慕课小慕读书后台总结

我会带着你远行 2021-09-02 05:11 380阅读 0赞

1.  登录输入框，如果没有数据自动聚焦

mounted() { 
        if (this.loginForm.username === "") { 
          this.$refs.username.focus();
        } else if (this.loginForm.password === "") { 
          this.$refs.password.focus();
        }
      },

1.  密码框的显示影藏切换

:icon-class="passwordType === 'password' ? 'eye' : 'eye-open'"
      @click="showPwd"
       showPwd() { 
          if (this.passwordType === "password") { 
            this.passwordType = "";
          } else { 
            this.passwordType = "password";
          }
          this.$nextTick(() => { 
            this.$refs.password.focus();
          });
        },

1.  通过浅拷贝实现属性过滤

const _query = Object.assign({ }, query)
     delete _query.redirect

1.  对token的分类处理

const whiteUrl = ['/login']
    	
    service.interceptors.request.use(
     config => { 
       const url = config.url.replace(config.baseURL, '')
       if (whiteUrl.some(wl => url === wl)) { 
         return config
       }
       config.headers['Authorization'] = `Bearer ${ getToken()}`
       return config
     },

1.  token - cokie的封装

import Cookies from 'js-cookie'
    
    const TokenKey = 'Admin-Token'
    
    export function getToken() { 
     return Cookies.get(TokenKey)
    }
    
    export function setToken(token) { 
     return Cookies.set(TokenKey, token)
    }
    
    export function removeToken() { 
     return Cookies.remove(TokenKey)
    }
    
    使用
    
    import {  getToken, setToken, removeToken } from '@/utils/auth'
    setToken(data.token)

1.  对路由的监听

watch: { 
        $route: { 
          handler: function (route) { 
            const query = route.query;
            console.log("query", query);
            if (query) { 
              this.redirect = query.redirect;
              this.otherQuery = this.getOtherQuery(query);
            }
          },
          immediate: true,
        },
      },

1.  表格排序 + 搜索通用 + 搜索高亮

@sort-change="sortChange"
    
        sortChange(data) { 
          console.log("data", data);
          const {  prop, order } = data;
          if (prop === "id") { 
            this.sortByID(order);
          }
        },
        sortByID(order) { 
          console.log("this.listQuery", this.listQuery);
          if (order === "ascending") { 
            this.listQuery.sort = "+id";
          } else { 
            this.listQuery.sort = "-id";
          }
          this.handleFilter();
        },
    handleFilter() { 
          console.log("listQuery", this.listQuery);
          this.listQuery.page = 1;
          this.refresh();
        },
    
     refresh() { 
          this.$router.push({ 
            path: "/book/list",
            query: this.listQuery,
          });
        },
        
          beforeRouteUpdate(to, from, next) { 
        console.log("to", to.path);
        console.log("from", from.path);
        console.log("next", next.path);
        if (to.path === from.path) { 
          const newQuery = Object.assign({ }, to.query);
          const oldQuery = Object.assign({ }, from.query);
          console.log("newQuery", newQuery);
          console.log("oldQuery", oldQuery);
          console.log("oldQuery", JSON.stringify(oldQuery));
          console.log("newQuery", JSON.stringify(newQuery));
          if (JSON.stringify(newQuery) !== JSON.stringify(oldQuery)) { 
            console.log("等不等");
            this.getList();
          }
        }
        next();
      },
      getList() { 
          this.listLoading = true;
          listBook(this.listQuery).then((response) => { 
            const {  data, total } = response;
            this.list = data;
            this.total = total;
            this.listLoading = false;
            console.log("lisk", this.list);
            this.list.forEach((book) => { 
              book.titleWrapper = this.wrapperKeyword("title", book.title);
              book.authorWrapper = this.wrapperKeyword("author", book.author);
            });
          });
        },
        wrapperKeyword(k, v) { 
          function highlight(value) { 
            return '<span style="color: #1890ff">' + value + "</span>";
          }
          if (!this.listQuery[k]) { 
            return v;
          } else { 
            return v.replace(new RegExp(this.listQuery[k], "ig"), (v) =>
              highlight(v)
            );
          }
        },

1.  过滤器

filters: { 
        valueFilter(value) { 
          return value ? value : "无";
        },
        }

1.  表格里的数据结构 和图片打开

1.  分页器二次封装

<template>
      <div :class="{'hidden':hidden}" class="pagination-container">
        <el-pagination
          :background="background"
          :current-page.sync="currentPage"
          :page-size.sync="pageSize"
          :layout="layout"
          :page-sizes="pageSizes"
          :total="total"
          v-bind="$attrs"
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
        />
      </div>
    </template>
    
