How to implement pull-up loading function in vue2
This article mainly introduces the pull-up loading function based on vue2 in detail. It has certain reference value. Interested friends can refer to it.
The example in this article shares with you the implementation of vue2. The specific code for pull loading display is for your reference. The specific content is as follows
Because swiper is also used in our project. Many of them are sliding to switch, but they have to be pulled up to load. As a result, many UI frameworks we used have different bugs. We had no choice but to write one in the end. The code is as follows (this is used in many places, so it is recommended to place it under components/common):
<template> <p class="loadmore"> <slot></slot> <slot name="bottom"> </slot> </p> </template> <style> .loadmore{ width:100%; } </style> <script> export default { name: 'loadmore', props: { maxDistance: { type: Number, default: 0 }, autoFill: { type: Boolean, default: true }, distanceIndex: { type: Number, default: 2 }, bottomPullText: { type: String, default: '上拉刷新' }, bottomDropText: { type: String, default: '释放更新' }, bottomLoadingText: { type: String, default: '加载中...' }, bottomDistance: { type: Number, default: 70 }, bottomMethod: { type: Function }, bottomAllLoaded: { type: Boolean, default: false }, }, data() { return { // 最下面出现的p的位移 translate: 0, // 选择滚动事件的监听对象 scrollEventTarget: null, containerFilled: false, bottomText: '', // class类名 bottomDropped: false, // 获取监听滚动元素的scrollTop bottomReached: false, // 滑动的方向 down---向下互动;up---向上滑动 direction: '', startY: 0, startScrollTop: 0, // 实时的clientY位置 currentY: 0, topStatus: '', // 上拉加载的状态 '' pull: 上拉中 bottomStatus: '', }; }, watch: { // 改变当前加载在状态 bottomStatus(val) { this.$emit('bottom-status-change', val); switch (val) { case 'pull': this.bottomText = this.bottomPullText; break; case 'drop': this.bottomText = this.bottomDropText; break; case 'loading': this.bottomText = this.bottomLoadingText; break; } } }, methods: { onBottomLoaded() { this.bottomStatus = 'pull'; this.bottomDropped = false; this.$nextTick(() => { if (this.scrollEventTarget === window) { document.body.scrollTop += 50; } else { this.scrollEventTarget.scrollTop += 50; } this.translate = 0; }); // 注释 if (!this.bottomAllLoaded && !this.containerFilled) { this.fillContainer(); } }, getScrollEventTarget(element) { let currentNode = element; while (currentNode && currentNode.tagName !== 'HTML' && currentNode.tagName !== 'BODY' && currentNode.nodeType === 1) { let overflowY = document.defaultView.getComputedStyle(currentNode).overflowY; if (overflowY === 'scroll' || overflowY === 'auto') { return currentNode; } currentNode = currentNode.parentNode; } return window; }, // 获取scrollTop getScrollTop(element) { if (element === window) { return Math.max(window.pageYOffset || 0, document.documentElement.scrollTop); } else { return element.scrollTop; } }, bindTouchEvents() { this.$el.addEventListener('touchstart', this.handleTouchStart); this.$el.addEventListener('touchmove', this.handleTouchMove); this.$el.addEventListener('touchend', this.handleTouchEnd); }, init() { this.bottomStatus = 'pull'; // 选择滚动事件的监听对象 this.scrollEventTarget = this.getScrollEventTarget(this.$el); if (typeof this.bottomMethod === 'function') { // autoFill 属性的实现 注释 this.fillContainer(); // 绑定滑动事件 this.bindTouchEvents(); } }, // autoFill 属性的实现 注释 fillContainer() { if (this.autoFill) { this.$nextTick(() => { if (this.scrollEventTarget === window) { this.containerFilled = this.$el.getBoundingClientRect().bottom >= document.documentElement.getBoundingClientRect().bottom; } else { this.containerFilled = this.$el.getBoundingClientRect().bottom >= this.scrollEventTarget.getBoundingClientRect().bottom; } if (!this.containerFilled) { this.bottomStatus = 'loading'; this.bottomMethod(); } }); } }, // 获取监听滚动元素的scrollTop checkBottomReached() { if (this.scrollEventTarget === window) { return document.body.scrollTop + document.documentElement.clientHeight >= document.body.scrollHeight; } else { // getBoundingClientRect用于获得页面中某个元素的左,上,右和下分别相对浏览器视窗的位置。 right是指元素右边界距窗口最左边的距离,bottom是指元素下边界距窗口最上面的距离。 