vue tab滚动到一定高度,固定在顶部,点击tab切换不同的内容操作

 <!-- tab切换star --><ul class="tab-list"> <li>产品特点</li><li>投保须知</li><li>理赔流程</li></ul><!-- 切换内容star -->

 <div class="tab-con"> <div> 第一部分内容 </div><div> 第二部分内容 </div><div> 第三部分内容 </div></div>

 data(){ return:{ whether:false, curId:0 } }

 handleScroll() { var scrollTop = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop; // console.log(scrollTop) if(scrollTop>329){ this.whether = true; }else{ this.whether = false; } },

  <div class="tab__main"> <div class="tab__div"> <ul class="tab__list"> <li class="tab__item"> <span>{{ tabs.tab_menu }}</span></li></ul><div class="active__line"></div></div></div>

 .tab__div { width: 100%; height: 102px; position: relative; padding-top: 36px; background-color: #fff; .tab__list { display: flex; .tab__item { flex: 1; font-size: 32px; } .tab__item-current { font-weight: 700; } } .active__line { position: absolute; bottom: 0; left: 0; width: 187.5px; height: 5px; background-color: #4B8FFB; transition: all 300ms; } } 

 export default { name: 'TabModule', props: { prop: { type: Object } }, data () { return { scrolltop: null, dom: null, domobj: {} // 各个dom的页面位置 } }, computed: { tabStyle () { return function (params) { return this.prop.attr.tab_content[params].tab_style || '' } } }, mounted () { this.onWatchScroll() // 这里首次进入页面当前选中项为第一个 document.querySelectorAll('.tab__item')[0].style = this.prop.attr.cur_tab_style ? this.prop.attr.cur_tab_style : '' }, methods: { // 获取各个dom的页面位置 getDomsObj () { this.domobj.dom1 = document.querySelectorAll(`#${this.prop.attr.tab_content[0].anchor_point}`)[0].offsetTop this.domobj.dom2 = document.querySelectorAll(`#${this.prop.attr.tab_content[1].anchor_point}`)[0].offsetTop this.domobj.dom3 = document.querySelectorAll(`#${this.prop.attr.tab_content[2].anchor_point}`)[0].offsetTop this.domobj.dom4 = document.querySelectorAll(`#${this.prop.attr.tab_content[3].anchor_point}`)[0].offsetTop }, // 计算当前选中滑动块儿的滑动距离和当前选中项 computerSlide (val) { let tablist = document.querySelectorAll('.tab__item') for (let i = 0; i  { // 由于在created()或者mounted()钩子函数中获取到的dom位置不对，在滑动中获取dom的页面位置 this.getDomsObj() this.scrolltop = document.documentElement.scrollTop || document.body.scrollTop || window.pageYOffset // 滑动根据滚动距离来计算当前可是区域的选中项 this.onScrollPage() // 自定义吸顶效果 if (this.scrolltop > tabmain.offsetTop) { tabdiv.style.position = 'fixed' tabdiv.style['z-index'] = 99 } else { tabdiv.style.position = 'relative' tabdiv.style['z-index'] = 0 } } }, onScrollPage () { let tab = document.querySelectorAll('.tab__div')[0] if (this.scrolltop > this.domobj.dom1 && this.scrolltop  (this.domobj.dom2 - tab.offsetHeight * 2) && this.scrolltop  (this.domobj.dom3 - tab.offsetHeight * 2) && this.scrolltop  (this.domobj.dom4 - tab.offsetHeight * 10) && this.scrolltop <this.domobj.dom4) { this.computerSlide(3) } } } }

  <div> <div class="div__header"></div><div class="div__item">{{ item }}</div><div class="div__footer">我是有底线的</div></div> import TabModule from '../../components/TabModule.vue' export default { components: { TabModule }, data () { return { tabattributes: { box_style: "margin-top: 10px;", attr: { cur_tab_style: "font-weight: 700;", cur_slide_style: "", tab_content: [{ tab_menu: "控件1", anchor_point: "DomPoint1", tab_style: "" }, { tab_menu: "控件2", anchor_point: "DomPoint2", tab_style: "" }, { tab_menu: "控件3", anchor_point: "DomPoint3", tab_style: "" }, { tab_menu: "控件4", anchor_point: "DomPoint4", tab_style: "" }] } }, fordiv: ['页面控件1', '页面控件2', '页面控件3', '页面控件4'] } } }  .div_<span style="color:transparent">来1源gaodai#ma#com搞*代#码1网</span>_header { width: 100%; height: 200px; background-color: #909; } .div__item { width: 100%; height: 400px; background-color: rgb(78, 215, 224); text-align: center; font-size: 26px; } .div__footer { width: 100%; height: 200px; background-color: #090; }