noEqualsToNull

JavaScript (and super languages)

摘要

¥Summary

规则生效日期：v2.3.8

¥Rule available since: v2.3.8
诊断类别：lint/nursery/noEqualsToNull

¥Diagnostic Category: lint/nursery/noEqualsToNull
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 no-eq-null 相同
  
  ¥Same as no-eq-null

如何配置

¥How to configure

1
{
2
  "linter": {
3
    "rules": {
4
      "nursery": {
5
        "noEqualsToNull": "error"
6
      }
7
    }
8
  }
9
}

描述

¥Description

要求使用 === 或 !== 与 null 进行比较。

¥Require the use of === or !== for comparison with null.

将 == 或 != 与 null 进行比较可能会产生意外结果，因为在比较 null 和 undefined 时，表达式的计算结果为 true。

¥Comparing to null with == or != may have unintended results as the expression evaluates to true when comparing null to undefined.

示例

¥Examples

无效

¥Invalid

1
foo == null;

code-block.js:1:5 lint/nursery/noEqualsToNull  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ null comparison with == is disallowed.
  
  > 1 │ foo == null;
      │     ^^
    2 │ 
  
  ℹ Unsafe fix: Use === instead.
  
    1 │ foo·===·null;
      │       +

1
foo != null;

code-block.js:1:5 lint/nursery/noEqualsToNull  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ null comparison with != is disallowed.
  
  > 1 │ foo != null;
      │     ^^
    2 │ 
  
  ℹ Unsafe fix: Use !== instead.
  
    1 │ foo·!==·null;
      │       +

有效

¥Valid

1
foo === null;

1
foo !== null;

noEqualsToNull

摘要

如何配置

描述

示例

无效

有效

相关链接