first commit

历届学生/front-end-team-10/项目练习/上课项目/枸杞社/js/page/index.js

@@ -0,0 +1,130 @@
+class Index {
+    constructor() {
+        this.index = 0;
+        this.principa = []
+        footer();
+        this.initSwiper();
+        this.getType().then(() => this.getIndex());
+        
+
+    }
+
+    async getType() {
+
+        // 本地无数值，那么发送请求
+        if (localStorage.getItem("principal") == null) {
+            var { principal, additional } = await indexService.type()
+            localStorage.setItem("principal", JSON.stringify(principal))
+            localStorage.setItem("additional", JSON.stringify(additional))
+        } else {
+            var principal = JSON.parse(localStorage.getItem("principal"))
+            var additional = JSON.parse(localStorage.getItem("additional"))
+        }
+      
+
+
+        this.principal = principal;
+
+        console.log(this.principal);
+
+        // TODO 改造这个代码，实现下面的作业
+        this.principal.forEach((v, i) => {
+            $(".header_menu ul").innerHTML += `<li class="${i == 0 ? 'active' : ''}">${v.title}</li>`;
+            $(".swiper .swiper-wrapper").innerHTML += `
+                <div class="swiper-slide">
+                    <div class="list">
+                    </div>
+                </div>
+            `;
+        });
+
+
+        click(".header_menu ul li", (v, i) => {
+            _(".header_menu ul li").forEach(v => v.classList.remove("active"))
+            v.classList.add("active")
+            this.index = i
+            this.getClassList()
+            this.mySwiper.slideTo(i)
+        })
+
+        _(".swiper .swiper-wrapper .swiper-slide").forEach((v,i) => {
+            if (i != 0) {
+                v.onscroll = () => {
+                    const {clientHeight, scrollHeight, scrollTop} = v;
+                    var distance = scrollHeight- scrollTop - clientHeight;
+                    if (distance <= 0.5) {
+                        this.principal[this.index].page += 1
+                        if (this.principal[this.index].page <= this.principal[this.index].total_page) {
+                            this.getClassList("loadMore")
+                        }
+                    }
+                }
+            }
+        })
+
+        // 作业：在utils里面 实现下面这种封装
+        // principal.html(".header_menu ul", (v,i) => {
+        //     return `<li class="${i == 0 ? 'active' : ''}">${v.title}</li>`
+        // })
+    }
+
+    async getIndex() {
+        var res = await indexService.index()
+        this.principal[this.index].content = res.list
+        item(
+            _(".swiper .swiper-wrapper .swiper-slide .list")[this.index],
+            this.principal[this.index].content
+        )
+    }
+
+    async getClassList(type = "click") {
+        
+
+        var getList = async () => {
+            var res = await indexService.classList({
+                page: this.principal[this.index].page,
+                id: this.principal[this.index].id
+            });
+            this.principal[this.index].content = [
+                ...this.principal[this.index].content,
+                ...res.data
+            ]
+            this.principal[this.index].total_page = res.total_page
+            console.log("getClassList: ", this.principal);
+
+            // 渲染页面（注意：把指定数组下标的content渲染到对应下标的 swiper-slide）
+            item(
+                _(".swiper .swiper-wrapper .swiper-slide .list")[this.index],
+                this.principal[this.index].content
+            )
+        }
+
+        
+        if (type == "click") {
+            if (this.principal[this.index].content.length == 0 && this.index != 0) {
+                getList();
+            }
+        } else {
+            getList();
+        }
+    }
+
+
+    initSwiper() {
+        var self = this;
+        this.mySwiper = new Swiper('.swiper', {
+            direction: 'horizontal',
+            on: {
+                slideChangeTransitionEnd: function () {
+                    _(".header_menu ul li").forEach(v => v.classList.remove("active"))
+                    _(".header_menu ul li")[this.activeIndex].classList.add("active")
+
+                    self.index = this.activeIndex
+                    self.getClassList()
+                },
+            },
+        })
+    }
+}
+
+new Index()