javascript - 提早退出功能？(Early exit from function?)

Question

I have a function:

(我有一个功能：)

function myfunction() {
  if (a == 'stop')  // How can I stop the function here?
}

Is there something like exit() in JavaScript?

(在JavaScript中有类似exit()东西吗？)

  ask by Simon translate from so

Answer 1

You can just use return .

(你可以使用return 。)

function myfunction() {
     if(a == 'stop') 
         return;
}

This will send a return value of undefined to whatever called the function.

(这将发送一个undefined的返回值到任何调用函数。)

var x = myfunction();

console.log( x );  // console shows undefined

Of course, you can specify a different return value.

(当然，您可以指定不同的返回值。)

Whatever value is returned will be logged to the console using the above example.

(无论返回什么值，都将使用上面的示例记录到控制台。)

return false;
return true;
return "some string";
return 12345;