Sourced from concurrently's releases.

v9.0.0

💥 Breaking Changes

• Dropped support for Node.js < 18.0.0. Older Node.js version have reached end-of-life, and certain features require new-ish JS APIs.

• The concurrently and default exports are now the same - #399 It's reasonable to expect that import { concurrently } from 'concurrently' would work the same as import concurrently from 'concurrently', however this has not been the case. The former used to be an unconfigured version of concurrently, lacking all features that you'd get from the CLI, which was seen as a "footgun". Both are now the same function.

  If you'd like to access the unconfigured function, use import { createConcurrently } from 'concurrently' instead.

✨ New Features

• Exponential back-off support for process restarting - #265, #462 Use --restart-after exponential. Restarts happen at 2^N seconds.
• Add prefix padding via new --pad-prefix flag - #166, #417, #495
• Specify teardown commands via new --teardown flag - #472, #500
• Expand node:<script> commands to node --run <script> - #475
• [API only] Inter-Process Communication (ipc) - #498
• [API only] Make it possible to use no colors at all - #466
• [API only] Add a state field to Command - #455

🐛 Bug Fixes

• Fix importing concurrently in ESM package - #454, #456, #494
• Make sure concurrently doesn't resolve when manually restarting commands through API - #463, #464
• Abort commands not running when max processes < N - #433, #452, #460
• Fix warning coming from spawn-command when running in Node 22 - #407, #477, #479, #492
• Make --raw and --hide compatible - #394, #486
• Ensure prefix is written when logging without a trailing LF - #467

Other Changes

• --help no longer shows examples due to there being too many. Refer to https://github.com/open-cli-tools/concurrently/tree/v9.0.0/docs instead, or to the node_modules/concurrently/docs directory in your project.
• Improve examples of --passthrough-arguments - #490
• Replace date-fns with hand-rolled date formatting - #436, #443 This should make installing concurrently faster.

New Contributors

• @​odeadglaz made their first contribution in open-cli-tools/concurrently#464
• @​mitchhentgesspotify made their first contribution in open-cli-tools/concurrently#474
• @​mark-monteiro made their first contribution in open-cli-tools/concurrently#480
• @​PoQuatre made their first contribution in open-cli-tools/concurrently#486

Full Changelog: open-cli-tools/concurrently@v8.2.2...v9.0.0

• a7a5894 9.0.0
• 758ee7f tests: update smoke tests lockfile
• 710ee55 Replace date-fns for hand-rolled date formatting
• fe7b69c deps: update @​types/node to 18.x.x too
• fd2d140 Bump minimum Node version to 18
• 37f98b2 deps: update several dev dependencies
• 1b5df3a deps: update everything eslint
• 7fc4803 Make it possible to use no colors at all through API
• f4fb4f7 bin: fix SIGINT test on Windows
• bd6ac58 bin: fix tests failing due to compilation to different dir
• Additional commits viewable in compare view

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