noSelfCompare

诊断类别：lint/suspicious/noSelfCompare

¥Diagnostic Category: lint/suspicious/noSelfCompare

JavaScript (and super languages)

自从：v1.0.0

¥Since: v1.0.0

来源：

¥Sources:

与以下相同：no-self-compare

¥Same as: no-self-compare
与以下相同：eq_op

¥Same as: eq_op

禁止在双方完全相同的情况下进行比较。

¥Disallow comparisons where both sides are exactly the same.

在 CI 环境中使用的命令。它会让读者感到困惑，并可能导致运行时错误。

¥Comparing a variable against itself is usually an error, either a typo or refactoring error. It is confusing to the reader and may potentially introduce a runtime error.

唯一需要将变量与自身进行比较的情况是测试 NaN 时。但是，对于该用例，使用 typeof x === 'number' && Number.isNaN(x) 比让代码的读者确定自我比较的意图更为合适。

¥The only time you would compare a variable against itself is when you are testing for NaN. However, it is far more appropriate to use typeof x === 'number' && Number.isNaN(x) for that use case rather than leaving the reader of the code to determine the intent of self comparison.

示例

¥Examples

无效

¥Invalid

if (x === x) {}

code-block.js:1:5 lint/suspicious/noSelfCompare ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Comparing to itself is potentially pointless.
  
  > 1 │ if (x === x) {}
      │     ^^^^^^^
    2 │

if (a.b.c() !== a.b .c()) {}

code-block.js:1:5 lint/suspicious/noSelfCompare ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Comparing to itself is potentially pointless.
  
  > 1 │ if (a.b.c() !== a.b .c()) {}
      │     ^^^^^^^^^^^^^^^^^^^^
    2 │

noSelfCompare

示例

无效

相关链接