Vue常用工具类方法 总结

1.利用Cookie,来设置接口携带的‘token’

执行命令npm install js-cookie,在js工具类中引入,

/** @format */

import Cookie from 'js-cookie';

function getToken() {
  return Cookie.get('token');
}

function setToken(token) {
  Cookie.set('token', token);
}

function removeToken() {
  Cookie.remove('token');
}

export default {
  getToken,
  setToken,
  removeToken
};

 

2.利用日期moment.js工具,来完成对周次以及星期的处理 ,包含了 获取一年的每周的周次,以及每周的开始日期,结束日期,以及当前属于星期几等方法
执行npm install moment.js
/** @format */

import moment from 'moment';
//获取前一周的开始时间,结束时间,以及周数
function getPreWeek(week) {
  if (isParamBlank(week)) {
    return;
  }
  var startDate = moment()
    .week(week - 1)
    .startOf('week')
    .add(1, 'days')
    .format('YYYY-MM-DD'); //这样是年月日的格式
  var endDate = moment()
    .week(week - 1)
    .endOf('week')
    .add(1, 'days')
    .format('YYYY-MM-DD');
  var weekCount = moment(moment(startDate).subtract(1, 'days')).weeks();
  var preWeekInfo = {
    startDate: startDate,
    endDate: endDate,
    weekCount: weekCount
  };
  return preWeekInfo;
}

// 获取下一周的起始日期和结束日期,以及周数
function getNextWeek(week) {
  if (isParamBlank(week)) {
    return;
  }
  var startDate = moment()
    .week(week + 1)
    .startOf('week')
    .add(1, 'days')
    .format('YYYY-MM-DD'); //这样是年月日的格式
  var endDate = moment()
    .week(week + 1)
    .endOf('week')
    .add(1, 'days')
    .format('YYYY-MM-DD');
  var weekCount = moment(moment(startDate).subtract(1, 'days')).weeks();
  var nextWeekInfo = {
    startDate: startDate,
    endDate: endDate,
    weekCount: weekCount
  };
  return nextWeekInfo;
}

// 根据传入参数,获取周次信息
function getWeekInfoByDate(param) {
  if (isParamBlank(param)) {
    // 当前时间所在周数
    return;
  }
  var date = moment(param);
  var startDate = moment()
    .week(moment(date).week())
    .startOf('week')
    .add(1, 'days')
    .format('YYYY-MM-DD'); //这样是年月日的格式
  var endDate = moment()
    .week(moment(date).week())
    .endOf('week')
    .add(1, 'days')
    .format('YYYY-MM-DD');
  var weekCount = moment(moment(startDate).subtract(1, 'days')).weeks();
  // 获取当前的周次 , 如果不穿参数,则表示当前的周数 ,如果传入时间,则表示 该时间段所在的周数
  //因为是基于moment.js  起始时间还是从周日开始算的 ,所以需要在现有的基础上减去一天 ,这样也是为了防止边界情况出错
  var weekInfo = {
    startDate: startDate,
    endDate: endDate,
    weekCount: weekCount
  };
  return weekInfo;
}

//  获取一年中的总周次
function getWeekTotalInYear() {
  return moment().weeksInYear();
}

//校验参数是否为空
function isParamBlank(param) {
  if (typeof param == 'undefined' || param == null || param.length == 0) {
    return true;
  }
  return false;
}

// 获取当前周的周数以及该周的开始时间和结束时间
function getCurrentWeekInfo() {
  // var weekCount = moment( moment(moment().week(moment().week()).startOf('week')).subtract(1,'days')).weeks();
  var weekCount = moment(moment().subtract(1, 'days')).weeks();
  var startDate = moment()
    .week(weekCount)
    .startOf('week')
    .add(1, 'days')
    .format('YYYY-MM-DD'); //这样是年月日的格式
  var endDate = moment()
    .week(weekCount)
    .endOf('week')
    .add(1, 'days')
    .format('YYYY-MM-DD');
  var currentWeekInfo = {
    startDate: startDate,
    endDate: endDate,
    weekCount: weekCount
  };
  return currentWeekInfo;
}

function getDayByWeekDay(week, weekNum) {
  if (isParamBlank(week) && isParamBlank(weekNum)) {
    return;
  }
  return moment()
    .week(week)
    .startOf('week')
    .add(weekNum, 'days')
    .format('YYYY-MM-DD'); //这样是年月日的格式
}

