The time filter vue

// global filter, formatting time

// so-called global filter even if all instances are shared vue

Vue.filter('dateFormat' ,function(dateStr, pattern=""){

// string according to the given time, a particular time to give

　　var dt = new Date(dateStr)

　　//yyy---mm-dd

　　var y = dt.getFullYear () // obtained Year

　　var m = dt.getMonth () + 1 // to give January

　　var d = dt.getDate () // Date obtained

　　// return y + '-' + m + '-' + d

　　if(pattern.toLowerCase() ==="yyy-mm-dd"){

　　　　return `${y}-${m}-${d}`

　　}

　　　else {

　　　　var hh = dt.getHours () // obtained when

　　　　var mm = dt.getMinutes () // points to give

　　　　var ss = dt.getSeconds () // sec to give

　　　　return `${y}-${m}-${d} ${hh}:${mm}:${ss}`

　　　}

})