How to set width of a div in percent in JavaScript?

Question

Is it possible to set the height/width of an element in percent using JavaScript or jQuery?

Answer 1

Also you can use .prop() and it should be better because

Since jQuery 1.6, these properties can no longer be set with the .attr() method. They do not have corresponding attributes and are only properties.

$(elem).prop('width', '100%');
$(elem).prop('height', '100%');