//start of 2019-2-18 新增

//为了解决点击上一周和下一周的 边界值情况,新增以下两个函数

//点击上一周
function clickPreIconGetPreWeek(week, currentWeekStartTime) {
  if (isParamBlank(week) && isParamBlank(currentWeekStartTime)) {
    return;
  }
  var startDate = moment(currentWeekStartTime)
    .subtract(7, 'days')
    .format('YYYY-MM-DD');
  var endDate = moment(startDate)
    .add(6, 'days')
    .format('YYYY-MM-DD');
  var weekCount = moment(moment(startDate).subtract(1, 'days')).weeks();
  var preWeekInfo = {
    startDate: startDate,
    endDate: endDate,
    weekCount: weekCount
  };
  return preWeekInfo;
}

//点击下一周
function clickNextIconGetNextWeek(
  week,
  currentWeekStartTime,
  currentWeekEndTime
) {
  if (isParamBlank(week) && isParamBlank(currentWeekEndTime)) {
    return;
  }
  var startDate = moment(currentWeekStartTime)
    .add(7, 'days')
    .format('YYYY-MM-DD');
  var endDate = moment(startDate)
    .add(6, 'days')
    .format('YYYY-MM-DD');
  var weekCount = moment(moment(startDate).subtract(1, 'days')).weeks();
  var nextWeekInfo = {
    startDate: startDate,
    endDate: endDate,
    weekCount: weekCount
  };
  return nextWeekInfo;
}

//end  of 2019-2-18 新增

export const dateUtils = {
  getPreWeek: getPreWeek,
  clickPreIconGetPreWeek: clickPreIconGetPreWeek,
  clickNextIconGetNextWeek: clickNextIconGetNextWeek,
  getNextWeek: getNextWeek,
  getWeekTotalInYear: getWeekTotalInYear,
  getCurrentWeekInfo: getCurrentWeekInfo,
  getWeekInfoByDate: getWeekInfoByDate,
  getDayByWeekDay: getDayByWeekDay
};

  

 


3.vue自定义指令工具类,vue的全局自定义指令,
例如:当从一个获取到焦点的input框 点击另一个input框时,这个被点击的input框不会自动获取到焦点,这个时候就可以利用Vue.directive()自定义指令
  
/** @format */
/*Vue全局指令*/
import Vue from 'vue';
/**
 * Vue 跳转指令'v-jump',基于router.push方式
 * @param name/path 路由名或路径(必传)[eg:home或/home]
 * @param param 参数[eg:{id:123}]
 * @param type  按什么方式传递参数[1-按路由配置方式[eg:home/123];2-按param方式[eg:{name/path:'',params:{id:123}}];3-按query方式(默认)[eg:{name/path:'',query:{id:123}}]]
 * 例子:<div class="click-wrap" :data-id="item.id" v-jump="['home_detail', {id:123}, 2]">
 */
Vue.directive('jump', {
  // el: 指令绑定的元素
  // vm: 拥有该指令的上下文 ViewModel
  // expression: 指令的表达式,不包括参数和过滤器
  // arg: 指令的参数
  // raw: 未被解析的原始表达式
  // name: 不带前缀的指令名
  bind: function(el, binding, vnode) {
    // 做绑定的准备工作(比如添加事件监听器,或是其他只需要执行一次的复杂操作)

    // 若和v-for指令共用,由于v-for的就地重用机制,需要指定一个唯一的key属性(对应vnode.key),如果没有指定,这里需要修改
    vnode.key = Math.round(Math.random() * 12568);

