noStringCaseMismatch

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/noStringCaseMismatch

¥Diagnostic Category: lint/correctness/noStringCaseMismatch
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 error。

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

¥Sources:
- 与 match_str_case_mismatch 相同
  
  ¥Same as match_str_case_mismatch

如何配置

¥How to configure

1
{
2
  "linter": {
3
    "rules": {
4
      "correctness": {
5
        "noStringCaseMismatch": "error"
6
      }
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    }
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  }
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}

描述

¥Description

禁止比较使用不合规值修改字符串大小写的表达式。

¥Disallow comparison of expressions modifying the string case with non-compliant value.

示例

¥Examples

无效

¥Invalid

1
if (s.toUpperCase() === "Abc") {}

code-block.js:1:5 lint/correctness/noStringCaseMismatch  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ This expression always returns false.
  
  > 1 │ if (s.toUpperCase() === “Abc”) {}
      │     ^^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ This call convert the string to upper case
  
  > 1 │ if (s.toUpperCase() === “Abc”) {}
      │     ^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ … but this value is not in upper case
  
  > 1 │ if (s.toUpperCase() === “Abc”) {}
      │                         ^^^^^
    2 │ 
  
  ℹ Unsafe fix: Use upper case string value.
  
    1   │ - if·(s.toUpperCase()·===·“Abc”)·{}
      1 │ + if·(s.toUpperCase()·===·“ABC”)·{}
    2 2 │

1
while (s.toLowerCase() === "Abc") {}

code-block.js:1:8 lint/correctness/noStringCaseMismatch  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ This expression always returns false.
  
  > 1 │ while (s.toLowerCase() === “Abc”) {}
      │        ^^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ This call convert the string to lower case
  
  > 1 │ while (s.toLowerCase() === “Abc”) {}
      │        ^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ … but this value is not in lower case
  
  > 1 │ while (s.toLowerCase() === “Abc”) {}
      │                            ^^^^^
    2 │ 
  
  ℹ Unsafe fix: Use lower case string value.
  
    1   │ - while·(s.toLowerCase()·===·“Abc”)·{}
      1 │ + while·(s.toLowerCase()·===·“abc”)·{}
    2 2 │

有效

¥Valid

1
if (s.toUpperCase() === "ABC") {}
2
while (s.toLowerCase() === "abc") {}
3
for (;s.toLocaleLowerCase() === "ABC";) {}
4
while (s.toLocaleUpperCase() === "abc") {}
5
for (let s = "abc"; s === "abc"; s = s.toUpperCase()) {}

noStringCaseMismatch

摘要

如何配置

描述

示例

无效

有效

相关链接