js数组操作，实现日期排序

需求：根据时间倒序排列新闻列表

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  let newList = [
            {title:'新闻',time:'2017-12-30'},
            {title:'新闻',time:'2018-09-30'},
            {title:'新闻',time:'2018-12-30'},
        ];
        newList.sort((a,b) => {
            return a.time > b.time ? 1 : -1;
        })
        console.log(newList)

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