    el.handler = function() {
      let data = binding.value || null;
      if (data) {
        let vm = vnode.context;
        let pathName = data[0] || null;
        let param = data[1] || null;
        let type = data[2] || 3;
        // console.log('v-jump数据:', pathName, param, type);
        if (pathName) {
          if (type === 1) {
            /*path类型单独处理参数格式*/
            if (param) {
              var pStr = [];
              for (let j in param) {
                if (param.hasOwnProperty(j)) {
                  param[j] ? pStr.push(param[j]) : null;
                }
              }
            }
            vm.$router.push({
              path: '/' + pathName + (param ? '/' + pStr.join('/') : '')
            });
          }
          if (type === 2) {
            vm.$router.push({ name: pathName, params: param });
          }
          if (type === 3) {
            vm.$router.push({ path: '/' + pathName, query: param });
          } else {
            if (pathName.indexOf('/') > -1) {
              vm.$router.push({ path: pathName });
            } else {
              vm.$router.push({ name: pathName });
            }
          }
        } else {
          console.warn('好歹给个页面名啊!');
        }
      } else {
        console.error('v-jump似乎还需要点什么!');
      }
    };
    /*为Dom绑定事件*/
    el.addEventListener('click', el.handler, false);
  },
  update: function(newValue, oldValue) {
    // 根据获得的新值执行对应的更新(对于初始值也会被调用一次)
  },
  unbind: function(el) {
    // 做清理工作(比如移除在 bind() 中添加的事件监听器)
    /*为Dom移除事件*/
    el.removeEventListener('click', el.handler);
  }
});
/**
 * Vue 指令'v-open',打开新页面
 * @param name/path 路由名或路径(必传)[eg:home或/home]
 * @param param 参数[eg:{id:123}]
 * 例子:<div class="click-wrap" :data-id="item.id" v-open="['home_detail', {id:123}]">
 */
Vue.directive('open', {
  bind: function(el, binding, vnode) {
    vnode.key = new Date().getTime() * 3579;
    el.handler = function() {
      let data = binding.value || null;
      if (data) {
        let vm = vnode.context;
        let pathName = data[0] || null;
        let param = data[1] || null;
        // console.log('v-open数据:', pathName, param);
        let routeData = vm.$router.resolve({
          name: '新页面打开',
          path: pathName,
          query: param
        });
        window.open(routeData.href, '_blank');
      } else {
        console.error('v-open似乎还需要点什么!');
      }
    };
    el.addEventListener('click', el.handler, false);
  },
  unbind: function(el) {
    el.removeEventListener('click', el.handler);
  }
});
/**
 * Vue input限制只能输入正整数(可控制最小最大值)
 * 例子:<input type="text" v-integer="{min:1, max:10}">
 */
Vue.directive('integer', {
  bind: function(el, binding) {
    let attr = binding.value; //传入的参数
    /* var position = binding.modifiers; //获取对象数组,使用需要遍历
    var warning = binding.arg; //获取true属性 */
    // console.log(attr);
    el.handler = function() {
      el.value = el.value.replace(/\D+/, '');
      attr.max !== undefined
        ? el.value > attr.max
          ? (el.value = attr.max)
          : null
        : null;
      attr.min !== undefined
        ? el.value < attr.min
          ? (el.value = attr.min)
          : null
        : null;
    };
    el.addEventListener('input', el.handler);
  },
  unbind: function(el) {
    el.removeEventListener('input', el.handler);
  }
});

/**
 * Vue 页面显示input框时自动获取焦点
 * 例子:
 */
Vue.directive('myfocus', {
  inserted: function(el, binding) {
    // console.log(el);
    // let mtinput = el.querySelector('input');
    el.focus();
  }
});
/* Vue.directive('blur', {
  bind: function(el, binding, vnode) {
    let mtinput = el.querySelector('input');
    mtinput.onfocus = function() {
      //如果要对节点的数据进行更改,且更改要映射到页面上,则更改可在vnode.context上进行,这样,改完之后,改变就会映射到页面
    };
    mtinput.onblur = function() {
      //同上理
    };
  },
  unbind: function(el) {
    el.removeEventListener('input', el.handler);
  }
}); */

  

4.vue支持render渲染函数,
例如:vue+elemetn-ui 里面的table跟render进行搭配简化代码

在expand.js文件中这样写:
/** @format */
export default {
  name: 'TableExpand',
  functional: true,
  props: {
    row: Object,
    render: Function,
    index: Number,
    column: {
      type: Object,
      default: null
    }
  },
  render: (h, ctx) => {
    const params = {
      row: ctx.props.row,
      index: ctx.props.index
    };
    if (ctx.props.column) params.column = ctx.props.column;
    return ctx.props.render(h, params);
  }
};

在common-table.vue文件中这样写

<!-- @format -->

<template>
  <div class="common-table">
    <el-table
      :data="tableData"
      @selection-change="handleSelectionChange"
      @sort-change="handleSortChange"
      stripe
      border
      :show-summary="summary.enable"
      :sum-text="summary.text"
    >
      <template v-for="item in columnsData">
        <template v-if="item.type === 'options'">
          <el-table-column
            :key="item.prop"
            :prop="item.prop"
            :label="item.label"
            :width="item.width"
            :sortable="item.sortable"
            :type="item.type"
            :show-overflow-tooltip="item.tooltip"
          >
            <template slot-scope="scope">
              <expand :render="item.render" :row="scope.row" :column="item">
              </expand>
            </template>
          </el-table-column>
        </template>
        <template v-else>
          <el-table-column
            :key="item.prop"
            :prop="item.prop"
            :label="item.label"
            :width="item.width"
            :sortable="item.sortable"
            :type="item.type"
            :show-overflow-tooltip="item.tooltip"
            :formatter="item.formatter"
            :selectable="item.selectable"
          >
          </el-table-column>
        </template>
      </template>
    </el-table>
  </div>
</template>

