ajv

• ajv：https://ajv.js.org/
• json-schema： https://json-schema.org/

const Ajv = require("ajv")
const ajv = new Ajv() // options can be passed, e.g. {allErrors: true}
const schema = {
  type: "object",
  properties: {
    foo: { type: "integer" },
    bar: { type: "string" }
  },
  required: ["foo"],
  additionalProperties: false
}
const validate = ajv.compile(schema)
const data = {
  foo: "1",
  bar: "abc"
}
const valid = validate(data)
if (!valid) console.log(validate.errors)

// 如果错了
[
  {
    instancePath: '/foo',
    schemaPath: '#/properties/foo/type',
    keyword: 'type',
    params: { type: 'integer' },
    message: 'must be integer'
  }
]

format

https://ajv.js.org/guide/formats.html

String formats

还可以自定义

ajv.addFormat("byte", {
  type: "number",
  validate: (x) => x >= 0 && x <= 255 && x % 1 == 0,
})

keyword

ajv.addKeyWord("test", {
  validate: (schema,data) {  //schema是关键字的值，data是关键字所在的key
        if(schema === true) return true
        else return schema.length === 6
    }
})

https://ajv.js.org/packages/ajv-i18n.html

https://ajv.js.org/packages/ajv-errors.html