javascript - Moment.Js calculate difference datetime and show result
问题描述
Library moments.js included. I have a variable "lastMessage.created_at" If it today's date to display then time in the format "h:mm a" if it was yesterday, display "Yesterday" or before that "D.M.Y", how do I do this ?
解决方案
You could create a function to format input dates, these can be strings (in supported formats), Dates or moment objects.
We'll then output a different format based on whether the date is the same or after the start of today, the start of yesterday, or before that.
function formatDisplayDate(input) {
const dt = moment(input);
const startOfToday = moment().startOf('day');
const startOfYesterday = moment().startOf('day').subtract(1, 'day');
if (dt.isSameOrAfter(startOfToday)) {
return dt.format('h:mm a');
} else if (dt.isSameOrAfter(startOfYesterday)) {
return 'Yesterday';
} else {
// Before yesterday
return dt.format('D.M.Y');
}
}
const inputs = [ new Date().toLocaleString('sv'), new Date(Date.now() - 86400000).toLocaleString('sv'), new Date(Date.now() - 4*86400000).toLocaleString('sv') ];
for (let input of inputs) {
console.log(`Input: ${input}, output: ${formatDisplayDate(input)}`);
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js" referrerpolicy="no-referrer"></script>
推荐阅读
- python - Google Foobar 挑战 Minion 工作任务
- wpf - 如何使用 WPF PrintDialog 在内部创建 ODTTF 字体而不是从我的嵌入字体制作字形图像 (.png)?
- arrays - 将索引位置更改为 0 与 swift 中的条件匹配
- ms-access-2016 - 从多个列中选择最新的并组合成一个字段
- ruby-on-rails - 我可以在 Rails 的视图组件中使用 yield 吗?
- server - 在 Windows cmd 上运行 Wildfly 20
- python - 使用 python 从数据选项卡中抓取评论
- javascript - 错误:学生班中的构造函数学生不能应用于给定类型;超级(姓名,注册);
- javascript - 不发生反序列化
- python - 如何与相应的行一起打开和关闭图例