<script>
/* 添加  render函数扩展 */
import Expand from '@/utils/expand';

export default {
  name: 'ComTable',
  components: { Expand },
  props: {
    columnsData: {
      type: Array,
      default: () => {
        return [];
      },
      required: true
    },
    tableData: {
      type: Array,
      default: () => {
        return [];
      },
      required: true
    },
    summary: {
      type: Object,
      default: () => {
        return {
          enable: false,
          text: '合计'
        };
      }
    }
  },
  data() {
    return {
      multipleSelection: []
    };
  },
  methods: {
    /**
     * 点击三角形排序
     * @param column
     */
    handleSortChange(column) {
      this.$emit('sortChange', column);
    },
    /**
     * 实时获取选择数据数组
     * @param val
     */
    handleSelectionChange(val) {
      this.multipleSelection = val;
      this.$emit('selectionChange', val);
    }
  }
};
</script>

<style scoped lang="less">
.common-table {
  margin: 20px 0;
  a.button {
    margin-top: 20px;
    height: 30px;
    line-height: 30px;
    width: 76px;
    text-align: center;
    border-radius: 2px;
    border: 1px solid #1d91ff;
    color: #1d91ff;
    background-color: #fff;
    float: left;
  }
  /deep/.el-table {
    thead {
      th {
        background-color: #f9fafb !important;
      }
    }
  }
  /deep/ .btn-option {
    cursor: pointer;
    margin-right: 10px;
    color: #349dff;
  }
  /deep/ .disabled {
    cursor: not-allowed;
    margin-right: 10px;
    color: #999;
  }
  /deep/ .btn-option:last-child {
    margin-right: 0px;
  }
}
</style>

  在业务代码中需要引用 common-tab.vue,这样写:

<!-- @format -->
<!--  区管-系统管理 -资讯管理 页 -->

<template>
  <div class="room-manage">
    <div class="search-form clearfix">
      <el-form :inline="true">
        <el-form-item label="资讯类型:">
          <el-select v-model="param.columnCode" placeholder="请选择资讯类型">
            <el-option
              v-for="(item, index) in typeList"
              :key="index"
              :label="item.label"
              :value="item.value"
            ></el-option>
          </el-select>
        </el-form-item>
        <el-form-item label="发布者:">
          <el-input
            v-model="param.author"
            placeholder="请输入发布者姓名"
            clearable
          ></el-input>
        </el-form-item>
        <el-form-item label="资讯标题:">
          <el-input
            v-model="param.title"
            placeholder="请输入资讯标题"
            clearable
          ></el-input>
        </el-form-item>
        <el-form-item label="是否置顶:">
          <el-select
            v-model="param.isTop"
            placeholder="是否置顶"
            style="width: 100px;"
          >
            <el-option label="全部" value=""></el-option>
            <el-option label="是" :value="0"></el-option>
            <el-option label="否" :value="1"></el-option>
          </el-select>
        </el-form-item>
        <el-form-item>
          <el-button type="warning" size="medium" @click="handleSearchList"
            >查询</el-button
          >
          <el-button
            type="warning"
            size="medium"
            @click="operation(1)"
            v-if="adminType === 'manage'"
            >添加资讯</el-button
          >
          <el-button
            type="warning"
            size="medium"
            @click="operation(4)"
            v-if="adminType === 'manage'"
            >删除</el-button
          >
        </el-form-item>
      </el-form>
    </div>
    <div class="room-cont">
      <common-table
        :columnsData="columnsData"
        :tableData="tableData"
        v-loading="loading"
        @selectionChange="tableSelectChange"
      ></common-table>
      <pagenation
        :pageInfo="pager"
        @getNewPage="pageChange"
        v-if="tableData.length"
      ></pagenation>
    </div>
  </div>
</template>

