Changing width property of a :before css selector using JQuery [duplicate]

Question

I have a page that has an image in it and I styled it using :before CSS selectors.
The image is dynamic so it hasn't a fixed width; So I need to set :before rule's width dynamically.
I want do it in client side using JQuery.
Assume this:

.column:before{     width: 300px;     float: left;     content: "";     height: 430px; }  .column{     width: 500px;     float: right;     padding: 5px;     overflow: hidden;     text-align: justify; } 

How Can I only change the width property of class with :before selector (and not one without it) using JQuery?

Answer 1

I don't think there's a jQuery-way to directly access the pseudoclass' rules, but you could always append a new style element to the document's head like:

$('head').append('<style>.column:before{width:800px !important;}</style>'); 

See a live demo here

I also remember having seen a plugin that tackles this issue once but I couldn't find it on first googling unfortunately.