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29 lines
1011 B
Markdown
29 lines
1011 B
Markdown
# Pre And Post Hooks For Yarn Scripts
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In [yarn](https://classic.yarnpkg.com/) v1, there is a special syntax for
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script names that allows you to define pre and post hooks.
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For instance, if you have a `build` script, you can define a `prebuild` and/or
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a `postbuild` script as well. Then, anytime you invoke `yarn build`, the
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`prebuild` script will be automatically run before `build` and the `postbuild`
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script be automatically run after `build`.
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This `pre{script}` and `post{script}` syntax works for any script.
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```json
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{
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"scripts": {
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"predeploy": "node pre-deploy-steps"
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"deploy": "my-framework deploy",
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"postdeploy": "node post-deploy-steps"
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}
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}
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```
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This syntax may lead to unexpected script invocations. For instance, a
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`preserve` script will run ahead of a `serve` script even though those were
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probably intended to be unrelated scripts. This is, in part, why this syntax is
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no longer support in yarn v2.
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[source](https://classic.yarnpkg.com/lang/en/docs/cli/run/#toc-yarn-run-script)
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