将iframe设置为远程内容的内容高度

window.addEventListener('load', function() {
  var height = document.documentElement.scrollHeight;
  window.parent.postMessage({height: height}, '*');
});

window.addEventListener('message', function(event) {
  if (event.data.height) {
    var iframe = document.querySelector('iframe[src="' + event.origin + '"]');
    if (iframe) {
      iframe.style.height = event.data.height + 'px';
    }
  }
});