inputフォームのvalueをHH:mm形式にフォーマットする

util.js

import moment from 'moment'
export default {
  formInputTime (val = '') {
    let h, m, ar
    val = val.replace(/(^\s+)|(\s+$)/g, '').replace(/\n/g, '')
    ar = val.split(':')
    if (ar.length === 2) {
      h = ar[0]
      m = ar[1]
    } else {
      if (val.match(/\d{3}/) && val.length === 3) {
        h = val.substr(0, 1)
        m = val.substr(1, 2)
      } else if (val.match(/\d{4}/)) {
        h = val.substr(0, 2)
        m = val.substr(2, 2)
      }
    }
    if ((h || h === 0) && (m || m === 0)) {
      return moment().hour(h).minute(m).format('HH:mm')
    } else {
      return ''
    }
  }
}