Vue.JS实现垂直方向展开、收缩不定高度模块的JS组件
ECMAScripter 人气:0需求分析:
如图,有很多高度不固定的模块(图中只显示两个,本人项目有十三个),点击模块标题展开相应的模块,再次点击此模块匿藏,如何实现此需求并实现复用?
点击红框前:
点击后:
难点分析:
模块高度不固定。比如,本人一开始想到的方法如下:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> .box{ height:500px; background-color:black; overflow: hidden; } .mybox-leave-active,.mybox-enter-active{ transition: all 1s ease; } .mybox-leave-active,.mybox-enter{ height:0px !important; } .mybox-leave,.mybox-enter-active{ height: 500px; } </style> </head> <body> <div id="box"> <transition name="mybox"> <div class="box" v-show="boxshow"></div> </transition> <button @click="togglebox">按钮</button> </div> </body> <script src="../bower_components/vuehttps://img.qb5200.com/download-x/dist/vue.js"></script> <script> new Vue({ el:'#box', data:{ boxshow:false }, methods:{ togglebox:function(){ this.boxshow = !this.boxshow; } } }); </script> </html>
这种方法确实可以实现点击展开,再次点击收缩的需求,但是有一个明显的缺点:限定了容器的高度,也就是每个模块都需要固定高度,并不适用于需求场景。
解决方案:
1、实现一个函数式组件
本人命名为vertical-toggle.js // Created by xiaoqiang on 17/04/2018. const elTransition = '0.3s height ease-in-out, 0.3s padding-top ease-in-out, 0.3s padding-bottom ease-in-out' const Transition = { 'before-enter' (el) { el.style.transition = elTransition if (!el.dataset) el.dataset = {} el.dataset.oldPaddingTop = el.style.paddingTop el.dataset.oldPaddingBottom = el.style.paddingBottom el.style.height = 0 el.style.paddingTop = 0 el.style.paddingBottom = 0 }, 'enter' (el) { el.dataset.oldOverflow = el.style.overflow if (el.scrollHeight !== 0) { el.style.height = el.scrollHeight + 'px' el.style.paddingTop = el.dataset.oldPaddingTop el.style.paddingBottom = el.dataset.oldPaddingBottom } else { el.style.height = '' el.style.paddingTop = el.dataset.oldPaddingTop el.style.paddingBottom = el.dataset.oldPaddingBottom } el.style.overflow = 'hidden' }, 'after-enter' (el) { el.style.transition = '' el.style.height = '' el.style.overflow = el.dataset.oldOverflow }, 'before-leave' (el) { if (!el.dataset) el.dataset = {} el.dataset.oldPaddingTop = el.style.paddingTop el.dataset.oldPaddingBottom = el.style.paddingBottom el.dataset.oldOverflow = el.style.overflow el.style.height = el.scrollHeight + 'px' el.style.overflow = 'hidden' }, 'leave' (el) { if (el.scrollHeight !== 0) { el.style.transition = elTransition el.style.height = 0 el.style.paddingTop = 0 el.style.paddingBottom = 0 } }, 'after-leave' (el) { el.style.transition = '' el.style.height = '' el.style.overflow = el.dataset.oldOverflow el.style.paddingTop = el.dataset.oldPaddingTop el.style.paddingBottom = el.dataset.oldPaddingBottom } } export default { name: 'VerticalToggle', functional: true, render (h, { children }) { const data = { on: Transition } return h('transition', data, children) } }
2、引用此组件
在components中注册了此组件:
即可在teamplate中引用,请留意红框文字说明部分。
至此,Vue.js实现垂直展开、收缩不定高度模块组件实现完成及应用均已完成。
实现效果:
总结
以上所述是小编给大家介绍的Vue.JS实现垂直方向展开、收缩不定高度模块的JS组件,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对网站的支持!
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