How can I get a divs left and right margin in pixels if the divs margin is set to auto?

Question

jQuery(".container").css("margin-right")给我： auto ，而我想要52px或52 。

Answer 1

你可以得到当前宽度减去当前块的宽度再除以2

Answer 2

This method calculates the remaining space between an elements width and the remaining width in the container, which is what margin: auto SHOULD do. This does NOT necessarily return the margin that the element has.

var parentwidth = $('.container').parent().width();
var childwidth = $('.container').width();
var marginLeft = (parentwidth-childwidth)/2;

NB: if there is any padding this must be compensated for.

Answer 3

You can use $(".container").offset() to get the left position. So, the left position of the current control minus(-) current control gives you the necessary output.