noGlobalIsNan

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/suspicious/noGlobalIsNan

¥Diagnostic Category: lint/suspicious/noGlobalIsNan
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 warning。

¥The default severity of this rule is warning.

如何配置

¥How to configure

1
{
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  "linter": {
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    "rules": {
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      "suspicious": {
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        "noGlobalIsNan": "error"
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      }
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    }
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  }
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}

描述

¥Description

使用 Number.isNaN 而不是全局 isNaN。

¥Use Number.isNaN instead of global isNaN.

Number.isNaN() 和 isNaN() 没有相同的行为。当 isNaN() 的参数不是数字时，首先将值强制转换为数字。Number.isNaN() 不执行此强制。因此，这是一种更可靠的方法来测试值是否为 NaN。

¥Number.isNaN() and isNaN() do not have the same behavior. When the argument to isNaN() is not a number, the value is first coerced to a number. Number.isNaN() does not perform this coercion. Therefore, it is a more reliable way to test whether a value is NaN.

示例

¥Examples

无效

¥Invalid

1
isNaN({}); // true

code-block.js:1:1 lint/suspicious/noGlobalIsNan  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ⚠ isNaN is unsafe. It attempts a type coercion. Use Number.isNaN instead.
  
  > 1 │ isNaN({}); // true
      │ ^^^^^
    2 │ 
  
  ℹ See the MDN documentation for more details.
  
  ℹ Unsafe fix: Use Number.isNaN instead.
  
    1   │ - isNaN({});·//·true
      1 │ + Number.isNaN({});·//·true
    2 2 │

有效

¥Valid

1
Number.isNaN({}); // false

noGlobalIsNan

摘要

如何配置

描述

示例

无效

有效

相关链接