Add Short Circuit Concurrently When Process Fails as a JavaScript TIL

javascript/short-circuit-concurrently-when-process-fails.md

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+# Short Circuit Concurrently When Process Fails
+
+In [Run Multiple Node Scripts
+Concurrently](run-multiple-node-scripts-concurrently.md), I showed how we can
+get all the essential processes of our web app running concurrently in
+development using the `concurrently` package.
+
+But what happens when there is an error and one of them exits early instead of
+continuing to run?
+
+Well, the rest of the processes under the `concurrently` umbrella continue to
+run as if nothing has happened. In fact, if there is enough output, you might
+even miss that that one process failed since the error gets quickly pushed off
+the screen.
+
+If we need every process running for our app to work, then it would be better
+to have the whole set of concurrent processes short circuit and exit early if
+one fails. We can do that by giving `concurrently` the `--kill-others-on-fail`
+flag.
+
+```json
+{
+  "scripts": {
+    "dev": "concurrently --kill-others-on-fail \"npm:dev:*\"",
+    "dev:next": "next dev",
+    "dev:inngest": "pnpx inngest-cli@latest dev",
+    "dev:mailhog": "mailhog",
+  }
+}
+```
+
+See the [Usage
+section](https://github.com/open-cli-tools/concurrently?tab=readme-ov-file#usage)
+of the docs for more details.