javascript - 如何通过javascript获取值translateX

Question

内容元素用 javascript 初始化

content.children[0].style.transform = "translateX(" + (-200) + "px) scaleX(" + 1.6 + ") scaleY(" + 1.2 + ")";

如何获取此元素的 translateX 值？

Answer 1

您可以使用 Window.getComputedStyle()

var myElement = document.querySelector('.hello');
// set inline-style transform to element
myElement.style.transform = "translateX(" + (-200) + "px) scaleX(" + 1.6 + ") scaleY(" + 1.2 + ")";

function getTranslateX() {
  var style = window.getComputedStyle(myElement);
  var matrix = new WebKitCSSMatrix(style.transform);
  console.log('translateX: ', matrix.m41);
}

document.querySelector('button').addEventListener('click', getTranslateX);

.hello {
    height: 100px;
    width: 100px;
    background: orange;
}

<div class="hello"></div>
<button type="button">get value</button>

与上面的示例相同，但不推荐使用:style.webkitTransform

var myElement = document.querySelector('.hello');
myElement.style.transform = "translateX(" + (-200) + "px) scaleX(" + 1.6 + ") scaleY(" + 1.2 + ")";

function getTranslateX() {
  var style = window.getComputedStyle(myElement);
  var matrix = new WebKitCSSMatrix(style.webkitTransform);
  console.log('translateX: ', matrix.m41);
}

document.querySelector('button').addEventListener('click', getTranslateX);

.hello {
    height: 100px;
    width: 100px;
    background: orange;
}

<div class="hello"></div>
<button type="button">get value</button>

如果您想知道为什么要解释 matrix.m41 here