eslint/docs/rules/block-spacing.md

   1 # Disallow or enforce spaces inside of blocks after opening block and before closing block (block-spacing)
   2
   3 ## Rule Details
   4
   5 This rule enforces consistent spacing inside an open block token and the next token on the same line. This rule also enforces consistent spacing inside a close block token and previous token on the same line.
   6
   7 ## Options
   8
   9 This rule has a string option:
  10
  11 * `"always"` (default) requires one or more spaces
  12 * `"never"` disallows spaces
  13
  14 ### always
  15
  16 Examples of **incorrect** code for this rule with the default `"always"` option:
  17
  18 ```js
  19 /*eslint block-spacing: "error"*/
  20
  21 function foo() {return true;}
  22 if (foo) { bar = 0;}
  23 function baz() {let i = 0;
  24     return i;
  25 }
  26
  27 class C {
  28     static {this.bar = 0;}
  29 }
  30 ```
  31
  32 Examples of **correct** code for this rule with the default `"always"` option:
  33
  34 ```js
  35 /*eslint block-spacing: "error"*/
  36
  37 function foo() { return true; }
  38 if (foo) { bar = 0; }
  39
  40 class C {
  41     static { this.bar = 0; }
  42 }
  43 ```
  44
  45 ### never
  46
  47 Examples of **incorrect** code for this rule with the `"never"` option:
  48
  49 ```js
  50 /*eslint block-spacing: ["error", "never"]*/
  51
  52 function foo() { return true; }
  53 if (foo) { bar = 0;}
  54
  55 class C {
  56     static { this.bar = 0; }
  57 }
  58 ```
  59
  60 Examples of **correct** code for this rule with the `"never"` option:
  61
  62 ```js
  63 /*eslint block-spacing: ["error", "never"]*/
  64
  65 function foo() {return true;}
  66 if (foo) {bar = 0;}
  67
  68 class C {
  69     static {this.bar = 0;}
  70 }
  71 ```
  72
  73 ## When Not To Use It
  74
  75 If you don't want to be notified about spacing style inside of blocks, you can safely disable this rule.