You need to add static content in CSS to make it work.
Let us see an example −
HTML
<progress max = "100" value = "60" data-value = "5"></progress>
You need to add the following CSS. This is to add CSS generated content before and after the HTML5 progress element −
progress::-webkit-progress-bar:before, progress::-webkit-progress-bar:after { content: '989'; }