Unable to get value of margin property from result getComputedStyle

Question

The result of a getComputedStyle contains a property named \"margin\", but the property is always an empty string (\"\") in Mozilla Firefox or Appl

Answer 1

The getComputedStyle() function should not evaluate the values of shorthand properties (such as margin, padding), only longhand properties (such as margin-top, margin-bottom, padding-top). In the case of shorthand properties it should only return an empty string.

var el = document.body.appendChild(document.createElement('div'));
el.style.margin = '2px';
var computed = getComputedStyle(el);

var longhands = ['margin-top', 'margin-bottom', 'margin-left', 'margin-right'];
longhands.forEach(function(e) { console.log(e + ': ' + computed.getPropertyValue(e)) });

In addition, you can take a look at this link for a cross-browser solution, which uses currentStyle for internet explorer