Folds/unfolds all Firebase rules that are direct children of the "rules" node in the rules editor

firebase-toggle-fold.js

// Sometimes the rules editor lags when many rules are expanded.
// This snippet collapses all the rules that are direct children of the root "rules" node.
// Rules editor can be found at: https://console.firebase.google.com/project/{PROJECT_ID}/database/rules.

// Get CodeMirror instance
const editor = $('.CodeMirror')[0].CodeMirror;

// Find direct children of "rules" node and fold them.
editor.eachLine((l) => {
  // Perhaps a better way is to check the parent of `l` to handle different indentations.
  const isDirectChild = l.text.indexOf('    "') === 0 && l.text.indexOf('{') !== -1;
  if (!isDirectChild) return;
  const num = editor.getLineNumber(l);
  editor.foldCode(num);
});