我将 dayjs 添加到 Rail 6.1.3 的方式,首先运行命令:
$ yarn add jquery
$ yarn add dayjs
然后把这段代码写到 config/webpack/environment.js
const { environment } = require('@rails/webpacker')
const webpack = require('webpack')
environment.plugins.prepend('Provide',
new webpack.ProvidePlugin({
$: 'jquery/src/jquery',
jQuery: 'jquery/src/jquery',
dayjs: 'dayjs/dayjs.min'
})
)
module.exports = environment
并调用它运行app/javascript/packs/application.js,一切都会好的!
import Rails from "@rails/ujs"
import Turbolinks from "turbolinks"
import * as ActiveStorage from "@rails/activestorage"
import "channels"
Rails.start()
Turbolinks.start()
ActiveStorage.start()
require("jquery")
require("dayjs")
jQuery(function(){
alert(dayjs().format('{YYYY} MM-DDTHH:mm:ss SSS [Z] A'))
})
奖励,示例使用 javascript 函数显示本地日期时间:创建表事件,包含 2 个字段:名称:字符串,starts_at:日期时间。
$ rails generate model Event name:string starts_at:datetime
$ rails db:migrate
运行 rails 控制台为 Event 模型创建伪造数据:
$ rails console
> Event.new(name: "Event 1", starts_at: Time.now).save
> Event.new(name: "Event 2", starts_at: Time.now).save
> Event.new(name: "Event 3", starts_at: Time.now).save
> Event.new(name: "Event 4", starts_at: Time.now).save
使用以下内容创建 app/javascript/packs/convert.js:
jQuery(function(){
// alert(12345)
$("span[data-utc-time]").each(function() {
var timestamp = $(this).attr("data-utc-time");
var localeTimestamp = new Date(timestamp).toLocaleString();
$(this).html(localeTimestamp);
});
})
在 app/views/pages/home.html.erb 中包含这个 javascript
Welcome to project railstrace !
<% @events.each do |e| %>
<p> <%= e.name %>:
<span data-utc-time="<%= e.starts_at %>"> </span>
</p>
<% end %>
<%= javascript_pack_tag 'convert' %>
路由配置/routes.rb
Rails.application.routes.draw do
root to: "pages#home"
end
在 app/controllers/pages_controller.rb
class PagesController < ApplicationController
def home
@events = Event.all
end
end
这只是使用简单 javascript 的示例,带有一些日期时间的高级处理,您可以使用 lib dayjs。
如果有任何问题,请告诉我,我会尽力帮助你,柠檬!
更新代码以使用 dayjs:
编辑文件 app/javascript/packs/convert.js 的内容:
jQuery(function(){
//Extend dayjs plugin
var relativeTime = require('dayjs/plugin/relativeTime')
dayjs.extend(relativeTime)
// alert(dayjs().from(dayjs('2021-05-19 11:21:55 UTC'), true) )
$("span[data-utc-time]").each(function() {
var timestamp = $(this).attr("data-utc-time")
var localeTimestamp = new Date(timestamp).toLocaleString()
var fromNow = dayjs().from(dayjs(timestamp), true)
var content = `Start at: ${localeTimestamp}. Ago: ${fromNow}`
// $(this).html(localeTimestamp)
$(this).html(content)
});
})