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;