应用效果：从第一行输入1，按回车，聚焦到第二行输入2，按回车，聚焦到第三行……

一、通过元素 id，聚焦到下一行的输入框

关键技术点：

1、动态设置元素 id 属性为：:id="`input-apply-amount-${(option as IReagentOption).id}`"

2、设置回车监听：@keyup.enter.native="onEnterPressDown((option as IReagentOption).id)"

                <el-input......:id="`input-apply-amount-${(option as IReagentOption).id}`"@keyup.enter.native="onEnterPressDown((option as IReagentOption).id)" />

3、通过 document.getElementById 获取到指定元素

4、focus 和 select，聚焦、全选

// 通过元素 id，聚焦到下一行的输入框
const focusNextRowByElementId = (objId: number) => {// 通过 objId 获取当前行索引let currentRowIndex = selectedOptionIds.value.indexOf(objId);// 下一行的输入框let nextInput: HTMLInputElement;if (currentRowIndex + 1 < selectedOptionIds.value.length) {// 下一行索引的 objIdlet nextRowObjId = selectedOptionIds.value[currentRowIndex + 1];nextInput = document.getElementById(`input-apply-amount-${nextRowObjId}`) as HTMLInputElement;} else {// 最后一行聚焦到申领用途输入框nextInput = document.getElementById("transfer-right-footer-purpose-input") as HTMLInputElement;}nextInput?.focus();nextInput?.select();
};

二、通过元素 ref，聚焦到下一行的输入框

关键技术点：

1、动态设置元素 ref 属性为：:ref="`input-apply-amount-${(option as IReagentOption).id}`"

2、设置回车监听：@keyup.enter.native="onEnterPressDown((option as IReagentOption).id)"

                <el-input......:ref="`input-apply-amount-${(option as IReagentOption).id}`"@keyup.enter.native="onEnterPressDown((option as IReagentOption).id)" />

3、通过 getCurrentInstance() 获取当前组件实例，再通过 refs 获取到元素列表

4、focus 和 select，聚焦、全选

<script setup lang="ts" name="ReagentApplyDialog">
......
import { getCurrentInstance } from "vue";// 当前组件实例，相当 vue2 的this
const thisInstance = getCurrentInstance();// 通过元素 ref，聚焦到下一行的输入框
const focusNextRowByElementRef = (objId: number) => {if (!thisInstance) return;// 获取输入框实例 Recordlet refs = thisInstance.refs as Record<string, HTMLInputElement>;// 通过 objId 获取当前行索引let currentRowIndex = selectedOptionIds.value.indexOf(objId);if (currentRowIndex + 1 < selectedOptionIds.value.length) {// 下一行索引的 objIdlet nextRowObjId = selectedOptionIds.value[currentRowIndex + 1];// 聚焦到下一行的输入框refs[`input-apply-amount-${nextRowObjId}`].focus();refs[`input-apply-amount-${nextRowObjId}`].select();} else {// 最后一行聚焦到申领用途输入框refs["transfer-right-footer-purpose-input"].focus();refs["transfer-right-footer-purpose-input"].select();}
};
......
</script>

实例完整代码：

<script setup lang="ts" name="ReagentApplyDialog">
......
import { getCurrentInstance, nextTick, onMounted, ref, watch } from "vue";// 当前组件实例，相当 vue2 的this
const thisInstance = getCurrentInstance();// 按回车，申领数量输入框按回车
const onEnterPressDown = (objId: number) => {// 奇数if (objId % 2 === 1) {// 通过元素 id，聚焦到下一行的输入框focusNextRowByElementId(objId);}// 偶数else {// 通过元素 ref，聚焦到下一行的输入框focusNextRowByElementRef(objId);}
};// 通过元素 id，聚焦到下一行的输入框
const focusNextRowByElementId = (objId: number) => {// 通过 objId 获取当前行索引let currentRowIndex = selectedOptionIds.value.indexOf(objId);// 下一行的输入框let nextInput: HTMLInputElement;if (currentRowIndex + 1 < selectedOptionIds.value.length) {// 下一行索引的 objIdlet nextRowObjId = selectedOptionIds.value[currentRowIndex + 1];nextInput = document.getElementById(`input-apply-amount-${nextRowObjId}`) as HTMLInputElement;} else {// 最后一行聚焦到申领用途输入框nextInput = document.getElementById("transfer-right-footer-purpose-input") as HTMLInputElement;}nextInput?.focus();nextInput?.select();
};// 通过元素 ref，聚焦到下一行的输入框
const focusNextRowByElementRef = (objId: number) => {if (!thisInstance) return;// 获取输入框实例 Recordlet refs = thisInstance.refs as Record<string, HTMLInputElement>;// 通过 objId 获取当前行索引let currentRowIndex = selectedOptionIds.value.indexOf(objId);if (currentRowIndex + 1 < selectedOptionIds.value.length) {// 下一行索引的 objIdlet nextRowObjId = selectedOptionIds.value[currentRowIndex + 1];// 聚焦到下一行的输入框refs[`input-apply-amount-${nextRowObjId}`].focus();refs[`input-apply-amount-${nextRowObjId}`].select();} else {// 最后一行聚焦到申领用途输入框refs["transfer-right-footer-purpose-input"].focus();refs["transfer-right-footer-purpose-input"].select();}
};
......
</script><template>
......<el-transfer......><!-- 自定义列表数据项的内容 --><template #default="{ option }">......<el-inputv-if="selectedOptionIds.includes((option as IReagentOption).id)":ref="`input-apply-amount-${(option as IReagentOption).id}`":id="`input-apply-amount-${(option as IReagentOption).id}`"class="input-apply-amount"style="width: 85px; text-align: center"v-model="(option as IReagentOption).applyAmount"placeholder="输入申领数量"size="small"clearable@input="(option as IReagentOption).applyAmount = Number(formatToNumber($event, 0))"@keyup.enter.native="onEnterPressDown((option as IReagentOption).id)" />......</template></el-transfer>
......
</template>