Deno v1.5.0stable Released Oct 27, 2020
โš ๏ธ Breaking Change Impact Score: 7/10

Deno v1.5.0 โ€” Release Notes & Engineering Impact

Source available โ€” automated, not human-reviewed

Component: deno ยท Channel: stable. Automated analysis, not a compatibility certification. How this works.

Analysis updated: 2026-11-01.

Breaking-change evidence from the source

  • - BREAKING: Enable isolatedModules by default (#8050)
Read the original context โ†—
Source flags breaking changes โ€” review applicability
๐Ÿ“„ .MD
โšก Executive Summary (TL;DR)

Deno v1.5.0. Source highlight: BREAKING: Enable isolatedModules by default (#8050)

Who Does This Impact? (Role-Based Analysis)

๐Ÿ’ป Software Engineers & Devs

Check the source notes against the package and APIs you use before upgrading.

๐Ÿ“Š Product & Engineering Leads

Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.

โš™๏ธ DevOps & Security

Verify the target version, runtime requirements and rollback procedure in the official documentation.

โš ๏ธ Breaking Changes & Deprecations (1)

  • - BREAKING: Enable isolatedModules by default (#8050)

โœจ New Features & Capabilities (6)

  • feat(bundle): Add support for --no-check (#8023)
  • feat(console): Inspect with colors regardless of Deno.noColor (#7778)
  • feat(doc): Support --import-map flag (#7821)
  • feat(fmt): Make --ignore flag stable (#7922)
  • feat(install): Add missing flags for deno install (#7601)
  • feat(repl): Add regex based syntax highlighter (#7811)

๐Ÿ”ง Bug Fixes & Patches (6)

  • fix(console): Fix the test cases of function inspections (#7965)
  • fix(console): Only inspect getters with option (#7830)
  • fix(core): Indicate exceptions in promises (#8124)
  • fix(core): Top Level Await module execution (#7946)
  • fix(op_crates/fetch): Body.body should be stream of Uint8Array (#8030)
  • fix(op_crates/fetch): Ensure Request.method is a string (#8100)
๐Ÿ“„ View Raw Release Notes (Original Developer Log)
### 1.5.0 / 2020.10.27 - BREAKING: Enable isolatedModules by default (#8050) - feat(bundle): Add support for --no-check (#8023) - feat(console): Inspect with colors regardless of Deno.noColor (#7778) - feat(doc): Support --import-map flag (#7821) - feat(fmt): Make --ignore flag stable (#7922) - feat(install): Add missing flags for deno install (#7601) - feat(repl): Add regex based syntax highlighter (#7811) - feat(repl): Add tab completion (#7827) - feat(test): Pass script args to test command (#8121) - feat(unstable): Add Deno.sleepSync() (#7974) - feat(unstable): Add Deno.systemCpuInfo() (#7774) - feat: Add alert, confirm, and prompt (#7507) - feat: Add types for WeakRef/FinalizationRegistry (#8056) - feat: Stabilize Deno.fsync and Deno.fdatasync (#8038) - fix(console): Fix the test cases of function inspections (#7965) - fix(console): Only inspect getters with option (#7830) - fix(core): Indicate exceptions in promises (#8124) - fix(core): Top Level Await module execution (#7946) - fix(op_crates/fetch): Body.body should be stream of Uint8Array (#8030) - fix(op_crates/fetch): Ensure Request.method is a string (#8100) - fix(op_crates/web): Better TextEncoder error message (#8005) - fix(op_crates/web): Expose event properties in console output (#8103) - fix(op_crates/web): TextEncoder should throw RangeError (#8039) - fix(op_crates/web): URL.pathname backslash replacement (#7937) - fix(repl): Ignore pair matching inside literals (#8037) - fix(repl): Keyboard interrupt should continue (#7960) - fix(repl): Unterminated string literal should invalidate (#7896) - fix(repl): Write all results to stdout (#7893) - fix(rt/main): Add global interface objects (#7875) - fix(rt/performance): Check for object props in startOrMeasureOptions (#7884) - fix(rt/websockets): Only add Sec-WebSocket-Protocol if not empty (#7936) - fix(test): Return error when awaiting unresolved promise (#7968) - fix: Do not throw on empty typescript files (#8143) - fix: Fix inspection of Function (#7930) - fix: Handle URL paths in Deno.mkdir() (#8140) - fix: Handling of relative importmaps while using watch (#7950) - fix: Print error stacks from the origin Worker (#7987) - fix: Restore permission check on workers (#8123) - fix: Use -rw-r--r-- for cache files (#8132) - fix: Use rid getter for stdio (#8014) - fix: handle roots with extensions that don't match media type (#8114) - refactor(core): more control over isolate creation (#8000) - refactor: New TSC infrastructure (#7996, #7981, #7892) - refactor: Rename --importmap to --import-map (#7032) - refactor: Rewrite Deno.transpileOnly() to use SWC (#8090) - upgrade: deno_doc, deno_lint, dprint, swc (#8009, #8077) - upgrade: rusty_v8 and v8 8.7.220.3 (#8017) Changes in std version 0.75.0: - feat(std/fs/node): Add more APIs (#7921) - feat(std/path): Add toFileUrl() (#7971) - feat(std/testing): Add assertExists assertion (#7874) - feat(std/testing): Add assertObjectMatch assertion (#8001) - fix(std/http): Path traversal in file_server.ts (#8134) - fix(std/toml): Parsing inline arrays of inline tables (#7902) - fix(std/encoding): base64 properly encodes mbc and handles Uint8Arrays (#7807) - fix(std/http/file_server): File server should ignore query params (#8116) - fix(std/node): Buffer.copy doesn't work as expected (#8125) - fix(std/wasi): Disallow path_open outside of pre-opened dirfd (#8078) - refactor(std/testing): Rename assert_Contains to assert_Includes (#7951) ### Install / Upgrade **Using Deno:** ```sh deno upgrade --version 1.5.0 ``` **With Shell:** ```sh curl -fsSL https://deno.land/x/install/install.sh | sh -s v1.5.0 ``` **With PowerShell:** ```powershell $v="1.5.0"; iwr https://deno.land/x/install/install.ps1 -useb | iex ```