noGlobalIsNan

诊断类别：lint/suspicious/noGlobalIsNan

¥Diagnostic Category: lint/suspicious/noGlobalIsNan

JavaScript (and super languages)

自从：v1.0.0

¥Since: v1.0.0

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

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

Number.isNaN({}); // false

noGlobalIsNan

示例

无效

有效

相关链接