const ajv = new Ajv()
const validate = ajv.addSchema(defsSchema).compile(schema)
<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">class</span> <span class="token class-name">ajv</span>
<span class="token keyword">import</span> ajv
<span class="token keyword">const</span> ajv<span class="token operator">:</span> Ajv</code></pre>

const Ajv = require("ajv") // version >= v7.0.0
const ajv = new Ajv({code: {source: true}}) // this option is required to generate standalone code
const standaloneCode = require("ajv/dist/standalone").default

const schema = {
  $id: "https://example.com/object.json",
  type: "object",
  properties: {
    foo: {
      type: "string",
      pattern: "^[a-z]+$",
    },
  },
}

// 1. generate module with a single default export (CommonJS and ESM compatible):
const validate = ajv.compile(schema)
let moduleCode = standaloneCode(ajv, validate)

// 2. pass map of schema IDs to generate multiple exports,
// it avoids code duplication if schemas are mutually recursive or have some share elements:
let moduleCode = standaloneCode(ajv, {
  validateObject: "https://example.com/object.json",
})

// 3. or generate module with all schemas added to the instance (excluding meta-schemas),
// export names would use schema IDs (or keys passed to addSchema method):
let moduleCode = standaloneCode(ajv)

// now you can
// write module code to file
const fs = require("fs")
const path = require("path")
fs.writeFileSync(path.join(__dirname, "/validate.js"), moduleCode)

// ... or require module from string
const requireFromString = require("require-from-string")
const standaloneValidate = requireFromString(moduleCode) // for a single default export
<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token keyword">import</span> Ajv</code></pre>

ajv.addKeyword({
  keyword: "range",
  type: "number",
  compile([min, max], parentSchema) {
    return parentSchema.exclusiveRange === true
      ? (data) => data > min && data < max
      : (data) => data >= min && data <= max
  },
  errors: false,
  metaSchema: {
    // schema to validate keyword value
    type: "array",
    items: [{type: "number"}, {type: "number"}],
    minItems: 2,
    additionalItems: false,
  },
})

const schema = {
  range: [2, 4],
  exclusiveRange: true,
}
const validate = ajv.compile(schema)
console.log(validate(2.01)) // true
console.log(validate(3.99)) // true
console.log(validate(2)) // false
console.log(validate(4)) // false
<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">class</span> <span class="token class-name">ajv</span>
<span class="token keyword">import</span> ajv</code></pre>

ajv.addKeyword({
  keyword: "constant",
  validate: (schema, data) =>
    typeof schema == "object" && schema !== null ? deepEqual(schema, data) : schema === data,
  errors: false,
})

const schema = {
  constant: 2,
}
const validate = ajv.compile(schema)
console.log(validate(2)) // true
console.log(validate(3)) // false

const schema = {
  constant: {foo: "bar"},
}
const validate = ajv.compile(schema)
console.log(validate({foo: "bar"})) // true
console.log(validate({foo: "baz"})) // false
<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">class</span> <span class="token class-name">ajv</span>
<span class="token keyword">import</span> ajv</code></pre>

const ajv = new Ajv({coerceTypes: true})
const schema = {
  type: "object",
  properties: {
    foo: {type: "number"},
    bar: {type: "boolean"},
  },
  required: ["foo", "bar"],
}

const data = {foo: "1", bar: "false"}

const validate = ajv.compile(schema)

console.log(validate(data)) // true
console.log(data) // { "foo": 1, "bar": false }
<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">class</span> <span class="token class-name">ajv</span>
<span class="token keyword">import</span> ajv
<span class="token keyword">const</span> ajv<span class="token operator">:</span> Ajv</code></pre>

const ajv = new Ajv({coerceTypes: "array"})
const schema = {
  properties: {
    foo: {type: "array", items: {type: "number"}},
    bar: {type: "boolean"},
  },
}

const data = {foo: "1", bar: ["false"]}

const validate = ajv.compile(schema)

console.log(validate(data)) // true
console.log(data) // { "foo": [1], "bar": false }
<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">class</span> <span class="token class-name">ajv</span>
<span class="token keyword">import</span> ajv
<span class="token keyword">const</span> ajv<span class="token operator">:</span> Ajv</code></pre>

