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Teutonic CSS
Use it

Loading button

Interactive example: Click the “Click me” button to add a loading state and disable the button.

<button class="pa_m text_xl button prime" id="docsAddLoading">Click me</button>

  // Don't copy! It's just for demo purposes.
  document.querySelector('#docsAddLoading').addEventListener('click', function() { 
    this.setAttribute('disabled', 'true');