noUnreachable

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/correctness/noUnreachable

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

¥This rule is recommended, which means is enabled by default.
此规则没有修复方案。

¥This rule doesn’t have a fix.
此规则的默认严重级别为 error。

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

¥Sources:
- 与 no-unreachable 相同
  
  ¥Same as no-unreachable

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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      "correctness": {
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        "noUnreachable": "error"
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      }
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    }
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  }
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}

描述

¥Description

禁止无法访问的代码

¥Disallow unreachable code

示例

¥Examples

无效

¥Invalid

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function example() {
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    return;
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    neverCalled();
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}

code-block.js:3:5 lint/correctness/noUnreachable ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ This code will never be reached …
  
    1 │ function example() {
    2 │     return;
  > 3 │     neverCalled();
      │     ^^^^^^^^^^^^^^
    4 │ }
    5 │ 
  
  ℹ … because this statement will return from the function beforehand
  
    1 │ function example() {
  > 2 │     return;
      │     ^^^^^^^
    3 │     neverCalled();
    4 │ }

1
function example() {
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    for(let i = 0; i < 10; ++i) {
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        break;
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    }
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}

code-block.js:2:28 lint/correctness/noUnreachable ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ This code will never be reached …
  
    1 │ function example() {
  > 2 │     for(let i = 0; i < 10; ++i) {
      │                            ^^^
    3 │         break;
    4 │     }
  
  ℹ … because this statement will break the flow of the code beforehand
  
    1 │ function example() {
    2 │     for(let i = 0; i < 10; ++i) {
  > 3 │         break;
      │         ^^^^^^
    4 │     }
    5 │ }

1
function example() {
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    for(const key in value) {
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        continue;
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        neverCalled();
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    }
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}

code-block.js:4:9 lint/correctness/noUnreachable ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ This code will never be reached …
  
    2 │     for(const key in value) {
    3 │         continue;
  > 4 │         neverCalled();
      │         ^^^^^^^^^^^^^^
    5 │     }
    6 │ }
  
  ℹ … because this statement will continue the loop beforehand
  
    1 │ function example() {
    2 │     for(const key in value) {
  > 3 │         continue;
      │         ^^^^^^^^^
    4 │         neverCalled();
    5 │     }

noUnreachable

摘要

如何配置

描述

示例

无效

相关链接