qjkankan_v1.1.1/packages/qjkankan-editor/src/directives/vTitleInManageCenter.js

import Vue from "vue";

let timerId = null;
let intervalId = null;
let isShowTitle = false;
let titleNode = null;

function removeTitle() {
  if (!isShowTitle) {
    clearTimeout(timerId);
  } else {
    isShowTitle = false;
    document.body.removeChild(titleNode);
    clearInterval(intervalId);
  }
}

Vue.directive("title", {
  bind: function (el, binding) {
    if (!binding.value) {
      return;
    }
    el.addEventListener(
      "mousemove",
      function (e) {
        if (!isShowTitle) {
          clearTimeout(timerId);
          timerId = setTimeout(() => {
            isShowTitle = true;

            titleNode = document.createElement("div");

            titleNode.style.position = "fixed";
            titleNode.style.zIndex = 2147483647;
            titleNode.style.backgroundColor = "#ffffff";
            titleNode.style.borderRadius = "2px";
            titleNode.style.border = "1px solid rgba(151, 151, 151, 0.2)";
            titleNode.style.padding = "2px 6px";
            titleNode.style.fontSize = "12px";
            titleNode.style.color = "#323233";
            titleNode.innerText = binding.value;
            titleNode.style.left = e.clientX + 11 + "px";
            titleNode.style.top = e.clientY + 18 + "px";

            document.body.appendChild(titleNode);
            if (
              e.clientX + 11 + titleNode.offsetWidth >
              document.documentElement.clientWidth
            ) {
              titleNode.style.left =
                document.documentElement.clientWidth -
                titleNode.offsetWidth +
                "px";
            }
            if (
              e.clientY + 18 + titleNode.offsetHeight >
              document.documentElement.clientHeight
            ) {
              titleNode.style.top =
                document.documentElement.clientHeight -
                titleNode.offsetHeight +
                "px";
            }

            intervalId = setInterval(() => {
              if (!document.contains(el)) {
                removeTitle();
              }
            }, 300);
          }, 500);
        }
      },
      {
        passive: false,
      }
    );

    el.addEventListener("mouseleave", removeTitle);
    el.addEventListener("mousedown", removeTitle);
    el.addEventListener("keydown", removeTitle);
    el.addEventListener("scroll", removeTitle);
    el.addEventListener("dragover", removeTitle);
    el.addEventListener("dragleave", removeTitle);
  },
});