use-isnan
NOTE: this rule is part of the 
推荐 rule set.Enable full set in 
deno.json:{
  "lint": {
    "rules": {
      "tags": ["推荐"]
    }
  }
}Enable full set using the Deno CLI:
deno lint --rules-tags=推荐
This rule can be explictly included to or excluded from the rules present in the current tag by adding it to the 
include or exclude array in deno.json:{
  "lint": {
    "rules": {
      "include": ["use-isnan"],
      "exclude": ["use-isnan"]
    }
  }
}不允许与 NaN 进行比较。
因为 NaN 在 JavaScript 中是独特的,它不等于任何东西,包括它自己,所以与 NaN 的比较结果是令人困惑的:
NaN === NaN或NaN == NaN的结果为falseNaN !== NaN或NaN != NaN的结果为true
因此,这条规则要求使用 isNaN() 或 Number.isNaN() 来判断值是否为 NaN。
无效示例:
if (foo == NaN) {
  // ...
}
if (foo != NaN) {
  // ...
}
switch (NaN) {
  case foo:
    // ...
}
switch (foo) {
  case NaN:
    // ...
}
      
    有效示例:
if (isNaN(foo)) {
  // ...
}
if (!isNaN(foo)) {
  // ...
}