javascript - I want to automatically format the date when entering numbers. The formatted date is: YYYY-MM-DD-PHP Chinese Network Q&A

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javascript - I want to automatically format the date when entering numbers. The formatted date is: YYYY-MM-DD

伊谢尔伦 2017-07-05 10:50:15

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I want to write a component that automatically formats the date when inputting numbers, such as: 201705. The final date format is: 2017-05. Enter 06 again to automatically format 2017-05-06

伊谢尔伦

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習慣沉默2017-07-05 10:52:15 6 floor

Edit: Simple conversion of the proposed case:

const date str = '20170523' const result = new Date() result.setFullYear(parseInt(str.substr(0, 4))) result.setMonth(parseInt(str.substr(4, 2)) - 1) result.setDate(parseInt(str.substr(6, 2))) // 函数定义见下 getDateFromTimestamp(result.getTime())

A simple implementation is as follows:

// 1495517932472 毫秒级时间戳 const date = new Date().getTime() function formatMonth (num) { return [ '01', '02', '03', '04', '05', '06', '07', '08', '09', '10', '11', '12' ][num] } function getDateFromTimestamp (ts) { const date = new Date(ts) const YYYY = date.getFullYear() const MM = formatMonth(date.getMonth()) const DD = date.getDate() return `${YYYY}-${MM}-${DD}` } // 2017-05-23 console.log(getDateFromTimestamp(date))

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世界只因有你2017-07-05 10:52:15 5 floor

You maybe need momentjs

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某草草2017-07-05 10:52:15 4 floor

funtion format_num_to_date(num) { var str = String(num); if (str.length === 8) { var date = str.substr(0,4) + '-' + str.substr(4,2) + '-' + str.substr(6); return date; } } format_num_to_date(20170523);

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刘奇2017-07-05 10:52:15 3 floor

//时间格式化 // var time1 = new Date().Format(“yyyy-MM-dd”); // var time2 = new Date().Format(“yyyy-MM-dd HH:mm:ss”); Date.prototype.Format = function (fmt) { //author: meizz var o = { "M+": this.getMonth() + 1, //月份 "d+": this.getDate(), //日 "h+": this.getHours(), //小时 "m+": this.getMinutes(), //分 "s+": this.getSeconds(), //秒 "q+": Math.floor((this.getMonth() + 3) / 3), //季度 "S": this.getMilliseconds() //毫秒 }; if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp., (this.getFullYear() + "").substr(4 - RegExp..length)); for (var k in o) if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp., (RegExp..length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length))); return fmt; }

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伊谢尔伦2017-07-05 10:52:15 2 floor

let yyyymmdd = (date, sep = '-') => { return [ date.getFullYear(), date.getMonth()+1, date.getDate() ].map(d => d.toString()) .map(d => ('00' + d).slice(d.length >= 4 ? -4 : -2)).join(sep); }