html根字体js代码自适应.txt

//注意代码需要放在head中
function setRootFontSize() {
  var width = document.documentElement.clientWidth || document.body.clientWidth;
  if (width > 540) {
    width = 540;
  }
  fontSize = (width / 10);
  document.getElementsByTagName('html')[0].style['font-size'] = fontSize + 'px';
}
setRootFontSize();
window.addEventListener('resize', function () {
  setRootFontSize();
}, false);