How can I use AJV for asynchronous validation?

How can I use AJV for asynchronous validation?

You can use AJV's validate method with a promise-based schema to handle asynchronous validation.

Can you give me an example of an async validation schema?

Sure! Here's a simple example:

const Ajv = require('ajv');
const ajv = new Ajv();

const schema = {
  type: 'object',
  properties: {
    email: { type: 'string', format: 'email' }
  },
  required: ['email']
};

const validate = ajv.compile(schema);

async function validateEmail(data) {
  const valid = await validate(data);
  if (!valid) console.log(validate.errors);
  return valid;
}

This schema validates an email format asynchronously.

What if I want to validate multiple fields asynchronously?

You can extend the schema to include more properties and use the same validate function. Just ensure all fields are defined in the schema.

Is there a way to customize error messages for async validation?

Yes, you can customize error messages in the schema using the errorMessage keyword in AJV.