title: Overwrite css style with GTM before page loads
body: <p>I have a section of my website that has a map inside a div that has an id with "display:none;" for mobile users. I would like to use Google Tag Manager and display that div with the map but I noticed that using a trigger by pageview is kinda slow when loading. The page loads and the div eventually displays the map but it shows broken since the js already loaded. </p>
  
  <p>Is there a faster way to trigger a custom html tag with GTM other than pageview? Thank you</p>