日常总结

null表示一个空对象指针，所以给typeof传null会返回object

 checkActive(item) {
      // const arr = this.model.split(',')
      const index = [this.model].findIndex(code => {
        return code === item.courseRingCode
      })
      return index >= 0
    }

:class="{ active: checkActive(item) }"

样式

 ::v-deep .el-button.is-round {
/deep/

表格

 ul{ 
        width: 520px; 
        height: 312px; 
        margin: 50px auto; 
    }
    ul li{ 
        list-style: none; 
        width: 100px; 
        height: 100px; 
        float: left; 
        border: 1px solid #999; 
        margin: 0 0 -1px -1px;
    }  
     // margin-right: -1px;
      border-top: 1px solid #e0e0e0;
      border-right: 1px solid #e0e0e0;

      const h = this.$createElement
      let Profile = h(
        'p',
        {
          class: 'shedule-messagebox'
        },
        [
          h(
            'span',
            {
              class: 'shedule-messagebox-title'
            },
            `已选择${this.checkedSum}节课`
          ),
          h(
            'span',
            {
              class: 'shedule-messagebox-content'
            },
            '是否确认将已选课程创建成为在线直播课程?'
          ),
          h(
            'span',
            {
              class: 'shedule-messagebox-tips'
            },
            '( 创建成功的课程将显示已选标签，未创建成功的课程可再次创建 )'
          )
        ]
      )

render(h) {
  return h('div', {
   class: {
    btn: true,
    'btn-success': this.type === 'success',
    'btn-danger': this.type === 'danger',
    'btn-warning': this.type === 'warning'
   },
   domProps: {
    innerText: this.text
   },
   on: {
    click: this.handleClick
   }
  });
 },

imgs.*?png

. | 除了换行和回车之外的任意字符 |

* | *? | 匹配 0 个或多个 |

shift()+push()
unshift()+pop()添加到数组的**开头**

let arr = new Array(10)
arr.forEach((item,index)=>{
item[index] = new Array(10)})

tooltip样式修改

<style lang="less">
.tooltip {
  color: #fff;
  padding: 0;
  font-size: 0.26rem;
  opacity: 1;
  border-radius: 2px;
  vertical-align: -0.02rem;
}
//箭头颜色
.el-tooltip__popper[x-placement^='top'] .popper__arrow::after {
  border-top-color: #fff;
}
.el-tooltip__popper[x-placement^='top'] .popper__arrow {
  border-top-color: #fff;
}
//背景颜色
.my-tooltip {
  background: #fff !important;
  border: 1px solid #d9dce2 !important;
  box-shadow: 0px 0.08rem 0.2rem 0px rgba(0, 0, 0, 0.1) !important;
}
</style>

      MessageBox.confirm(message, {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'ask'
      })
        .then(msg => {
          console.log('gsy-------------')
          this.$emit('message', msg)
        })
        .catch(e => {
          debugger
          console.warn('ClosePopup', e)
        })