思路就是把history数组处理成一个相同日期是在同一个数组成员内，再调整一下 addHisList 函数就可以

demo 链接：https://codepen.io/liangxh052...

function handleHistory(history) {

const arr = history.map(item => {

return {

date: dateFormat(item.date, 'YYYY-MM-DD'),

list: [

{

SName: item.SName,

content: item.content

}

]

}

});

let result = [];

arr.forEach(item => {

if (result.some(every => every.date === item.date)) {

result.forEach(_ => {

if(_.date === item.date) {

_.list = _.list.concat(item.list)

}

})

} else {

result.push(item)

}

})

return result;

}

const history = [

{"type":"text","date":1592889320877,"SName":"xxx","content":"1"},

{"type":"text","date":1592889320877,"SName":"xxx","content":"2"},

{"type":"text","date":1592889320877,"SName":"xxx","content":"3"},

{"type":"text","date":1592889320877,"SName":"xxx","content":"4"},

{"type":"text","date":1592981108862,"SName":"xxx","content":"4"}

]

console.log(handleHistory(history))

function dateFormat (date, format, en) {

let self = new Date(date);

let fmt = format || 'YYYY-MM-DD hh:mm:ss';

let o = {

'M+': self.getMonth() + 1,

'D+': self.getDate(),

'h+': self.getHours(),

'H+': self.getHours() % 12 === 0 ? 12 : self.getHours() % 12,

'N': self.getHours() >= 12 ? (en ? 'PM' : '\u4e0b') : (en ? 'AM' : '\u4e0a'),

'm+': self.getMinutes(),

's+': self.getSeconds(),

'q+': Math.floor((self.getMonth() + 3) / 3),

'S': self.getMilliseconds()

};

if (/(Y+)/.test(fmt)) {

fmt = fmt.replace(RegExp.$1, (self.getFullYear() + '').substr(4 - RegExp.$1.length));

}

for (let k in o) {

if (new RegExp('(' + k + ')').test(fmt)) {

fmt = fmt.replace(RegExp.$1, (RegExp.$1.length === 1) ? (o[k]) : (('00' + o[k]).substr(('' + o[k]).length)));

}

}

let week = ['\u65e5', '\u4e00', '\u4e8c', '\u4e09', '\u56db', '\u4e94', '\u516d'];

let weekEn = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];

if (/(d+)/.test(fmt)) {

if (en) {

fmt = fmt.replace(RegExp.$1, (RegExp.$1.length > 1) ? weekEn[self.getDay()].substr(0, 3) : weekEn[self.getDay()]);

} else {

fmt = fmt.replace(RegExp.$1, ((RegExp.$1.length > 1) ? (RegExp.$1.length > 2 ? '\u661f\u671f' : '\u5468') : '') + week[self.getDay()]);

}

}

return fmt;

};