代码

<div v-for="(item, index) in queryParams.changeParams" :key="index"><el-form-item prop="dataConditionSearch"><el-dropdown @command="handleCommand" style="margin-right: 3px;"><span class="el-dropdown-link" style="cursor: pointer;">{{queryParams.changeParams[index].dataCondition}}<i class="el-icon-arrow-down el-icon--right"></i></span><el-dropdown-menu slot="dropdown"><el-dropdown-item :command="beforeHandleCommand('大于', index)">大于</el-dropdown-item><el-dropdown-item :command="beforeHandleCommand('小于', index)">小于</el-dropdown-item><el-dropdown-item :command="beforeHandleCommand('等于', index)">等于</el-dropdown-item></el-dropdown-menu></el-dropdown><el-input v-model="queryParams.changeParams[index].dataConditionSearch" placeholder="请输入" clearable style="width: 130px;" /></el-form-item><el-form-item label-width="10px"><i class="el-icon-remove-outline" style="cursor: pointer;" @click.prevent="deleteChangeParams(item)" /></el-form-item></div>

使用:command

    beforeHandleCommand(command, index) {return {'command': command,'index': index}},handleCommand(command) {let condition = command.command;let index = command.index;this.queryParams.changeParams[index].dataCondition = condition;},