return this.$el.getBoundingClientRect().bottom <= this.scrollEventTarget.getBoundingClientRect().bottom + 1; } }, // ontouchstart 事件 handleTouchStart(event) { // 获取起点的y坐标 this.startY = event.touches[0].clientY; this.startScrollTop = this.getScrollTop(this.scrollEventTarget); this.bottomReached = false; if (this.bottomStatus !== 'loading') { this.bottomStatus = 'pull'; this.bottomDropped = false; } }, // ontouchmove事件 handleTouchMove(event) { if (this.startY < this.$el.getBoundingClientRect().top && this.startY > this.$el.getBoundingClientRect().bottom) { // 没有在需要滚动的范围内滚动,不再监听scroll return; } // 实时的clientY位置 this.currentY = event.touches[0].clientY; // distance 移动位置和开始位置的差值 distanceIndex--- let distance = (this.currentY - this.startY) / this.distanceIndex; // 根据 distance 判断滑动的方向 并赋予变量 direction down---向下互动;up---向上滑动 this.direction = distance > 0 ? 'down' : 'up'; if (this.direction === 'up') { // 获取监听滚动元素的scrollTop this.bottomReached = this.bottomReached || this.checkBottomReached(); } if (typeof this.bottomMethod === 'function' && this.direction === 'up' && this.bottomReached && this.bottomStatus !== 'loading' && !this.bottomAllLoaded) { // 有加载函数,是向上拉,有滚动距离,不是正在加载ajax,没有加载到最后一页 event.preventDefault(); event.stopPropagation(); if (this.maxDistance > 0) { this.translate = Math.abs(distance) <= this.maxDistance ? this.getScrollTop(this.scrollEventTarget) - this.startScrollTop + distance : this.translate; } else { this.translate = this.getScrollTop(this.scrollEventTarget) - this.startScrollTop + distance; } if (this.translate > 0) { this.translate = 0; } this.bottomStatus = -this.translate >= this.bottomDistance ? 'drop' : 'pull'; } }, // ontouchend事件 handleTouchEnd() { if (this.direction === 'up' && this.bottomReached && this.translate < 0) { this.bottomDropped = true; this.bottomReached = false; if (this.bottomStatus === 'drop') { this.translate = '-50'; this.bottomStatus = 'loading'; this.bottomMethod(); } else { this.translate = '0'; this.bottomStatus = 'pull'; } } this.direction = ''; } }, mounted() { this.init(); } }; </script>
Then import it on which page it is needed: import LoadMore from './../common/ loadmore.vue';The page where you need to introduce it is written as follows:
<template> <section class="finan"> <!-- 上拉加载更多 --> <load-more :bottom-method="loadBottom" :bottom-all-loaded="allLoaded" :bottomPullText='bottomText' :auto-fill="false" @bottom-status-change="handleBottomChange" ref="loadmore"> <p> 这里写你需要的另外的模块 </p> <p v-show="loading" slot="bottom" class="loading"> 这个p是为让上拉加载的时候显示一张加载的gif图 <img src="./../../assets/main/uploading.gif"> </p> </load-more> </section> </template>
Then set the data and methods in this page as follows:
export default { name: 'FinancialGroup', props:{ }, data () { return { // 上拉加载数据 scrollHeight: 0, scrollTop: 0, containerHeight: 0, loading: false, allLoaded: false, bottomText: '上拉加载更多...', bottomStatus: '', pageNo: 1, totalCount: '', } }, methods: { /* 下拉加载 */ _scroll: function(ev) { ev = ev || event; this.scrollHeight = this.$refs.innerScroll.scrollHeight; this.scrollTop = this.$refs.innerScroll.scrollTop; this.containerHeight = this.$refs.innerScroll.offsetHeight; }, loadBottom: function() { this.loading = true; this.pageNo += 1; // 每次更迭加载的页数 if (this.pageNo == this.totalGetCount) { // 当allLoaded = true时上拉加载停止 this.loading = false; this.allLoaded = true; } api.commonApi(后台接口,请求参数) 这个api是封装的axios有不懂的可以看vue2+vuex+axios那篇文章 .then(res => { setTimeout(() => { 要使用的后台返回的数据写在setTimeout里面 this.$nextTick(() => { this.loading = false; }) }, 1000) }); }, handleBottomChange(status) { this.bottomStatus = status; }, }
The above is what I compiled for everyone. I hope that in the future It will be helpful to everyone.
Related articles:
How to implement parasitic combined inheritance using JavaScript
How to implement delayed loading of non-first-screen images in JS
What are the reference methods for libraries in jQuery
How to generate word images in js
The above is the detailed content of How to implement pull-up loading function in vue2. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undress AI Tool
Undress images for free

