Migrate to oxlint and oxfmt v2

[kibertoad]

This preserves original formatting and style rules to a maximum extent possible, while introducing new ones and speeding up the check process dramatically.

[kibertoad]

@jaylinski I think I messed up my branch in the previous attempt a little bit, this should be the good clean one

[Copilot]

Pull request overview

This PR migrates the repository’s linting/formatting workflow from ESLint + Prettier to oxlint + oxfmt, updating configuration and reformatting affected code/docs to match the new tooling while aiming to preserve existing style rules.

Changes:

• Replace ESLint/Prettier tooling with oxlint/oxfmt (new configs, updated scripts, updated lint-staged).
• Remove per-directory ESLint config files and consolidate behavior via .oxlintrc.json overrides.
• Apply repo-wide formatting updates across TS typings, docs/markdown, HTML fixtures, and small JS modernizations.

Reviewed changes

Copilot reviewed 38 out of 41 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
types/test.ts	Formatting-only updates to TS type tests/examples.
types/index.d.ts	Formatting-only updates to published typings.
tests/integration/webpack-test/src/.eslintrc.js	Remove legacy ESLint config (now handled via oxlint).
tests/integration/webpack-test/package.json	JSON reordering to match formatter output.
tests/integration/webpack-babel-test/src/.eslintrc.js	Remove legacy ESLint config (now handled via oxlint).
tests/integration/webpack-babel-test/package.json	JSON reordering to match formatter output.
tests/integration/webpack-babel-test/.babelrc	Formatting normalization.
tests/integration/rollup-test/package.json	JSON reordering to match formatter output.
tests/integration/multi-nodejs-test/package.json	JSON reordering to match formatter output.
tests/integration/multi-nodejs-test/.eslintrc.js	Remove legacy ESLint config (now handled via oxlint).
tests/browser/.eslintrc.js	Remove legacy ESLint config (now handled via oxlint).
tests/bench/util/benchwarmer.js	Replace new Array().join() with String#repeat() equivalents.
tests/bench/throughput.js	Minor modern syntax (catch {}) / formatting changes.
tests/bench/.eslintrc.js	Remove legacy ESLint config (now handled via oxlint).
tasks/util/git.js	Minor modernization (startsWith) / formatting.
tasks/tests/.eslintrc.js	Remove legacy ESLint config (now handled via oxlint).
tasks/metrics.js	Minor modernization (startsWith) / formatting.
tasks/.eslintrc.js	Remove legacy ESLint config (now handled via oxlint).
spec/umd.html	HTML formatting updates (self-closing meta tags, indentation).
spec/umd-runtime.html	HTML formatting updates (self-closing meta tags, indentation).
spec/source-map.js	Minor modern syntax (catch {}) / formatting changes.
spec/partials.js	Small test simplification (undefined literal) / formatting.
spec/index.html	HTML formatting updates / line wrapping.
spec/.eslintrc.js	Remove legacy ESLint config (now handled via oxlint).
runtime.d.ts	Formatting normalization.
release-notes.md	Markdown formatting cleanup (blank line removal).
prettier.config.js	Remove Prettier config (replaced by .oxfmtrc.json).
package.json	Switch scripts/devDependencies from ESLint+Prettier to oxlint+oxfmt; update lint-staged.
lib/handlebars/compiler/code-gen.js	Add oxlint suppression for unused catch binding; keep existing logic.
lib/.eslintrc.js	Remove legacy ESLint config (now handled via oxlint).
docs/compiler-api.md	Markdown formatting cleanup (blank line removal).
README.md	Markdown formatting normalization (headings, lists, wrapping).
.prettierignore	Update ignore patterns (and document that oxfmt reads it).
.oxlintrc.json	New consolidated oxlint configuration with overrides and ignores.
.oxfmtrc.json	New oxfmt configuration matching prior formatting preferences.
.github/workflows/release.yml	YAML formatting normalization (quoting).
.github/dependabot.yml	YAML formatting normalization (quoting).
.git-blame-ignore-revs	Add revision to ignore blame for the formatting migration.
.eslintrc.js	Remove root ESLint config (replaced by .oxlintrc.json).
.eslintignore	Remove ESLint ignore file (replaced by .oxlintrc.json ignores).

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[Copilot]

.prettierignore still lists local/generated artifacts like .nyc_output and /handlebars-release.tgz, but .oxlintrc.json's ignorePatterns doesn't. If those artifacts exist locally (e.g., after running tests/packaging), oxlint may start linting them and produce unexpected failures/noise. Consider adding .nyc_output/ and handlebars-release.tgz (and any other generated artifacts you intend to ignore) to ignorePatterns to match the formatter ignore list and the previous .eslintignore behavior.

[jaylinski]

Nice PR! Makes linting/formatting faster and reduces dev-dependencies.

[jaylinski]

There is no more src-folder in the master-branch, please remove.

[jaylinski]

Why didn't you add this config to .oxfmtrc.json?

[jaylinski]

Thinking if we still need this plugin. We originally added it to avoid using new browser APIs that were not supported widely yet. I think it reads the browserslist-config below.

Maybe we can also check compatibility via a new build-tool?