no-useless-catch
禁止不必要的 catch
子句
配置文件 中的
"extends": "eslint:recommended"
属性启用了该规则
只重新抛出原始错误的 catch
子句是多余的,对程序的运行时行为没有影响。这些多余的子句可能会造成混乱和代码膨胀,因此最好禁止这些不必要的 catch
子句。
规则详情
此规则报告 catch
子句,只有 throw
捕获错误。
此规则的错误代码示例:
/*eslint no-useless-catch: "error"*/
try {
doSomethingThatMightThrow();
} catch (e) {
throw e;
}
try {
doSomethingThatMightThrow();
} catch (e) {
throw e;
} finally {
cleanUp();
}
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/*eslint no-useless-catch: "error"*/
try {
doSomethingThatMightThrow();
} catch (e) {
doSomethingBeforeRethrow();
throw e;
}
try {
doSomethingThatMightThrow();
} catch (e) {
handleError(e);
}
try {
doSomethingThatMightThrow();
} finally {
cleanUp();
}
何时不使用
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