this bookmarklet saves form input values into localStorage

saveresults.js

javascript:(() => {
  let storageKey = 'input_values';
  let results = localStorage.getItem(storageKey);

  if(results) {
    if(confirm('反映しますか')) {
      results = JSON.parse(results);
      for(let key in results) {
        let element = document.querySelector(`*[name="${key}"]`);
        if(element) {
          element.value = results[key];
        }
      }
      return;
    }
  }

  if(confirm('保存しますか')) {
    let inputs = [...document.querySelectorAll('input:not([type="password"]):not([type="hidden"]),textarea,select')];
    let currentResults = {};
    for(let input of inputs) {
      currentResults[input.name] = input.value;
    }

    localStorage.setItem(storageKey, JSON.stringify(currentResults));
  }
})();