<script>
import CommonTable from '@/components/common/common-table';
import Pagenation from '@/components/common/pagenation';
import { timeFormat } from '@/utils/index';
import { mapState } from 'vuex';
export default {
  name: 'room-manage',
  components: { CommonTable, Pagenation },
  data() {
    return {
      loading: false, //是否正在加载
      param: {
        page: 1,
        pageSize: 10,
        columnCode: '',
        title: '',
        isTop: '',
        author: ''
      }, //参数
      pager: {
        total: 0, //总条数
        pageNum: 1, //当前页码
        pageSize: 10 //每页条数
      }, //分页参数
      typeList: [
        { label: '全部', value: '' },
        { label: '图片新闻', value: '01' },
        { label: '通知公告', value: '02' },
        { label: '工作动态', value: '03' },
        { label: '教育资讯', value: '04' }
      ],
      chooseData: [], //选择的列表数据
      columnsData: [
        {
          label: '#',
          type: 'selection'
        },
        {
          label: '序号',
          type: 'index'
        },
        {
          label: '资讯标题',
          prop: 'title',
          width: 300,
          showOverflowTooltip: true
        },
        {
          label: '资讯类型',
          prop: 'columnName'
        },
        {
          label: '发布者',
          prop: 'author'
        },
        {
          label: '发布时间',
          prop: 'createTime',
          formatter: row => {
            return row.createTime ? timeFormat(row.createTime) : '--';
          }
        },
        {
          label: '是否置顶',
          prop: 'isTop',
          formatter: row => {
            return row.isTop ? '否' : '是';
          }
        },
        {
          type: 'options',
          label: '操作',
          align: 'center',
          width: 150,
          render: (h, { row }) => {
            const checkBtn = h(
              'a',
              {
                class: 'btn-option',
                on: {
                  click: () => {
                    this.operation(0, row); //预览
                  }
                }
              },
              '预览'
            );
            const editBtn = h(
              'a',
              {
                class: 'btn-option',
                on: {
                  click: () => {
                    this.operation(2, row); //修改
                  }
                }
              },
              '修改'
            );
            const deleteBtn = h(
              'a',
              {
                class: 'btn-option',
                on: {
                  click: () => {
                    this.operation(3, row); //删除
                  }
                }
              },
              '删除'
            );

            let operationViews = [];
            operationViews.push(checkBtn);
            if (this.adminType === 'manage') {
              operationViews.push(editBtn);
              operationViews.push(deleteBtn);
            }
            return h(
              'div',
              {
                class: 'table-opt-btns'
              },
              operationViews
            );
          }
        }
      ], //表头数据
      tableData: [] //表格数据
    };
  },
  watch: {
    'param.page'(n) {
      this.pager.pageNum = n;
    }
  },
  computed: {
    ...mapState({
      adminType: state => state.user.adminType
    })
  },
  mounted() {
    this.getList();
  },
  methods: {
    /**
     * 获取列表
     * @page {Number} 页码
     */
    getList(page) {
      this.param.page = page || 1;
      this.loading = true;
      this.$api['course/getNewsList'](this.param)
        .then(res => {
          this.loading = false;
          this.tableData = res.list;
          this.pager.total = res.total;
        })
        .catch(err => {
          this.loading = false;
          this.$toast(err, 3);
        });
    },
    /* 查询  */
    handleSearchList() {
      this.getList();
    },
    /* 表格选择  */
    tableSelectChange(val) {
      this.chooseData = val;
    },
    /**
     * 表格操作
     * @type {Number} 操作类型,0-查看,1-添加,2-修改,3-删除,4-批量删除
     * @id {Number} 数据Id
     */
    operation(type, data) {
      if (type) {
        if (type === 1) {
          // 新增
          this.$router.push('/newsEdit');
        } else if (type === 2) {
          // 编辑
          this.$router.push({
            path: '/newsEdit',
            query: {
              newsId: data.id
            }
          });
        } else if (type === 3) {
          // 删除
          this.del(data.id);
        } else {
          // 批量删除
          this.del('batch');
        }
      } else {
        // 查看
        this.$router.push({
          path: '/newsDetail',
          query: {
            newsId: data.id,
            from: 'newsManage'
          }
        });
      }
    },
    /**
     * 删除
     * @data {Any} 数据Id/类型
     */
    del(data) {
      let ids = [data];
      if (data === 'batch') {
        if (this.chooseData.length) {
          ids = this.chooseData.map(cur => cur.id);
        } else {
          this.$toast('至少选择一条记录!', 2);
          return false;
        }
      }
      this.$confirm(
        '此操作将删除' +
          (data !== 'batch' ? '该条' : '已选择的') +
          '资讯, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      )
        .then(() => {
          this.$api['course/deleteNews']({
            ids
          })
            .then(res => {
              this.$message.success('删除成功');
              this.getList();
            })
            .catch(err => {
              this.$message.error(err);
            });
        })
        .catch(err => {});
    },
    /**
     * 翻页
     * @data {Number} 页码
     */
    pageChange(data) {
      this.getList(data);
    }
  }
};
</script>

