eslint/docs/src/rules/no-compare-neg-zero.md

   1 ---
   2 title: no-compare-neg-zero
   3 layout: doc
   4 rule_type: problem
   5 ---
   6
   7
   8
   9 ## Rule Details
  10
  11 The rule should warn against code that tries to compare against `-0`, since that will not work as intended. That is, code like `x === -0` will pass for both `+0` and `-0`. The author probably intended `Object.is(x, -0)`.
  12
  13 Examples of **incorrect** code for this rule:
  14
  15 ::: incorrect
  16
  17 ```js
  18 /* eslint no-compare-neg-zero: "error" */
  19
  20 if (x === -0) {
  21     // doSomething()...
  22 }
  23 ```
  24
  25 :::
  26
  27 Examples of **correct** code for this rule:
  28
  29 ::: correct
  30
  31 ```js
  32 /* eslint no-compare-neg-zero: "error" */
  33
  34 if (x === 0) {
  35     // doSomething()...
  36 }
  37 ```
  38
  39 :::
  40
  41 ::: correct
  42
  43 ```js
  44 /* eslint no-compare-neg-zero: "error" */
  45
  46 if (Object.is(x, -0)) {
  47     // doSomething()...
  48 }
  49 ```
  50
  51 :::