首页 / 脚本样式 / JavaScript / javascript获取隐藏dom的宽高 具体实现
首先clone一个DOM,设置position:absolute,然后设置top为一个比较大的负值,然后使其显示出来,最后获取到了DOM的宽高后,将其remove。
具体代码如下:
Js代码
复制代码 代码如下:
function getCss(elem, css){
if (window.getComputedStyle) {
return window.getComputedStyle(elem, null)[css];
}else if (elem.currentStyle) {
return elem.currentStyle[css];
}else {
return elem.style[css];
}
}
function getWH(dom){
var get = function(elem){
var wh = {};
"Width Height".replace(/[^ ]+/g, function(i){
var a = i.toLowerCase();
wh[a] = elem["offset" + i] || elem["client" + i];
});
return wh;
};
if (getCss(dom, "display") === "none") {
var nDom = dom.cloneNode(true);
nDom.style.position = "absolute";
nDom.style.top = "-3000px";
nDom.style.display = "block";
document.getElementsByTagName("body")[0].appendChild(nDom);
var wh = get(nDom);
nDom.parentNode.removeChild(nDom);
return wh;
}
return get(dom);
}
//test
console.log(getWH(document.getElementById("content")));
var domA = document.createElement("a"), _ostyle = "position:absolute;z-index:999999;width:92px;height:22px;position:absolute;display:none;";
domA.setAttribute("style", _ostyle);
domA.style.cssText = _ostyle;
domA.setAttribute("href", "javascript:void(0);");
document.getElementsByTagName("body")[0].appendChild(o);
console.log(getWH(domA));
function getCss(elem, css){
if (window.getComputedStyle) {
return window.getComputedStyle(elem, null)[css];
}else if (elem.currentStyle) {
return elem.currentStyle[css];
}else {
return elem.style[css];
}
}
function getWH(dom){
var get = function(elem){
var wh = {};
"Width Height".replace(/[^ ]+/g, function(i){
var a = i.toLowerCase();
wh[a] = elem["offset" + i] || elem["client" + i];
});
return wh;
};
if (getCss(dom, "display") === "none") {
var nDom = dom.cloneNode(true);
nDom.style.position = "absolute";
nDom.style.top = "-3000px";
nDom.style.display = "block";
document.getElementsByTagName("body")[0].appendChild(nDom);
var wh = get(nDom);
nDom.parentNode.removeChild(nDom);
return wh;
}
return get(dom);
}
//test
console.log(getWH(document.getElementById("content")));
var domA = document.createElement("a"), _ostyle = "position:absolute;z-index:999999;width:92px;height:22px;position:absolute;display:none;";
domA.setAttribute("style", _ostyle);
domA.style.cssText = _ostyle;
domA.setAttribute("href", "javascript:void(0);");
document.getElementsByTagName("body")[0].appendChild(o);
console.log(getWH(domA));
还有其他更好的方法欢迎提出来。