xgqfrms™, xgqfrms® : xgqfrms's offical website of GitHub!

如何使用 js 检测控制台被用户打开了

js

solutions

1. 监听 F12 事件

2. 监听键盘快捷键组合

Ctrl + Shift + I

Option + Command + I

3. Object.toString()

如果控制台输出的是对象，则保留对象的引用，每次打开开发者工具的时候都会重新调用一下对象的 toString()方法将返回结果打印到控制台（console tab）上。

4. 监听 window 的纵横比的变化

5. debugger 断点

"use strict";

/**
 *
 * @author xgqfrms
 * @license MIT
 * @copyright xgqfrms
 * @created 2020-10-01
 * @modified
 *
 * @description
 * @difficulty Easy Medium Hard
 * @complexity O(n)
 * @augments
 * @example
 * @link
 * @solutions
 *
 * @best_solutions
 *
 */

// const log = console.log;

function FBIWarning() {
  console.warn(`控制台被打开了`);
  console.error(`控制台被打开了`);
}

// ??? !function
!function () {
  const id = setInterval(() => {
    const before = new Date().getTime();
    debugger;
    const after = new Date().getTime();
    if (Math.abs(after - before) > 100) {
      FBIWarning();
      clearInterval(id)
    }
  }, 1000);
}();

6. Proxy 拦截 log 执行

7. 数据劫持

"use strict";

/**
 *
 * @author xgqfrms
 * @license MIT
 * @copyright xgqfrms
 * @created 2020-10-01
 * @modified
 *
 * @description
 * @difficulty Easy Medium Hard
 * @complexity O(n)
 * @augments
 * @example
 * @link
 * @solutions
 *
 * @best_solutions
 *
 */

// const log = console.log;

let times = 1;

var abc = document.createElement('div');

Object.defineProperty(abc, `id`, {
  // 数据劫持
  get: function () {
    // console.log(`控制台被打开了`, x);
    console.warn(`控制台被打开了`, times);
    console.error(`控制台被打开了`, times);
    times++;
  },
  // others
});

console.log(abc);

应用场景

禁用右键菜单

防止执行外包的 js, 关闭当前页面

重定向

禁用复制

refs

https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent

快捷键

https://www.cnblogs.com/xgqfrms/tag/快捷键/

    let isCtrl = false;
    document.addEventListener("keyup", () => {
        //
    });
    document.addEventListener("keyup", function(e) {
        let key = e.which || e.keyCode;
        // console.log(`keyup & e =`, e);
        // console.log(`e.keyCode =`, e.keyCode);
        // console.log(`e.which =`, e.keyCode);
        // console.log(`key =`, key);
        if(e.which === 17) {
            // init
            isCtrl = false;
        }
    });
    document.addEventListener("keydown", function(e) {
        let key = e.which || e.keyCode;
        console.log(`keydown & e =`, e);
        // console.log(`e.keyCode =`, e.keyCode);
        // console.log(`e.which =`, e.keyCode);
        // console.log(`key =`, key);
        if(e.which === 17) {
            isCtrl = true;
        }
        if(e.which === 83 && isCtrl === true) {
            console.log(`you pressed Ctrl + S`);
        }
        if(e.which === 68 && isCtrl === true) {
            console.log(`you pressed Ctrl + D`);
        }
        if(e.which === 70 && isCtrl === true) {
            console.log(`you pressed Ctrl + F`);
        }
        if(e.which === 88 && isCtrl === true) {
            console.log(`you pressed Ctrl + X`);
        }
    });
    // document.onkeyup = function(e) {
    //     if(e.which === 17) {
    //         isCtrl = false;
    //     }
    // }
    // document.onkeydown = function(e) {
    //     if(e.which === 17) {
    //         isCtrl = true;
    //     }
    //     if(e.which === 83 && isCtrl === true) {
    //         // alert('Keyboard shortcuts are cool!');
    //         return false;
    //     }
    // }

---

---

©xgqfrms 2012-2020

www.cnblogs.com 发布文章使用：只允许注册用户才可以访问！

---