I have a innerhtml

Lets say

<p>
<span>8218819999</span>
<span>hello</span>
</p>

I want add css property for first span tag

How can I do that ?? Using jquery or javascript.

This whole html is coming from AEM Label which I don’t have control over.

Using ngafterviewinit I’m getting the innerhtml But not sure how to update the css.