noUselessCatch

JavaScript (and super languages)

摘要

¥Summary

规则生效日期：v1.0.0

¥Rule available since: v1.0.0
诊断类别：lint/complexity/noUselessCatch

¥Diagnostic Category: lint/complexity/noUselessCatch
此规则为推荐规则，默认启用。

¥This rule is recommended, which means is enabled by default.
此规则包含 unsafe 修复程序。

¥This rule has an unsafe fix.
此规则的默认严重级别为 information。

¥The default severity of this rule is information.
来源：

¥Sources:
- 与 no-useless-catch 相同
  
  ¥Same as no-useless-catch

如何配置

¥How to configure

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{
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  "linter": {
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    "rules": {
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      "complexity": {
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        "noUselessCatch": "error"
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      }
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    }
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  }
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}

描述

¥Description

禁止不必要的 catch 子句。

¥Disallow unnecessary catch clauses.

仅重新抛出原始错误的 catch 子句是多余的，并且对程序的运行时行为没有影响。这些冗余子句可能造成混乱和代码膨胀，因此最好禁止这些不必要的 catch 子句。

¥A catch clause that only rethrows the original error is redundant, and has no effect on the runtime behavior of the program. These redundant clauses can be a source of confusion and code bloat, so it’s better to disallow these unnecessary catch clauses.

示例

¥Examples

无效

¥Invalid

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try {
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    doSomething();
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} catch(e) {
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    throw e;
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}

code-block.js:4:5 lint/complexity/noUselessCatch ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ℹ The catch clause that only rethrows the original error is useless.
  
    2 │     doSomething();
    3 │ } catch(e) {
  > 4 │     throw e;
      │     ^^^^^^^^
    5 │ }
    6 │ 
  
  ℹ An unnecessary catch clause can be confusing.

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try {
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    doSomething();
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} catch(e) {
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    throw e;
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} finally {
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    doCleanUp();
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}

code-block.js:4:5 lint/complexity/noUselessCatch  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ℹ The catch clause that only rethrows the original error is useless.
  
    2 │     doSomething();
    3 │ } catch(e) {
  > 4 │     throw e;
      │     ^^^^^^^^
    5 │ } finally {
    6 │     doCleanUp();
  
  ℹ An unnecessary catch clause can be confusing.
  
  ℹ Unsafe fix: Remove the catch clause.
  
    1 1 │   try {
    2 2 │       doSomething();
    3   │ - }·catch(e)·{
    4   │ - ····throw·e;
    5   │ - }·finally·{
      3 │ + }·finally·{
    6 4 │       doCleanUp();
    7 5 │   }

有效

¥Valid

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try {
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    doSomething();
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} catch(e) {
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    doSomethingWhenCatch();
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    throw e;
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}

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try {
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    doSomething();
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} catch(e) {
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    handleError(e);
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}

1
try {
2
    doSomething();
3
} finally {
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    doCleanUp();
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}

noUselessCatch

摘要

如何配置

描述

示例

无效

有效

相关链接