closest: function()

in _static/js/theme.js [43:67]

• 19 lines of code
• 5 McCabe index (conditional complexity)

  closest: function (el, selector) {
    var matchesFn;

    // find vendor prefix
    ['matches','webkitMatchesSelector','mozMatchesSelector','msMatchesSelector','oMatchesSelector'].some(function(fn) {
      if (typeof document.body[fn] == 'function') {
        matchesFn = fn;
        return true;
      }
      return false;
    });

    var parent;

    // traverse parents
    while (el) {
      parent = el.parentElement;
      if (parent && parent[matchesFn](selector)) {
        return parent;
      }
      el = parent;
    }

    return null;
  },