js模拟输入

window.___inputValue = function (dom, st) {
  var evt = new InputEvent('input', {
    inputType: 'insertText',
    data: st,
    dataTransfer: null,
    isComposing: false
  });
  dom.value = st;
  dom.dispatchEvent(evt);
}
window.___inputValue(xxx, 'aa');