Question

我有一个try / catch块，我已经写入了JetBrains Webstorm IDE，它给了我一个错误。错误内容如下：“本地捕获异常'抛出'/此检查报告任何JavaScript 抛出语句的实例，其异常总是通过包含 try 语句来捕获。使用< strong> throw 语句作为'goto'来改变本地控制流可能会令人困惑。“

try {
    var invoice = parseInt(localStorage[0]);
    if (isNaN(invoice)) {
        console.warn("invoice NaN; let's fix that...");
        throw "executing catch";
    }
}
catch (e) {
    console.log(e);
    this.test();
    invoice = 1;
}
finally {
    localStorage[invoice] = JSON.stringify(Ticket);
    console.log("localStorage[" + invoice + '] : ' + localStorage[invoice]);
    localStorage[0] = parseInt(localStorage[0]) + 1;
}

如果我将来自catch块的活动放入try块的if块，那么我将不需要try / catch / finally。那么除了使用条件语句（if）之外，你还会抛出一个错误，以及如何避免将throw用作“goto”？

谢谢！

Answer 1

这个功能相同，更清洁。为什么要抛出/抓住？

try {
    var invoice = parseInt(localStorage[0]);
    if(isNaN(invoice)){
        console.warn("invoice NaN; let's fix that...");
        console.log("executing catch");   // not really needed
        this.test();
        invoice = 1;
    }
} finally {
    localStorage[invoice] = JSON.stringify(Ticket);
    console.log("localStorage[" + invoice + '] : ' + localStorage[invoice]);
    localStorage[0] = parseInt(localStorage[0]) + 1;
}

在JavaScript中正确使用try / catch块

1 个答案: