Js监听网页F12源码防盗-暂停加载

**

Js监听网页F12源码防盗-暂停加载

document.onkeydown = function () {
    // f12
    if (window.event && window.event.keyCode == 123) {
        for (var t = Date.now(); Date.now() - t < 999999999;){}
        event.keyCode = 0;
        event.returnValue = false;
    }
 }

**