use initial width for element not working in IE

Like you said, generally width: auto will have a similar effect. Having the rules:

.my-selector {
    width: auto;
    width: initial;
}

Should cause it to use initial if it's supported and auto otherwise.

Using width: auto; inline, inside the script solves the problem on Chrome, FIrefox and IE 11. Just not sure if there is a better way.