ES6 - 带 Break 的标签

示例

outerloop: // 这是标签名称
for (var i = 0; i < 5; i++) {
    console.log("Outerloop: " + i);
    innerloop:
    for (var j = 0; j < 5; j++){
        if (j > 3 ) break ; // 退出最内层循环
        if (i == 2) break innerloop; // 执行相同操作
        if (i == 4) break outerloop; // 退出外层循环
        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