Checkbox strikethrough for Roam

// roam/js code snippet to add crossing out completed todos
// also adds the CSS classname custom-strikethrough for css mods

;(()=>{
  
  if( typeof window.roamhacker_checkboxStrikeout != 'undefined') return;

  window.roamhacker_checkboxStrikeout = {};

  const scanCheckboxes = () => {
    document.querySelectorAll('.check-container input').forEach( (element)=>{
      var span = element.parentElement.parentElement.parentElement
      if(element.checked) {
        span.classList.add('custom-strikethrough')
        span.style.textDecoration='line-through'
      } else {
        span.classList.remove('custom-strikethrough')
        span.style.textDecoration='none'
      }
    })
  }

  scanCheckboxes()
  var observerCheckBoxes = new MutationObserver(scanCheckboxes);
  observerCheckBoxes.observe(document.querySelector('#app'), {
    childList: true,
    subtree: true
  })

})();

Hi guys, newbie here... so how do I add this to Roam?
You need to add a roam/js block. So steps:

1. Create a new page in your Roam Graph (Name it whatever you want)
2. in a block type {{[[roam/js]]}} then ENTER
3. in the new block below the one you just typed into, press tab (this second block needs to be directly underneath the block from step 2 and needs to be indented under that block)
4. type /Code Block (forward slash for commands
5. Then you will see in the block a CODE editor. Very small. Paste the code from above into that code editor
6. In the code editor, change the code type to "Javascript" -- there is a list of supported coding languages in upper right hand corner of the code block
7. Press the button in the [[roam/js]] block to activate the code

Thank you 🙏🏼 It worked like a charm!!! I appreciate it!