datepicker's value type customized

[Uther]

This function solves the problem (这个功能解决的问题)

now the value is timestamp only , if i need a value format like 'YYYY-MM-DD', i need to import a lib like moment and then trans the value to post to backend,u can add a prop allow me to customize it

Expected API (期望的 API)

const renderFormat = computed(() => {
      const { type, format } = attrs
      const defaultM = isDateTimeType(type) ? 'YYYY-MM-DD HH:mm:ss' : 'YYYY-MM-DD'
      const defaultN = isDateTimeType(type) ? 'yyyy-MM-dd HH:mm:ss' : 'yyyy-MM-dd'
      if (format) {
        return {m: format.m || defaultM, n: format.n || defaultN}
      } else {
        return {m: defaultM, n: defaultN}
      }
    })
    const getTrueValue = (val) => {
      const props = {...val}
      const { endProp, startProp, type = 'date'  } = props
      if (props.value) {
        if (['datetimerange', 'daterange'].includes(type) && startProp && endProp) { 
          props._value = [moment(props.value[0]).format('x') * 1, moment(props.value[1]).format('x') * 1]
          props.value = [moment(props.value[0]).format(renderFormat.m), moment(props.value[1]).format(renderFormat.m)]
        } else {
          props._value = moment(props.value).format('x') * 1
          props.value = moment(props._value).format(renderFormat.m)
        }
      } else {
        props._value = props.value
      }
      return props
    }
const onUpdate = (v) => {
      const { needTrans = true, type, startProp, endProp } = attrs
      let nv = null
      if (v) {
        if (['datetimerange', 'daterange'].includes(type) && startProp && endProp) {
          nv = needTrans ? [moment(v[0]).format(renderFormat.value.m), moment(v[1]).format(renderFormat.value.m)] : [moment(v[0]).format('x'), moment(v[1]).format('x')]
        } else {
          nv = needTrans ? moment(v).format(renderFormat.value.m) : moment(v).format('x')
        }
      } else {
        nv = v
      }
      attrs.onInput(nv)
    }

[07akioni]

Will fix soon