Get all child’s width jquery

[html]
<ul>
<li>AAA</li>
<li>AAA</li>
<li>AAA</li>
<li>AAA</li>
</ul>
[/html]
[php]
var ul_width = 0;
jQuery( ‘ul li’ ).each(function(index, element) {
ul_width += jQuery( this ).innerWidth;
});
jQuery( ‘ul’ ).each(function(index, element) {
jQuery( this ).width(ul_width);
});
[/php]