Schema Utils

npm i schema-utils

{
  "type": "object",
  "properties": {
    // Options...
  },
  "additionalProperties": false
}

import schema from 'path/to/schema.json'
import validateOptions from 'schema-utils'

validateOptions(schema, options, 'Loader/Plugin Name')

{
  "type": "object",
  "properties": {
    "name": {
      "type": "string"
    },
    "test": {
      "anyOf": [
        { "type": "array" },
        { "type": "string" },
        { "instanceof": "RegExp" }
      ]
    },
    "transform": {
      "instanceof": "Function"
    },
    "sourceMap": {
      "type": "boolean"
    }
  },
  "additionalProperties": false
}

import { getOptions } from 'loader-utils'
import validateOptions from 'schema-utils'

import schema from 'path/to/schema.json'

function loader (src, map) {
  const options = getOptions(this) || {}

  validateOptions(schema, options, 'Loader Name')

  // Code...
}

import validateOptions from 'schema-utils'

import schema from 'path/to/schema.json'

class Plugin {
  constructor (options) {
    validateOptions(schema, options, 'Plugin Name')

    this.options = options
  }

  apply (compiler) {
    // Code...
  }
}