是否可以在 Javascript 中的 css3 转换期间获取目标计算的 css 属性值？

Question

是否可以在 JavaScript 中的 css3 转换期间获取目标（最终）计算的 css 属性值？

我找到了这个答案： Is it possible to get the target css property value during a css3 transition in Javascript?

所以，我可以得到它

document.getElementById('transition_div').style.width

但这仅在 css 中指定目标 css 属性时才有效。我需要获取动态计算的目标属性值 - CSS 中未指定。

HTML：

<table>
    <tr>
        <td id="cell-1">CELL 1</td>
        <td id="cell-2">CELL 2</td>
        <td id="cell-3">CELL 3 some text</td>
    <tr>
<table>

CSS

td {
    transition: all 3s linear;
}

JS

setTimeout(function() { //let's browser draw initial state
    document.getElementById("cell-1").style["min-width"] = "300px"; //resize one of cells

    setTimeout(function() {
        //NOW, a second later, transition is in progress

        //HOW to get target width of #cell-3 ????

    }, 1000);

}, 0);

JS FIDDLE： http://jsfiddle.net/R62yk/1/

Answer 1

您可以使用window.getComputedStyle。试试这个：

setTimeout(function() { //let's browser draw initial state
    document.getElementById("cell-1").style["min-width"] = "300px"; //resize one of cells

    setTimeout(function() {
        //NOW, a second later, transition is in progress

        //HOW to get target width of #cell-3 ????
        var cell = document.getElementById("cell-3"),
            width = getComputedStyle(cell,null).getPropertyValue("width");
        // computed width is 206px
    }, 1000);

}, 0);