实现

button的icon属性自定义一个图标名称，这个自定义的图标名称会默认添加到button下i标签的class上，我们只需要设置i标签的样式就可以了

##3. 按钮上使用自定义的icon

完整代码

  <div class="lookBtn"><el-button icon="el-icon-my-message" size="mini" type="primary" @click="checkAllTask">查看任务</el-button></div>

样式代码

    ::v-deep .el-icon-my-message {background: url('../../assets/images/lookMsg.png') center no-repeat;width: 21px;height: 26px;}::v-deep .el-icon-my-message:before {content: "替";font-size: 20px;visibility: hidden;}::v-deep .el-icon-my-message {font-size: 16px;}::v-deep .el-icon-my-message:before {content: "\e611";}