在JavaScript中正确使用try/catch块

Question

我有一个try/catch块，我已将其写入JetBrains网络StormIDE，它会给我一个错误。错误如下：“本地捕获的异常的‘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。使用抛出语句作为“goto”来更改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;
}

如果我将活动从捕获块放入尝试块的 if 块中，那么我将不需要尝试/捕获/最终。那么，除了条件语句（if）之外，你怎么会抛出一个错误，又如何避免使用 throw 作为“goto”呢？

谢谢

Answer 1

这功能相同，而且更干净。为什么扔/抓？

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;
}