标签与休息（Label with Break）

标签可以与断点一起使用并继续更精确地控制流量。

例子 (Example)

outerloop: // This is the label name  
for (var i = 0; i < 5; i++) {  
   console.log("Outerloop: " + i);  
   innerloop:  
   for (var j = 0; j<5; j++) {  
      if (j>3 ) break; 
      // Quit the innermost loop  
      if (i == 2) break innerloop; 
      // Do the same thing  
      if (i == 4) break outerloop; // Quit the outer loop  
      console.log("Innerloop: " + j);  
   }  
}

成功执行上述代码后，将显示以下输出。

Outerloop: 0 
Innerloop: 0 
Innerloop: 1 
Innerloop: 2 
Innerloop: 3 
Outerloop: 1 
Innerloop: 0 
Innerloop: 1 
Innerloop: 2 
Innerloop: 3 
Outerloop: 2 
Outerloop: 3 
Innerloop: 0 
Innerloop: 1 
Innerloop: 2 
Innerloop: 3 
Outerloop: 4