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Building a Vue component library requires designing the structure around the business scenario and following the complete process of development, testing and release. 1. The structural design should be classified according to functional modules, including basic components, layout components and business components; 2. Use SCSS or CSS variables to unify the theme and style; 3. Unify the naming specifications and introduce ESLint and Prettier to ensure the consistent code style; 4. Display the usage of components on the supporting document site; 5. Use Vite and other tools to package as NPM packages and configure rollupOptions; 6. Follow the semver specification to manage versions and changelogs when publishing.

1. The first choice for the Laravel MySQL Vue/React combination in the PHP development question and answer community is the first choice for Laravel MySQL Vue/React combination, due to its maturity in the ecosystem and high development efficiency; 2. High performance requires dependence on cache (Redis), database optimization, CDN and asynchronous queues; 3. Security must be done with input filtering, CSRF protection, HTTPS, password encryption and permission control; 4. Money optional advertising, member subscription, rewards, commissions, knowledge payment and other models, the core is to match community tone and user needs.

This article has selected a series of top-level finished product resource websites for Vue developers and learners. Through these platforms, you can browse, learn, and even reuse massive high-quality Vue complete projects online for free, thereby quickly improving your development skills and project practice capabilities.

When choosing a suitable PHP framework, you need to consider comprehensively according to project needs: Laravel is suitable for rapid development and provides EloquentORM and Blade template engines, which are convenient for database operation and dynamic form rendering; Symfony is more flexible and suitable for complex systems; CodeIgniter is lightweight and suitable for simple applications with high performance requirements. 2. To ensure the accuracy of AI models, we need to start with high-quality data training, reasonable selection of evaluation indicators (such as accuracy, recall, F1 value), regular performance evaluation and model tuning, and ensure code quality through unit testing and integration testing, while continuously monitoring the input data to prevent data drift. 3. Many measures are required to protect user privacy: encrypt and store sensitive data (such as AES

1. PHP mainly undertakes data collection, API communication, business rule processing, cache optimization and recommendation display in the AI content recommendation system, rather than directly performing complex model training; 2. The system collects user behavior and content data through PHP, calls back-end AI services (such as Python models) to obtain recommendation results, and uses Redis cache to improve performance; 3. Basic recommendation algorithms such as collaborative filtering or content similarity can implement lightweight logic in PHP, but large-scale computing still depends on professional AI services; 4. Optimization needs to pay attention to real-time, cold start, diversity and feedback closed loop, and challenges include high concurrency performance, model update stability, data compliance and recommendation interpretability. PHP needs to work together to build stable information, database and front-end.

Deploying Vue applications to production environments requires optimization of performance, ensuring stability and improving loading speed. 1. Use VueCLI or Vite to build a production version, generate a dist directory and set the correct environment variables; 2. If you use VueRouter's history mode, you need to configure the server to fallback to index.html; 3. Deploy the dist directory to Nginx/Apache, Netlify/Vercel or combine CDN acceleration; 4. Enable Gzip compression and browser caching strategies to optimize loading; 5. Implement lazy loading components, introduce UI libraries on demand, enable HTTPS, prevent XSS attacks, add CSP headers, and restrict third-party SDK domain names to enhance security.

1. The mainstream frameworks of PHP e-commerce backend include Laravel (fast development, strong ecology), Symfony (enterprise-level, stable structure), Yii (excellent performance, suitable for standardized modules); 2. The technology stack needs to be equipped with MySQL Redis cache, RabbitMQ/Kafka message queue, Nginx PHP-FPM, and front-end separation is considered; 3. High concurrency architecture should be layered and modular, database read and write separation/distributed database, accelerated with cache and CDN, asynchronous processing of tasks, sharing of load balancing and Session, gradually microservice, and establish a monitoring and alarm system; 4. Multiple monetization paths include product price difference or platform commission, site advertising, SaaS subscription, customized development and plug-in market, API connection

For Vue developers, a high-quality finished project or template is a powerful tool to quickly start new projects and learn best practices. This article has selected multiple top Vue free finished product resource portals and website navigation for you to help you find the front-end solutions you need efficiently, whether it is a back-end management system, UI component library, or templates for specific business scenarios, you can easily obtain them.
