View the full release blog post here.

1.21.0 / 2022.04.20

• feat(bench): update API, new console reporter (#14305)
• feat(cli/fmt): ignore .git folder when formatting files (#14138)
• feat(core): Add initial support for realms (#14019)
• feat(ext/net): Deno.upgradeHttp handles unix connections (#13987)
• feat(ext/web): add globalThis.reportError() (#13799)
• feat(repl): Don't type check when importing modules (#14112)
• feat(repl): add --eval-file flag to execute a script file on startup (#14247)
• feat(repl): add global clear() function (#14332)
• feat(runtime): two-tier subprocess API (#11618)
• feat(test): Add name, origin and parent to Deno.TestContext (#14007)
• feat(test): Improve testing report output (#14255)
• feat(test): format user code output (#14271)
• feat(test): skip internal stack frames for errors (#14302)
• feat(test): use structured data for JavaScript errors in tests (#14287)
• feat: Add "deno check" subcommand for type checking (#14072)
• feat: Add DENO_NO_PROMPT variable (#14209)
• feat: Better formatting for AggregateError (#14285)
• fix(cli/emit): Check JS roots with // [@ts-check](https://github.com/ts-check) (#14090)
• fix(cli/tools/test): Prefix test module paths with ./ (#14301)
• fix(fmt): regression where some short if stmt headers being split on multiple lines (#14292)
• fix(permissions): fallback to denied access if the permission prompt fails (#14235)
• fix: --watch was losing items (#14317)
• fix: panic when trying to pledge permissions before restoring previous pledge (#14306)
• perf(fmt/lint): incremental formatting and linting (#14314)
• perf(runtime): bypass tokio file and bump op buffer size to 64K (#14319)
• perf: move Deno.writeTextFile and like functions to Rust (#14221)
• upgrade: rusty_v8 0.42.0 (#14334)