vuex

vue学习指南：第十五篇(详细) - Vuex

由 牧云@^-^@ 提交于 2020-01-10 15:21:20
Vuex 一、基础 　　1. Vuex 相当于 vue的数据仓库 　　2. Vuex 是 vue 的状态管理工具 　　3. Vuex中的 state 只能通过mutations 改变 　　4. Vuex很适合做购物车 什么是Vuex？ 　　Vuex采用集中式存储所有组件的数据状态，并且中间状态和store（后台数据）是响应的。 什么是响应？ 　　前台的组件数据发生改变了，那后台的store数据都会发生改变，从而导致根这个组件有关联的都会改变，所以很适合做购物车。 Vuex有什么好处？及使用场景？ 　　好处：可以做状态管理 采用LocalStorage保存信息，数据便一直存储在用户的客户端中。 　　使用场景：适合在巨大复杂的项目中使用。 Vuex有什么优势？ 　　1. Vuex的状态存储是响应式的 　　2. 它是所有组件的状态集合 Vuex的核心及其作用 　　核心概念：state，getters，mutation，action，module 　　作用：组件之间的数据通信，使用单向数据流的方式进行数据的中心化管理 详述Vuex的运行机制 　　Vuex的状态存储是响应式的，当Vuex组件从store中读取时，若 store状态发生改变，响应的组件也会更新状态，但是直接改变 state，必须通过显示的提交（commit）mutaions来追踪每个状态的变化。 二、Vuex的流程图： 　　1

uniapp app-plus pages.json

由 最后都变了- 提交于 2020-01-09 19:35:23
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> app-plus Object 设置编译到 App 平台的特定样式，配置项参考下方 app-plus App 参考地址 https://uniapp.dcloud.io/collocation/pages app-plus 配置编译到 App 平台时的特定样式，部分常用配置 H5 平台也支持。以下仅列出常用，更多配置项参考 WebviewStyles。 titleNView Object 导航栏 ，详见:导航栏 App、H5 subNVues Object 原生子窗体，详见:原生子窗体 App 1.9.10+ bounce String 页面回弹效果，设置为 "none" 时关闭效果。 App（nvue Android无页面级bounce效果，仅list、recycle-list、waterfall等滚动组件有bounce效果） softinputNavBar String auto iOS软键盘上完成工具栏的显示模式，设置为 "none" 时关闭工具栏。 仅ios生效 softinputMode String adjustPan 软键盘弹出模式，支持 adjustResize、adjustPan 两种模式 App pullToRefresh Object 下拉刷新 App scrollIndicator

Binding img src

由 て烟熏妆下的殇ゞ 提交于 2020-01-06 21:12:10
问题 I have an img tag in a Vue component with a binded src attribute to Vuex state. <img :src="this.$store.state.imageDataURI"> I am successfully updating that state object in Vuex (see below). However the img tag does not get rendered (see below). I can fix this with getters but just curious as to why this doesn't work. I suspect this has to do with Vue's reactivity model. Any ideas? 回答1: When attaching to bindings, this isn't needed and if I'm remembering right can cause issues like this. Also

Bootstrap Vue - Passing Card Data as a payload

由 感情迁移 提交于 2020-01-06 12:25:28
问题 Is there a similar way to pass card data like rowData when using bootstrap vue? I am using this function to commit card data to the state and it doesn't seem to work. I am using a similar method to pass rowData and it works fine. CARD DATA Action... setCard: function ({commit}, cardData) { commit('setCardToState', cardData) } Mutation... setCardToState (state, cardData) { state.addeditinitiative.name = cardData.name state.addeditinitiative.description = cardData.description state

how to make a div draggable in vue js?

由 做~自己de王妃 提交于 2020-01-06 08:29:19
问题 I have a div inside a vue component, I want to make the component draggable. I checked with many vue draggable plugins, but they have a seperate component for drag and not as a directive to just add like in angular draggable. Please help me with this? 回答1: You need to add vuedraggable to your node modules. yarn add vuedraggable and then: import draggable from 'vuedraggable' ... export default { components: { draggable, } and then you need something like this: <draggable> <div v-for=...> </div

How can I upload file using vuex store on the vue component?

由 时光怂恿深爱的人放手 提交于 2020-01-06 06:03:48
问题 If I using ajax in vue component like this : It works. I successfully get the file But here I want to using vuex store My pattern of vuex store like this : I change my vue component like this : <template> <div> ... </div> </template> <script> export default { methods: { submitForm() { ... formData.append('file', files) this.updateProfile({formData, reload: true}) } } } </script> In the component vue, it will call updateProfile method in modules user The modules user like this : import { set }

Hiding a pargraph using v-if through vuex but containing that in a specific tab

由 我的未来我决定 提交于 2020-01-06 05:27:06
问题 I have an array in My store which i am looping through to get a list which will be their own pages and share a same paragraph. I have a button which hides the paragraph. How do i make it so that it hides only on the first page and not on the other pages? So the way it should work is that if hide the paragraph in the Apple page, it should still appear on the other four pages.Or for the matter, if i hide the paragraph on any of the pages, it should not affect on any other page. Thank You import

How to retrieve the old and new values of a store state

由 回眸只為那壹抹淺笑 提交于 2020-01-05 05:28:09
问题 In my component I am trying to get the old value and new value of a particular array of objects that is assigned in the vuex store state as followed. However when I newArray and oldArray return the same array of objects. I understand from the documentation the following but I dont understand what is the best way to retrieve the different versions. Note: when mutating (rather than replacing) an Object or an Array, the old value will be the same as new value because they reference the same

VUE / VUEX: How To Pass Data From Parent Template To Child Template

由 十年热恋 提交于 2020-01-04 05:45:11
问题 Using VUE 2.0 and VUEX I am a bit confused about how to pass data from parent to child . <template> <div id="app" class="container"> <div class="card" v-for="(triad, index) in triads"> <div class="row"> <div class="col-sm-4"> <people /> </div> <div class="col-sm-4"> <places /> </div> <div class="col-sm-4"> <equipment /> </div> </div> </div> </div> </template> I am looping through an array named "triads": state: { triads: [ { people: [], places: [], equipment: [] } ] } I want to send the triad

Vue.js 2/Vuex - How to call getters from modules that has attribute namespaced:true without mapGetters?

由 别说谁变了你拦得住时间么 提交于 2020-01-04 02:11:48
问题 This is my module: const ModuleA={ namespaced:true, state:{ categoryList:[ {name:'all', isActive:true}, {name:'negotiation', isActive:false}, ] }, getters:{ getCategory:(state)=>(index)=>{ return state.categoryList[index]; }, } } Without namespaced:true , I can call getCategory with this.$store.getters.getCategory(this.index) . How to call getCategory with namespaced:true ? I can't use mapGetters because I have to pass parameter to the function. 回答1: See 2nd answer to this How to access Vuex
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