带有函数的Wrapp

(function(){
alert('start')

return;
alert('no exec')
})

如果你不关心它是一个错误，可以这样写:

fail;

这将阻止您的主(全局)代码继续进行。 对调试/测试的某些方面很有用。

这段代码将停止当前窗口中所有javascript的执行:

(,);

例子

console.log('READY!'); setTimeout(()=>{ /* animation call */ div.className = "anim"; console.log('SET!'); setTimeout(()=>{ setTimeout(()=>{ console.log('this code will never be executed'); },1000); console.log('GO!'); /* BOMB */ for(;;); console.log('this code will never be executed'); },1000); },1000); #div { position: fixed; height: 1rem; width: 1rem; left: 0rem; top: 0rem; transition: all 5s; background: red; } /* this <div> will never reached the right bottom corner */ #div.anim { left: calc(100vw - 1rem); top: calc(100vh - 1rem); } <div id="div"></div>

如果你在脚本中使用任何未定义的函数，那么脚本将由于“Uncaught ReferenceError”而停止。我已经尝试了以下代码和执行的前两行。

我认为，这是停止剧本的最好方法。如果有任何其他方式，请评论我。我还想知道另一种最好最简单的方法。BTW，我没有得到退出或死亡内置函数在Javascript像PHP终止脚本。如果有人知道，请告诉我。

alert('Hello');

document.write('Hello User!!!');

die();  //Uncaught ReferenceError: die is not defined

alert('bye');

document.write('Bye User!!!');

"exit"函数通常退出程序或脚本，并以错误消息作为参数。例如php中的die(…)

die("sorry my fault, didn't mean to but now I am in byte nirvana")

在JS中等效的是用throw关键字发出错误信号，如下所示:

throw new Error();

你可以很容易地测试这个:

var m = 100;
throw '';
var x = 100;

x
>>>undefined
m
>>>100

If you're looking for a way to forcibly terminate execution of all Javascript on a page, I'm not sure there is an officially sanctioned way to do that - it seems like the kind of thing that might be a security risk (although to be honest, I can't think of how it would be off the top of my head). Normally in Javascript when you want your code to stop running, you just return from whatever function is executing. (The return statement is optional if it's the last thing in the function and the function shouldn't return a value) If there's some reason returning isn't good enough for you, you should probably edit more detail into the question as to why you think you need it and perhaps someone can offer an alternate solution.

注意，在实践中，大多数浏览器的Javascript解释器在遇到错误时会简单地停止运行当前脚本。所以你可以做一些事情，比如访问一个未设置变量的属性:

function exit() {
    p.blah();
}

它可能会中止脚本。但你不应该指望它，因为它根本不是标准的，而且它看起来真的是一个糟糕的做法。

编辑:好吧，也许这不是一个很好的答案Ólafur的光。尽管他链接到的die()函数基本上实现了我的第二段，即它只是抛出一个错误。