获取一个div元素的X和Y坐标 [英] getting the X and Y coordinates for a div element

问题描述

我一直在尝试使一个javascript获得一个 div 元素的X和Y坐标。经过一些尝试，我已经提出了一些数字，但我不知道如何验证它们的确切位置（脚本将X作为168和Y作为258返回）我运行的脚本的屏幕分辨率为1280 x 800.这是我用来得到这个结果的脚本：

I've been trying to make a javascript to get a X and Y coordinates of a div element. After some trying around I have come up with some numbers but I'm not sure how to validate the exact location of them(the script returns the X as 168 and Y as 258) I'm running the script with a screen resolution of 1280 x 800. This is the script I use to get this result:

function get_x(div) {
    var getY;
    var element = document.getElementById("" + div).offsetHeight;
    var get_center_screen = screen.width / 2;

    document.getElementById("span_x").innerHTML = element;
    return getX;
}

function get_y(div) {
    var getY;
    var element = document.getElementById("" + div).offsetWidth;
    var get_center_screen = screen.height / 2;

    document.getElementById("span_y").innerHTML = element;
    return getY;
}​

现在的问题是。假设这些是由函数返回的精确坐标是合理的，还是有一个容易在该位置产生一点点东西，看看究竟是什么？

Now the question is. Would it be reasonable to assume that these are accurate coordinates returned by the function or is there an easy to to just spawn a little something on that location to see what exactly it is?

最后我怎么会让这个 div 元素移动？我知道我应该使用一个 mousedown 事件处理程序和一段时间来继续移动元素，但是，任何提示/提示都非常感谢我最关心的是如何在循环中获得

And finally how would I go about making this div element move? I know I should use a mousedown event handler and a while to keep moving the element but yeah any tips/hints are greatly appreciated my biggest concern is to how to get that while loop running.

推荐答案

这里有一个简单的方式来获取有关HTML元素位置的各种信息：

Here a simple way to get various information regarding the position of a html element:

        var my_div = document.getElementById('my_div_id');
        var box = { left: 0, top: 0 };
        try {
            box = my_div.getBoundingClientRect();
        } 
        catch(e) 
        {}

        var doc = document,
            docElem = doc.documentElement,
            body = document.body,
            win = window,
            clientTop  = docElem.clientTop  || body.clientTop  || 0,
            clientLeft = docElem.clientLeft || body.clientLeft || 0,
            scrollTop  = win.pageYOffset || jQuery.support.boxModel && docElem.scrollTop  || body.scrollTop,
            scrollLeft = win.pageXOffset || jQuery.support.boxModel && docElem.scrollLeft || body.scrollLeft,
            top  = box.top  + scrollTop  - clientTop,
            left = box.left + scrollLeft - clientLeft;

这篇关于获取一个div元素的X和Y坐标的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！