    <script>
    import {  scrollTo } from '@/utils/scroll-to'
    
    export default { 
      name: 'Pagination',
      props: { 
        total: { 
          required: true,
          type: Number
        },
        page: { 
          type: Number,
          default: 1
        },
        limit: { 
          type: Number,
          default: 20
        },
        pageSizes: { 
          type: Array,
          default() { 
            return [10, 20, 30, 50]
          }
        },
        layout: { 
          type: String,
          default: 'total, sizes, prev, pager, next, jumper'
        },
        background: { 
          type: Boolean,
          default: true
        },
        autoScroll: { 
          type: Boolean,
          default: true
        },
        hidden: { 
          type: Boolean,
          default: false
        }
      },
      computed: { 
        currentPage: { 
          get() { 
            return this.page
          },
          set(val) { 
            this.$emit('update:page', val)
          }
        },
        pageSize: { 
          get() { 
            return this.limit
          },
          set(val) { 
            this.$emit('update:limit', val)
          }
        }
      },
      methods: { 
        handleSizeChange(val) { 
          this.$emit('pagination', {  page: this.currentPage, limit: val })
          if (this.autoScroll) { 
            scrollTo(0, 800)
          }
        },
        handleCurrentChange(val) { 
          this.$emit('pagination', {  page: val, limit: this.pageSize })
          if (this.autoScroll) { 
            scrollTo(0, 800)
          }
        }
      }
    }
    </script>
    
    <style scoped>
    .pagination-container { 
      background: #fff;
      padding: 32px 16px;
    }
    .pagination-container.hidden { 
      display: none;
    }
    </style>
    
    使用
     <pagination
          v-show="total > 0"
          :total="total"
          :page.sync="listQuery.page"
          :limit.sync="listQuery.pageSize"
          @pagination="refresh"
        />

1.  新手引导

https://www.jianshu.com/p/8cdef1041086

1.  表格固定最后一列

fixed="right"

1.  吸顶组件

<template>
      <div :style="{height:height+'px',zIndex:zIndex}">
        <div
          :class="className"
          :style="{top:(isSticky ? stickyTop +'px' : ''),zIndex:zIndex,position:position,width:width,height:height+'px'}"
        >
          <slot>
            <div>sticky</div>
          </slot>
        </div>
      </div>
    </template>
    
    <script>
    export default { 
      name: 'Sticky',
      props: { 
        stickyTop: { 
          type: Number,
          default: 0
        },
        zIndex: { 
          type: Number,
          default: 1
        },
        className: { 
          type: String,
          default: ''
        }
      },
      data() { 
        return { 
          active: false,
          position: '',
          width: undefined,
          height: undefined,
          isSticky: false
        }
      },
      mounted() { 
        this.height = this.$el.getBoundingClientRect().height
        window.addEventListener('scroll', this.handleScroll)
        window.addEventListener('resize', this.handleResize)
      },
      activated() { 
        this.handleScroll()
      },
      destroyed() { 
        window.removeEventListener('scroll', this.handleScroll)
        window.removeEventListener('resize', this.handleResize)
      },
      methods: { 
        sticky() { 
          if (this.active) { 
            return
          }
          this.position = 'fixed'
          this.active = true
          this.width = this.width + 'px'
          this.isSticky = true
        },
        handleReset() { 
          if (!this.active) { 
            return
          }
          this.reset()
        },
        reset() { 
          this.position = ''
          this.width = 'auto'
          this.active = false
          this.isSticky = false
        },
        handleScroll() { 
          const width = this.$el.getBoundingClientRect().width
          this.width = width || 'auto'
          const offsetTop = this.$el.getBoundingClientRect().top
          if (offsetTop < this.stickyTop) { 
            this.sticky()
            return
          }
          this.handleReset()
        },
        handleResize() { 
          if (this.isSticky) { 
            this.width = this.$el.getBoundingClientRect().width + 'px'
          }
        }
      }
    }
    </script>
    
     <sticky :z-index="10" :class-name="'sub-navbar ' + postForm.status">
            <el-button v-if="!isEdit" @click.prevent.stop="showGuide"
              >显示帮助</el-button
            >
            <el-button
              v-loading="loading"
              style="margin-left: 10px"
              type="success"
              class="submit-btn"
              @click="submitForm"
            >
              { {  isEdit ? "编辑电子书" : "新增电子书" }}
            </el-button>
          </sticky>

1.  上传组件的封装
2.  多数据表单的设置  
    假设表单有很多数据，需要在请求回数据，填写。那我们都要把这些数据，设置成响应式吗？  
    写一个方法

this.setData(data);

在方法里赋值

setData(data) { 
          const { 
            title
          } = data;
          this.postForm = { 
            title
          };
          数据清空
           toDefault() { 
          this.postForm = Object.assign({ }, defaultForm);
          this.fileList = [];
          this.contentsTree = [];
        },

1.  表单数据校验，多级数据做数据的映射