How can I validate JSON data using a schema?

How can I validate JSON data using a schema?

You can validate JSON data using a schema by utilizing libraries like Ajv or Joi in JavaScript. Would you like a code example?

Yes, please provide a code example using Ajv.

Sure! Here's a simple example:

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

const schema = {
  type: 'object',
  properties: {
    name: { type: 'string' },
    age: { type: 'integer' }
  },
  required: ['name', 'age']
};

const data = { name: 'John', age: 30 };
const validate = ajv.compile(schema);
const valid = validate(data);

if (!valid) console.log(validate.errors);
else console.log('JSON is valid!');

This code checks if the data object conforms to the defined schema. Let me know if you need further assistance!

What if the JSON data doesn't match the schema?

If the JSON data doesn't match the schema, the validate.errors array will contain details about the validation errors, such as which properties are missing or have the wrong type.