<style scoped lang="less">
.search-form {
  text-align: left;
  margin-top: 20px;
}
.room-cont {
  /deep/.el-table .el-table__row td .cell {
    font-size: 12px;
  }
  /deep/.el-table .el-table__row td:first-child .cell {
    font-size: 14px;
  }
}
</style>

  


5.vue全局过滤函数,
!切记一定要在最外层的main.js或者是index.js里面 引入该filter.js文件
例如:将日期时间戳转化为字符串时间,

{{ item.startTime | timeFormat('yyyy-MM-dd HH:mm') }} -
{{ item.endTime | timeFormat('HH:mm') }}
/** @format */

import Vue from 'vue';
/**
 * 时间戳转日期格式
 * @param data {number} 时间戳
 * @param format {string} 时间格式[完整格式:yyyy-MM-dd HH:mm:ss,默认yyyy-MM-dd]
 * @param implementText {string} 缺省文字
 */
const timeFormat = function(data, format, implementText) {
  if (data === null || data === '' || data === undefined) {
    return implementText || '';
  }
  format = format || 'yyyy-MM-dd';
  let week = [
    '星期日',
    '星期一',
    '星期二',
    '星期三',
    '星期四',
    '星期五',
    '星期六'
  ];
  let date = new Date(data);
  let o = {
    'M+': date.getMonth() + 1,
    'd+': date.getDate(),
    'h+': date.getHours() % 12,
    'H+': date.getHours(),
    'm+': date.getMinutes(),
    's+': date.getSeconds(),
    'q+': Math.floor((date.getMonth() + 3) / 3),
    'S+': date.getMilliseconds(),
    'W+': week[date.getDay()]
  };
  if (/(y+)/.test(format))
    format = format.replace(
      RegExp.$1,
      (date.getFullYear() + '').substr(4 - RegExp.$1.length)
    );
  for (let k in o)
    if (new RegExp('(' + k + ')').test(format))
      format = format.replace(
        RegExp.$1,
        RegExp.$1.length === 1 ? o[k] : ('00' + o[k]).substr(('' + o[k]).length)
      );
  return format;
};
Vue.filter('timeFormat', timeFormat);
/**
 * 年级code转年级名称
 * @param data 数值
 * @param implementText 缺省文案
 */
Vue.filter('revealGradeName', function(data, implementText) {
  if (data) {
    const gradeList = JSON.parse(sessionStorage.getItem('staticGrades'));
    return gradeList.filter(cur => cur.id === data)[0].name || '';
  } else {
    return implementText || '';
  }
});
/**
 * 学段code转学段名称
 * @param data 数值
 * @param implementText 缺省文案
 */
Vue.filter('revealPhaseName', function(data, implementText) {
  return data
    ? {
        '03': '小学',
        '04': '初中',
        '05': '高中'
      }[data]
    : implementText || '';
});
/**
 * 学科code转学科名称
 * @param data 数值
 * @param implementText 缺省文案
 */
Vue.filter('revealSubjectName', function(data, implementText) {
  if (data) {
    const subjectList = JSON.parse(sessionStorage.getItem('staticSubjects'));
    return subjectList.filter(cur => cur.id === data)[0].name || '';
  } else {
    return implementText || '';
  }
});
/**
 * 保留小数位
 * @param data 数值
 * @param len 保留的位数
 */
Vue.filter('toFixed', function(data, len) {
  if (data) {
    typeof data === 'string' ? (data = Number(data)) : null;
    return data ? data.toFixed(len || 2) : data;
  } else {
    return 0;
  }
});
Vue.prototype.$timeFormat = timeFormat;


6.vue的utils.js工具类常用方法,
!切记一定要在最外层的main.js或者是index.js里面 引入该utils.js文件
例如:浅拷贝 ,深拷贝,数据处理 等方法,

