如何通过url参数更改开放图形meta标签内容

<meta property="og:title" content="默认标题">
<meta property="og:image" content="默认图片URL">
<meta property="og:description" content="默认描述">

function getParameterByName(name, url) {
  if (!url) url = window.location.href;
  name = name.replace(/[\[\]]/g, "\\$&");
  var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
      results = regex.exec(url);
  if (!results) return null;
  if (!results[2]) return '';
  return decodeURIComponent(results[2].replace(/\+/g, " "));
}

var title = getParameterByName('title');
var image = getParameterByName('image');
var description = getParameterByName('description');

if (title) {
  document.querySelector('meta[property="og:title"]').setAttribute('content', title);
}

if (image) {
  document.querySelector('meta[property="og:image"]').setAttribute('content', image);
}

if (description) {
  document.querySelector('meta[property="og:description"]').setAttribute('content', description);
}