Function checkKeyword

lib/core.ts:826–836

(this: Ajv, keyword: string | string[], def?: KeywordDefinition)

const KEYWORD_NAME = /^[a-z_$][a-z0-9_$:-]*$/i

function checkKeyword(this: Ajv, keyword: string | string[], def?: KeywordDefinition): void {
  const {RULES} = this
  eachItem(keyword, (kwd) => {
    if (RULES.keywords[kwd]) throw new Error(`Keyword ${kwd} is already defined`)
    if (!KEYWORD_NAME.test(kwd)) throw new Error(`Keyword ${kwd} has invalid name`)
  })
  if (!def) return
  if (def.$data && !("code" in def || "validate" in def)) {
    throw new Error('$data keyword must have "code" or "validate" function')
  }
}

function addRule(
  this: Ajv,