esbuild-plugin-jsonschema

Compile and pack JSON schema definitions on import using esbuild

Installation

The package is released to npm as @offen/esbuild-plugin-jsonschema:

npm install @offen/esbuild-plugin-jsonschema -D

Usage

In the default configuration, the transform is applied to all files with a .schema or .schema.json extension. The transformed module will export the packed AJV validate function.

In your application:

const validateFoo = require('./foo.schema')

const ok = validateFoo({ foo: true })
if (!ok) {
  console.log(validateFoo.errors)
  throw new Error('Foo did not validate')
}

When bundling:

const esbuild = require('esbuild')
const jsonschemaPlugin = require('@offen/esbuild-plugin-jsonschema')

esbuild.build({
  entryPoints: ['app.js'],
  bundle: true,
  plugins: [jsonschemaPlugin()],
  outdir: './public'
})

Defining schemas

Schemas are expected to be defined in JSON format and saved as .schema files:

{
  "type": "string",
  "maxLength": 128
}

Options

The transform accepts the following options as its 2nd arguments:

secure

By default, this plugin only compiles "secure" schemas. This can be disabled by passing secure: false to the transform.

filter

By default, files with a .schema or a .schema.json extension are compiled. If you have different requirements you can pass a Regexp to filter for the plugin to use.

addFormats

Includes ajv-formats. Default true.

ajvOptions

Custom options to be passed to Ajv constructor.

Releasing a new version

New versions can be released using npm version <patch|minor|major>. Make sure you are authenticated against the @offen scope with npm.

License

Copyright 2021 Frederik Ring - Available under the MIT License