1、日期控件原来样式

现在我们需要在日期控件右下角添加按钮（如下方示例）

2、实现方式

<el-date-picker class="date-down" ref="datePick" align="right" v-model="comSearch.time"
type="daterange" :clearable="false" :picker-options="dateButton" range-separator="——" 
start-placeholder="开始日期"  end-placeholder="结束日期"  format="yyyy-MM-dd"
value-format="yyyy-MM-dd" @change="changeTime">
</el-date-picker>
<!--
align="right"  					默认与日期框左侧对齐，我这边给他设置的居右对齐
:clearable="false"      		默认在日期框上显示清空icon，false表示不显示
:picker-options="dateButton"	默认表示为日期选择框左侧的快捷日期选择，我这边为了方便添加清空、
								确定，直接在快捷设置里面添加
-->

data(){
	var that = this;
	return{
		// 日期清空 确定
      dateButton: {
      	time:'',
        shortcuts: [
          {
            text: "清空",
            onClick() {
              that.time = "";
            },
          },
          {
            text: "确定",
            onClick() {
              that.$refs.datePick.handleClose();
              //通过$ref设置 点击确定时，关闭日期选择的弹窗
            },
          },
        ],
      },
	}
},
methods(){
	// 当日期改变时触发
    changeTime(e) {
      //保证在选择完时间后，日期弹出框不会消失
      this.$refs.datePick.focus();
      this.time = e;
    },
}

/* 日期控件样式 */
/* input框placeholder样式 */
.el-date-editor input::-webkit-input-placeholder {
   color: #fff;
}
.el-date-editor input::-moz-input-placeholder {
   color: #fff;
}
.el-date-editor input::-ms-input-placeholder {
   color: #fff;
}
/* 日期选择框面板样式 */
.el-picker-panel,
.el-date-picke {
   width: 506px !important;
   height: 323px !important;
   background: rgba(0, 0, 0, 1) !important;
   border: 1px solid rgba(255, 255, 255, 0.3);
   margin: 0;
   font-size: 1rem !important;
   font-family: 'HelveticaNeue-Medium, HelveticaNeue';
   font-weight: 500;
   color: #FFFFFF;
}
.el-popper[x-placement^=bottom] {
   margin-top: 0px !important;
}

.el-popper[x-placement^=bottom] .popper__arrow::after {
   border-bottom-color: rgba(0, 0, 0, 0) !important;
}

.el-popper[x-placement^=bottom] .popper__arrow {
   border-bottom-color: rgba(0, 0, 0, 0) !important;
}

.el-date-range-picker .el-picker-panel__body {
   min-width: 506px;
}

/* 日期选择器左侧快捷方式样式重写 定位到底部 */
.el-picker-panel__sidebar {
   width: 506px;
   height: 40px;
   padding: 0;
   display: flex;
   justify-content: right;
   align-items: center;
   margin-top: 283px;
   background: rgba(0, 0, 0, 0) !important;
   border-right: 1px solid rgba(0, 0, 0, 0);
}

.el-picker-panel__sidebar :nth-child(2) {
   background-color: #3AA0B8;
   border: none;
}

.el-picker-panel__sidebar>button {
   width: 56px;
   height: 24px;
   line-height: 20px;
   margin-right: 16px;
   border: 1px solid #6DE3FF;
   font-size: 12px;
   font-family: 'PingFangSC-Regular, PingFang SC';
   font-weight: 400;
   color: #FFFFFF;
   padding: 0;
   text-align: center;
   border-radius: 2px;
}

.el-picker-panel__shortcut:hover {
   color: #fff;
   border: 1px solid #fff;
}
/* 日期选择器日历部分样式*/
.el-picker-panel__body-wrapper {
   width: 506px;
   height: 323px;
   display: flex;
   flex-wrap: wrap;
}

.el-picker-panel__body {
   margin: 0 !important;
   width: 506px;
   height: 283px;
}

.el-date-range-picker__header {
   box-sizing: border-box;
   padding: 0 10px;
   font-size: 0.16rem !important;
   font-family: 'HelveticaNeue-Medium, HelveticaNeue';
   font-weight: 500 !important;
   color: #FFFFFF !important;
}

.el-date-picker__header-label {
   font-size: 16px;
   font-weight: 500;
   padding: 0 5px;
   line-height: 22px;
   text-align: center;
   cursor: pointer;
   color: #fff;
}

.el-picker-panel__content {
   height: 283px;
   padding: 0px;
   border-bottom: 1px solid #e4e4e4;
   box-sizing: border-box !important;
}

.el-picker-panel__icon-btn {
   font-size: 12px;
   color: #fff;
   border: 0;
   background: 0 0;
   cursor: pointer;
   outline: 0;
   margin-top: 8px;
}

.el-date-table {
   box-sizing: border-box;
   padding: 5px;
}

.el-date-table th {
   padding: 5px;
   color: #fff;
   font-weight: 400;
   border-bottom: solid 1px rgba(255, 255, 255, 0.3);
}

.el-date-table td {
   padding: 2px 0px !important;
}

.el-date-table td.end-date span,
.el-date-table td.start-date span {
   background-color: #3AA0B8;
}
/* 选中范围背景色 */
.el-date-table td.in-range div,
.el-date-table td.in-range div:hover,
.el-date-table.is-week-mode .el-date-table__row.current div,
.el-date-table.is-week-mode .el-date-table__row:hover div {
   background-color: rgba(255, 255, 255, 0.2) !important;
}