apiValidator.loadSchemas = parser
    .dereference(path.resolve('src/backend/schema/index.json'))
    .then((schema) => {
        ajv.addSchema(schema);
        return schema;
    })
<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token keyword">module</span> apiValidator
<span class="token keyword">function</span> <span class="token function">apiValidator</span><span class="token punctuation">(</span><span class="token parameter">schema<span class="token operator">:</span> any<span class="token punctuation">,</span> payload<span class="token operator">:</span> any</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span><span class="token builtin">any</span><span class="token operator">></span></code><div class="typing-tooltip-markup"><em>@param</em> <code>schema</code><br><br><em>@param</em> <code>payload</code><br><br><em>@returns</em></div></pre>

const ajv = new Ajv()
const validate = ajv.addSchema(defsSchema).compile(schema)
<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">class</span> <span class="token class-name">ajv</span>
<span class="token keyword">import</span> ajv
<span class="token keyword">const</span> ajv<span class="token operator">:</span> Ajv</code></pre>

const ajv = new Ajv({loadSchema: loadSchema})

ajv.compileAsync(schema).then(function (validate) {
  const valid = validate(data)
  // ...
})

async function loadSchema(uri) {
  const res = await request.json(uri)
  if (res.statusCode >= 400) throw new Error("Loading error: " + res.statusCode)
  return res.body
}
<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">class</span> <span class="token class-name">ajv</span>
<span class="token keyword">import</span> ajv
<span class="token keyword">const</span> ajv<span class="token operator">:</span> Ajv</code></pre>

constructor(validatorOptions) {
    
    //...
const validator = ajv({
      allErrors: true,
      errorDataPath: 'property',
      jsonPointers: true,
      verbose: true,
      schemas: this.schemas,
      schemaId: 'auto',
    });

    validator.addMetaSchema(jsonSchemaDraft06);
    ajvMergePatch(validator);
    this._addCustomFormats(validator);
    
    //...
}

  
<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript">constructor <span class="token function">SchemaValidator</span><span class="token punctuation">(</span>validatorOptions<span class="token operator">:</span> <span class="token punctuation">{</span>
    minManifestVersion<span class="token operator">?</span><span class="token operator">:</span> <span class="token builtin">number</span><span class="token punctuation">;</span>
    maxManifestVersion<span class="token operator">?</span><span class="token operator">:</span> <span class="token builtin">number</span><span class="token punctuation">;</span>
    schemas<span class="token operator">?</span><span class="token operator">:</span> object<span class="token punctuation">;</span>
    schemaObject<span class="token operator">?</span><span class="token operator">:</span> object<span class="token punctuation">;</span>
    themeSchemaObject<span class="token operator">?</span><span class="token operator">:</span> object<span class="token punctuation">;</span>
    messagesSchemaObject<span class="token operator">?</span><span class="token operator">:</span> object<span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token operator">:</span> SchemaValidator</code><div class="typing-tooltip-markup">Create a SchemaValidator instance, optionally customized by the given options.<br><br><em>@param</em> <code>validatorOptions</code></div></pre>

//...
//support draft-04
validator.addMetaSchema(draft4);

Object.keys(Schemas).forEach(function (key) {
  if (key === 'default') {
    return;
  }
  let val = Schemas[key];

  validator.addSchema(val, key);
});



//...
<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token keyword">const</span> validator<span class="token operator">:</span> Ajv<span class="token punctuation">.</span>Ajv</code></pre>

async function test() {
  
  //...
const schema = JSON.parse(await fs.readFile("./schema/buttplug-schema.json", "utf-8"));
  const validator = new ajv();
  validator.addMetaSchema(require("ajv/lib/refs/json-schema-draft-06.json"));
  const jsonValidator = validator.compile(schema);
  
  //...
}

<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token keyword">function</span> <span class="token function">test</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span><span class="token keyword">void</span><span class="token operator">></span></code></pre>

const draft6MetaSchema = require("ajv/dist/refs/json-schema-draft-06.json")
ajv.addMetaSchema(draft6MetaSchema)
<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token keyword">import</span> draft6MetaSchema</code></pre>

//...
const conf = require('../conf');

const ajv = new Ajv({
    schemaId: 'auto',
    allErrors: true,
    verbose: true,
});

ajv.addMetaSchema(require('ajv/lib/refs/json-schema-draft-04.json'));
ajv.addMetaSchema(require('ajv/lib/refs/json-schema-draft-06.json'));

function URIfromId(id) {
    return url.parse(id).path;
}



//...
<pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token keyword">import</span> conf</code></pre>