support class static blocks (stage-4)

[aladdin-add]

What is the name of the syntax to implement?
class static blocks

Please provide the TC39 URL for the syntax proposal:
https://github.com/tc39/proposal-class-static-block

Please provide some example code for the new syntax:

// with static blocks:
class C {
  static x = ...;
  static y;
  static z;
  static {
    try {
      const obj = doSomethingWith(this.x);
      this.y = obj.y;
      this.z = obj.z;
    }
    catch {
      this.y = ...;
      this.z = ...;
    }
  }
}

Implementation Checklist

Please check off all items that have already been completed. Be sure to paste the pull request URLs next to each item so we can verify the work as done.

• Ecma262 update: Normative: Add class static initialization blocks tc39/ecma262#2440
• ESTree update: feat: move static blocks to es2022 estree/estree#254
• Acorn update: Support ES2022 class static blocks acornjs/acorn#1063
• eslint-visitor-keys update: Update: add StaticBlock eslint-visitor-keys#29, chore: upgrade eslint-visitor-keys for class static blocks #15277
• espree update: feat: support class static blocks espree#518
• eslint-scope update: feat!: support class static blocks eslint-scope#80, feat: update eslint-scope for class static blocks #15321
• eslint update:
  • Code Path Analysis feat: code path analysis for class static blocks #15282
  • Rules
    • block-scoped-var docs: add examples for block-scoped-var with class static blocks #15302
    • block-spacing feat: update block-spacing for class static blocks #15297
    • brace-style feat: update brace-style for class static blocks #15322
    • class-methods-use-this feat: update class-methods-use-this for class static blocks #15298
    • complexity feat: update the complexity rule for class static blocks #15328
    • indent feat: update the indent rule for class static blocks #15324
    • keyword-spacing feat: update keyword-spacing for class static blocks #15289
    • lines-around-comment feat: update lines-around-comment for class static blocks #15323
    • max-depth feat: update max-depth for class static blocks #15316
    • max-statements feat: update max-statements for class static blocks #15315
    • no-lone-blocks feat: update no-lone-blocks for class static blocks #15295
    • no-empty (or no-empty-function?) neither, possibly a new rule.
    • no-eval fix: update no-invalid-this and no-eval for class static blocks #15300
    • no-extra-semi feat: update no-extra-semi for class static blocks #15287
    • no-inner-declarations feat: update no-inner-declarations for class static blocks #15290
    • no-invalid-this fix: update no-invalid-this and no-eval for class static blocks #15300
    • no-redeclare feat: update no-redeclare for class static blocks #15313
    • no-unused-expressions docs: no-unused-expressions - class static blocks don't have directives #15283
    • no-use-before-define feat: update no-use-before-define for class static blocks #15312
    • one-var feat: update one-var for class static blocks #15317
    • padded-blocks feat: update padded-blocks for class static blocks #15333
    • padding-line-between-statements feat: update padding-line-between-statements for class static blocks #15318
    • prefer-const feat: update prefer-const for class static blocks #15325
    • semi feat: update semi rule for class static blocks #15286
    • semi-style fix: update semi-style for class static blocks #15309
    • strict docs: the strict rule does not apply to class static blocks #15314
    • vars-on-top fix: update vars-on-top for class static blocks #15306

Are you willing to submit a pull request to implement this syntax?
y

[nzakas]

This looks like it will need a new scope in eslint-scope and a new code path type.

[mdjermanovic]

This looks like it will need a new scope in eslint-scope and a new code path type.

Yes, I think the same.

[mdjermanovic]

I unchecked espree because it also re-exports visitor keys. I don't think we're using espree.VisitorKeys in ESLint, but espree itself would be incomplete without updating eslint-visitor-keys dependency.

[mdjermanovic]

I added an initial list of rules that should be updated. A couple of them may need only docs/tests update. Note that class static blocks do not have directive prologue.

[btmills]

All currently-known work to implement class static blocks just shipped in ESLint v8.3.0!