How to use the imask function in imask

componentDidMount () {
    const {mask} = this.props
    this.mask = new IMask(this.field, mask)
  }

private initMask () {
    this.maskRef = IMask(this.element, this.imask as Opts)
      .on('accept', this._onAccept.bind(this))
      .on('complete', this._onComplete.bind(this));
  }

componentDidMount() {
    const {mask} = this.props
    this.mask = new IMask(this.field, mask)
  }

function initMask (el, opts) {
  el.maskRef = new IMask(el, opts)
    .on('accept', () => fireEvent(el, 'accept', el.maskRef))
    .on('complete', () => fireEvent(el, 'complete', el.maskRef));
}

initMask (maskOptions=this._extractMaskOptionsFromProps({...this.props})) {
      this.maskRef = new IMask(this.element, maskOptions)
        .on('accept', this._onAccept.bind(this))
        .on('complete', this._onComplete.bind(this));

      this.maskValue = this.props.value;
    }

export const maskMaker = config => domEl => iMask(domEl, config);