Safari userscript

userscript.js

window.addEventListener('load', function() {
  if (!document.location.href.startsWith('https://app.clubhouse.io/')) { return; }
  
  function isDropdownNode(node) {
    return node.nodeType === Node.ELEMENT_NODE && node.classList.contains('dropdown');
  }
  
  document.addEventListener('DOMNodeInserted', function(event) {
    var insertedNode = event.target;

    if (!isDropdownNode(insertedNode)) return;
    
    Array.from(insertedNode.querySelectorAll('input[class^="git-branch"]')).forEach(function (input) {
      input.value = input.value.replace(/\b\w+\/ch(\d+)\//, 'ch$1/');
    });
  }, false);
});