Function get

packages/intl-numberformat/core.ts:185–220

(this: NumberFormat)

  enumerable: false,
  configurable: true,
  get(this: NumberFormat) {
    if (typeof this !== 'object' || !OrdinaryHasInstance(NumberFormat, this)) {
      throw TypeError(
        'Intl.NumberFormat format property accessor called on incompatible receiver'
      )
    }
    const internalSlots = getInternalSlots(this as any)
    let boundFormat = internalSlots.boundFormat
    if (boundFormat === undefined) {
      // https://tc39.es/proposal-unified-intl-numberformat/section11/numberformat_diff_out.html#sec-number-format-functions
      boundFormat = (
        value?:
          | number
          | bigint
          | `${number}`
          | 'Infinity'
          | '-Infinity'
          | '+Infinity'
      ) => FormatNumeric(internalSlots, ToIntlMathematicalValue(value))

      try {
        // https://github.com/tc39/test262/blob/master/test/intl402/NumberFormat/prototype/format/format-function-name.js
        Object.defineProperty(boundFormat, 'name', {
          configurable: true,
          enumerable: false,
          writable: false,
          value: '',
        })
      } catch {
        // In older browser (e.g Chrome 36 like polyfill-fastly.io)
        // TypeError: Cannot redefine property: name
      }
      internalSlots.boundFormat = boundFormat
    }
    return boundFormat
  },
} as const
try {
  // https://github.com/tc39/test262/blob/master/test/intl402/NumberFormat/prototype/format/name.js