";
        else if(key == "38") event = "EVENT_KEYPRESS_UPARROW";
        else if(key == "39") event = "EVENT_KEYPRESS_RIGHTARROW";
        else if(key == "40") event = "EVENT_KEYPRESS_DOWNARROW";
        else {event = "EVENT_KEYPRESS_UNBINDED";}
    });

    $(document).click(function(){
        event = "EVENT_KEYPRESS_CLICK";
        target = ???????; //for example element in canvas, or any tag in html
    });
});

Answer 1

事件有一个目标属性

$(document).click(function(e){
    event = "EVENT_KEYPRESS_CLICK";
    target = e.target;
});