JSHint Options Chooser

chooser.js

// Just paste this into the console on http://www.jshint.com/docs/options/

(function() {
  var i, row, link, span, extraCol, checkbox, value;
  var rows = document.querySelectorAll('table.options tr');
  var links = document.querySelectorAll('table.options a');
  
  // add checkboxes
  for (var i = 0; i < rows.length; i++) {
    row = rows[i];
    extraCol = document.createElement('td');
    checkbox = document.createElement('input');
    value = document.createElement('input');
    value.value = 'true';
    value.style['margin-top'] = '16px';
    value.style.width = '40px';
    checkbox.type = 'checkbox';
    checkbox.dataset.option = row.querySelector('.name a').innerText;
    extraCol.appendChild(checkbox);
    extraCol.appendChild(value);
    extraCol.style['padding-right'] = '26px';
    row.insertBefore(extraCol, row.firstChild);
  }
  
  // clear links to make tabbing through checkboxes quick and easy
  for (i = 0; i < links.length; i++) {
    span = document.createElement('span');
    link = links[i];
    span.innerHTML = link.innerHTML;
    link.parentNode.replaceChild(span, link);
  }
  
  // add output stuff
  var parent = document.querySelectorAll('table.options:last-child')[0].parentNode;
  var output = document.createElement('textarea');
  output.setAttribute('rows', '14');
  output.setAttribute('cols', '26');
  output.style.display = 'block';
  output.style['margin-top'] = '16px';
  var button = document.createElement('button');
  button.innerText = 'Generate .jshintrc';
  button.addEventListener('click', function() {
    var checkbox, val;
    var checkboxes = document.querySelectorAll('table.options tr [type=checkbox]');
    var selectedOptions = {};
    for (i = 0; i < checkboxes.length; i++) {
      checkbox = checkboxes[i];
      if (checkbox.checked) {
        val = checkbox.nextSibling.value;
        // Type coercion
        if (!isNaN(val)) val = ~~val;
        if (val === 'true') val = true;
        if (val === 'false') val = false;
  
        selectedOptions[checkbox.dataset.option] = val;
      }
    }
    output.value = JSON.stringify(selectedOptions, null, 2);
  });
  parent.appendChild(button);
  parent.appendChild(output);
})();