Question

If I were writing a JavaScript line to set a style attribute of an element it could look like this (this example: “width”):

document.getElementById('myDiv').style.width="50px";

and if there is a dash in the CSS element it would look like this (this example: “margin-top”):

document.getElementById('myDiv').style.marginTop="15px";

But how do I access the prefix -webkit-, if I want to give it a style like this example:

{-webkit-transition: width 1s;}

Answer 1

You have two options:

• style["-webkit-transition"]
• style.WebkitTransition

The first directly works. The second notation is called camel case, and foo-bar-baz becomes fooBarBaz. As a result, when a non camel case string starts with -, the first letter is capitalized in camel case.