项目查询搜索框添加清空按钮

src/views/projectApply/projectApplication.vue

@@ -119,6 +119,7 @@
         <el-input
           v-model="input"
           placeholder="输入项目名称/负责人/老师"
+          clearable
         ></el-input>
         <el-button type="primary" class="btn" size="mini" @click="getData"
           >查询</el-button