const getCursor = (domId) => {
  let win = document.getElementById(domId + "-iframe").contentWindow;
  let doc = document.getElementById(domId + "-iframe").contentDocument;

  document.getElementById(
    domId + "-iframe"
  ).contentWindow.document.body.onblur = function (e) {
    let getSelection = win.getSelection();

    //获取起始位置，这个是字符的序号位置，而不是坐标
    var start = getSelection.anchorOffset;
    //获取结束位置
    var end = getSelection.focusOffset;
    //获取起始的dom元素
    var startEl = getSelection.anchorNode.parentElement;
    //获取结束的dom元素
    var endEl = getSelection.focusNode.parentElement;

    // let rang = getSelection.getRangeAt(0);
    //获取页面选中范围range对象。selection对象包含0个或多个range对象。通过range对象的属性和方法就可以获取到鼠标光标所在的位置
    console.log("onblur", getSelection);

    // var node = document.createElement("span");
    // node.innerHTML = "测试";
    // rang.insertNode(node);
  };
};

export default getCursor;