/**
 * 将秒数转为时间格式
 *
 * @format
 * @param data {number} 时间戳
 * @param format {string} 时间格式[完整格式:yyyy-MM-dd HH:mm:ss,默认yyyy-MM-dd]
 * @param implementText {string} 缺省文字
 */
export function timeFormat(data, format, implementText) {
  if (data === null || data === '' || data === undefined) {
    return implementText || '';
  }
  format = format || 'yyyy-MM-dd';
  let week = [
    '星期日',
    '星期一',
    '星期二',
    '星期三',
    '星期四',
    '星期五',
    '星期六'
  ];
  let date = new Date(data);
  let o = {
    'M+': date.getMonth() + 1,
    'd+': date.getDate(),
    'h+': date.getHours() % 12,
    'H+': date.getHours(),
    'm+': date.getMinutes(),
    's+': date.getSeconds(),
    'q+': Math.floor((date.getMonth() + 3) / 3),
    'S+': date.getMilliseconds(),
    'W+': week[date.getDay()]
  };
  if (/(y+)/.test(format))
    format = format.replace(
      RegExp.$1,
      (date.getFullYear() + '').substr(4 - RegExp.$1.length)
    );
  for (let k in o)
    if (new RegExp('(' + k + ')').test(format))
      format = format.replace(
        RegExp.$1,
        RegExp.$1.length === 1 ? o[k] : ('00' + o[k]).substr(('' + o[k]).length)
      );
  return format;
}

/**
 * 将字符串时间转换为时间戳
 * @param {string} date
 */
export function getDateTime(date) {
  let timestamp = '';
  if (date) {
    date = date.substring(0, 19);
    date = date.replace(/-/g, '/'); //必须把日期'-'转为'/'
    timestamp = new Date(date).getTime();
  }
  return timestamp;
}
/**
 * 获取年-月-日
 * @data {Any} 时间戳
 */
export function getDates(data) {
  let timeObj = {};
  data = new Date(data);
  let y = data.getFullYear();
  let m =
    data.getMonth() + 1 < 10
      ? '0' + (data.getMonth() + 1)
      : data.getMonth() + 1;
  let d = data.getDate() < 10 ? '0' + data.getDate() : data.getDate();
  let w = data.getDay();
  switch (w) {
    case 1:
      w = '星期一';
      break;
    case 2:
      w = '星期二';
      break;
    case 3:
      w = '星期三';
      break;
    case 4:
      w = '星期四';
      break;
    case 5:
      w = '星期五';
      break;
    case 6:
      w = '星期六';
      break;
    case 7:
      w = '星期日';
      break;
  }
  let h = data.getHours() < 10 ? '0' + data.getHours() : data.getHours();
  let mi = data.getMinutes() < 10 ? '0' + data.getMinutes() : data.getMinutes();
  let s = data.getSeconds() < 10 ? '0' + data.getSeconds() : data.getSeconds();
  timeObj = {
    year: y + '',
    month: m + '',
    day: d + '',
    week: w + '',
    hour: h + '',
    minute: mi + '',
    second: s + ''
  };
  return timeObj;
}
/**
 * 异常处理
 * @param {boolean} condition
 * @param {string} msg
 */
export function assert(condition, msg) {
  if (!condition) throw new Error(`[Apior] ${msg}`);
}

/**
 * URL编码;
 * @param {参数} param
 */
export function toParams(param) {
  let result = '';
  for (let name in param) {
    if (typeof param[name] != 'function') {
      if (param[name] === null) {
        result += '&' + name + '=';
      } else {
        result += '&' + name + '=' + encodeURI(param[name]);
      }
    }
  }
  return result.substring(1);
}
/**
 * 防抖函数
 * @param fn 高频函数
 * @param wait 等待时间
 * @returns {Function}
 */
export function debounce(fn, wait) {
  let context = this,
    args = arguments,
    timer = null;
  return function() {
    context = this;
    args = arguments;
    clearTimeout(timer);
    timer = setTimeout(function() {
      fn.apply(context, args);
    }, wait || 250);
  };
}
/**
 * 树形数据转换
 * @param {*} data
 * @param {*} id
 * @param {*} pid
 */
export function treeDataTranslate(data) {
  // 删除 所有 children,以防止多次调用
  data.forEach(function(item) {
    delete item.children;
  });

  // 将数据存储为 以 id 为 KEY 的 map 索引数据列
  var map = {};
  data.forEach(function(item) {
    map[item.id] = item;
  });
  //        console.log(map);
  var val = [];
  data.forEach(function(item) {
    // 以当前遍历项,的pid,去map对象中找到索引的id
    var parent = map[item.pid];
    // 好绕啊,如果找到索引,那么说明此项不在顶级当中,那么需要把此项添加到,他对应的父级中
    if (parent) {
      (parent.children || (parent.children = [])).push(item);
    } else {
      //如果没有在map中找到对应的索引ID,那么直接把 当前的item添加到 val结果集中,作为顶级
      val.push(item);
    }
  });
  return val;
}

