移动端中 H5输入框在弹起键盘后被遮挡

<script type="text/javascript">
//防止键盘把当前输入框给挡住

$('input,textarea').on('click', function () {
    console.log('2222');
  var target = this;

  setTimeout(function(){

        target.scrollIntoViewIfNeeded();

   },100);

});
</script>