require("ajv-keywords")(ajv, ["transform"])

const schema = {
  type: "array",
  items: {
    type: "string",
    transform: ["trim", "toEnumCase"],
    enum: ["pH"],
  },
}

const data = ["ph", " Ph", "PH", "pH "]
ajv.validate(schema, data)
console.log(data) // ['pH','pH','pH','pH']

const ajv = new Ajv({
  keywords: [
    require("ajv-keywords/dist/definitions/typeof")(),
    require("ajv-keywords/dist/definitions/instanceof")(),
    // select exports an array of 3 definitions - see "select" in docs
    ...require("ajv-keywords/dist/definitions/select")(opts),
  ],
})

require("ajv-keywords")(ajv, "transform")

const schema = {
  type: "array",
  items: {
    type: "string",
    transform: ["trim", "toLowerCase"],
  },
}

const data = ["  MixCase  "]
ajv.validate(schema, data)
console.log(data) // ['mixcase']

const ajv = new Ajv({keywords: require("ajv-keywords/dist/definitions")(opts)})

const envSchema = require('env-schema')
const Ajv = require('ajv')

const schema = {
  type: 'object',
  properties: {
    names: {
      type: 'string',
      separator: ','
    }
  }
}

const config = envSchema({
  schema: schema,
  data: data,
  dotenv: true,
  ajv: new Ajv({
    allErrors: true,
    removeAdditional: true,
    useDefaults: true,
    coerceTypes: true,
    allowUnionTypes: true,
    keywords: [envSchema.keywords.separator]
  })
})

console.log(config)
// output: { PORT: 3000 }