/**
 * 对象深拷贝
 * @param  obj 对象
 */
export function cloneObj(obj) {
  let str;
  let newObj = obj.constructor === Array ? [] : {};
  if (
    Object.prototype.toString.call(obj) !== '[object Object]' &&
    Object.prototype.toString.call(obj) !== '[object Array]'
  ) {
    return;
  } else if (window.JSON) {
    str = JSON.stringify(obj); // 系列化对象
    newObj = JSON.parse(str); // 还原
  } else {
    for (let i in obj) {
      newObj[i] = typeof obj[i] === 'object' ? this.cloneObj(obj[i]) : obj[i];
    }
  }
  return newObj;
}

/**
 * @function deepCopy 浅深拷贝
 * @param  {type} obj {description}
 * @return {type} {description}
 */
export function deepCopy(obj) {
  return JSON.parse(JSON.stringify(obj));
}
/**
 * 设置本地localStorage
 * @name {String} 数据对象的KEY
 * @data {all} 对应key的数据
 */
export function setStorage(name, data) {
  let storage = window.localStorage;
  storage.setItem(name, JSON.stringify(data));
}

/**
 * 拿到本地localStorage
 * @name {String} 数据对象的KEY
 */
export function getStorage(name) {
  let storage = window.localStorage;
  let data = JSON.parse(storage.getItem(name));
  return data;
}
/**
 * 设置本地sessionStorage
 * @name {String} 数据对象的KEY
 * @data {all} 对应key的数据
 */
export function setSessionStorage(name, data) {
  let storage = window.sessionStorage;
  storage.setItem(name, JSON.stringify(data));
}

/**
 * 拿到本地sessionStorage
 * @name {String} 数据对象的KEY
 */
export function getSessionStorage(name) {
  let storage = window.sessionStorage;
  let data = JSON.parse(storage.getItem(name));
  return data;
}
/**
 * 取出对象中制定属性返回新对象
 * @obj {Object} 数据对象的KEY
 * @keys {Array} 数据对象的KEY
 */
export function certainProperty(obj, keys) {
  return keys.reduce((result, key) => {
    if (obj.hasOwnProperty(key)) {
      result[key] = obj[key];
    }
    return result;
  }, {});
}
  /*递归 根据子元素找到父级元素 */
export function getParent(data2, nodeId2) {
var arrRes = [];
if (data2.length == 0) {
if (nodeId2) {
  arrRes.unshift(data2);
}
return arrRes;
}
let rev = (data, nodeId) => {
for (var i = 0, length = data.length; i < length; i++) {
let node = data[i];
if (node.id == nodeId) {
  arrRes.unshift(node);
  rev(data2, node.pid);
  break;
} else {
  if (node.child) {
    rev(node.child, nodeId);
    }
    }
    }
    return arrRes;
    };
    arrRes = rev(data2, nodeId2);
    return arrRes;
  }

  

7.切记在vue的main.js或在最外层的index.js中,需要引入其中的一些js文件,现贴出main.js中的代码,提供参考。

 

/** @format */
import 'babel-polyfill';
import 'element-ui/lib/theme-chalk/index.css';
import '@/assets/styles/reset.less';
import '@/assets/styles/common.less';
import '@/assets/styles/theme-reset.less';

import Vue from 'vue';
import App from './App';

import ElementUI from 'element-ui';
Vue.use(ElementUI);

/* 导入视频插件 */
import VideoPlayer from 'vue-video-player';
Vue.use(VideoPlayer);
// 导入插件
import plugin from '@/plugins';
import router from '@/router';
import store from '@/store';

/* 导入公用方法 */
import '@/utils/prototypes';
import '@/utils/filters';
import '@/utils/directives';

import VueJsonp from 'vue-jsonp';
Vue.use(VueJsonp);

Vue.config.productionTip = false;

Vue.use(plugin);

new Vue({
  el: '#app',
  store,
  router,
  components: { App },
  template: '<App/>'
});

 

总结:以上是在公司总结出的比较有用的工具类,希望能对大家有些帮助,谢谢!

posted @ 2019-10-30 11:29  ____chen  阅读(7858)  评论(0编辑  收藏  举报