Javascript:将CSS样式属性推送到数组中

var element = document.getElementById("myElement");
var styles = [];

styles.push(element.style.backgroundColor);

var element = document.getElementById("myElement");
var styles = [];

var computedStyle = window.getComputedStyle(element);
styles.push(computedStyle.width);

var element = document.getElementById("myElement");
var styles = [];

var styleDeclaration = element.style;
for (var i = 0; i < styleDeclaration.length; i++) {
  var property = styleDeclaration[i];
  styles.push(styleDeclaration.getPropertyValue(property));
}