留言板网站建设总结嵌入式培训机构

需要实现防抖应用场景：

点击【查询】按钮，发送网络请求，等待并接收响应数据

原来点击【查询】的代码：

<script setup lang="ts" name="ReagentTransactionsDrawer">
......
// 查询，没有防抖，可以重复点击
const onQueryClick = async () => {// 检查if (queryObj.value.transactionTime.length === 0 &&!queryObj.value.transactionType &&!queryObj.value.materialName) {ElMessage.warning("请输入查询条件！");return;}transactionsList.value = [];let result = await branchWarehouseTransactionsQueryForReagentService(queryObj.value);transactionsList.value = result.data;
};
......
</script><template>
......<el-button class="btn-same-width" type="primary" plain @click="onQueryClick">查询</el-button>
......
</template>

一、使用自定义的防止重复点击组合式函数 hook 

1、编写防止重复点击组合式函数 hook，usePreventReClick.ts

2、导入防止重复点击组合式函数 hook

3、使用 preventReClick 防止重复点击

<script setup lang="ts" name="ReagentTransactionsDrawer">
......
import { usePreventReClick } from "@/hooks/usePreventReClick";
const { preventReClick } = usePreventReClick();// 查询，加装 preventReClick 防抖器，防止重复点击
const onQueryClick = async () => {preventReClick(async () => { // 改动1：增加防抖代码// 检查if (queryObj.value.transactionTime.length === 0 &&!queryObj.value.transactionType &&!queryObj.value.materialName) {ElMessage.warning("请输入查询条件！");return;}transactionsList.value = [];let result = await branchWarehouseTransactionsQueryForReagentService(queryObj.value);transactionsList.value = result.data;}); // 改动2：增加防抖代码
};
......
</script><template>
......<el-button class="btn-same-width" type="primary" plain @click="onQueryClick">查询</el-button>
......
</template>

 防止重复点击组合式函数 hook，usePreventReClick.ts

import { ref } from "vue";type AsyncFunction = () => Promise<any>;/*** 防止重复点击 hook* @returns*/
export function usePreventReClick() {const isClicking = ref(false);const preventReClick = async (fn: AsyncFunction) => {if (isClicking.value) {return;}isClicking.value = true;try {await fn();} finally {isClicking.value = false;}};return {isClicking,preventReClick};
}

 二、使用lodash-es的debounce

1、安装 lodash-es 工具库

2、按需使用导入debounce

3、使用 debounce 防止重复点击

<script setup lang="ts" name="ReagentTransactionsDrawer">
......
import { debounce } from "lodash-es";// 查询，加装 debounce 防抖器，防抖处理（leading: true，立即执行、maxWait: 1000，1秒内至少执行一次）
const onQueryClick = debounce( // 改动1：const onQueryClick = async () => { 改为 const onQueryClick = debounce(async () => {// 检查if (queryObj.value.transactionTime.length === 0 &&!queryObj.value.transactionType &&!queryObj.value.materialName) {ElMessage.warning("请输入查询条件！");return;}transactionsList.value = [];let result = await branchWarehouseTransactionsQueryForReagentService(queryObj.value);transactionsList.value = result.data;}, // 改动2：} 改为 },1000, // 改动3：增加防抖代码{ leading: true, trailing: true, maxWait: 1000 } // 改动4：增加防抖代码
); // 改动5：增加防抖代码
......
</script><template>
......<el-button class="btn-same-width" type="primary" plain @click="onQueryClick">查询</el-button>
......
</template>

三、使用自定义防抖组件 

1、编写防止重复点击按钮组件（防抖按钮组件），BasePreventReClickButton.vue

2、导入防抖组件

3、在模板中使用组件

<script setup lang="ts" name="ReagentTransactionsDrawer">
......
import BasePreventReClickButton from "@/components/base/BasePreventReClickButton.vue";// 查询，使用 BasePreventReClickButton 防抖组件，防止重复点击
const onQueryClick = async () => {// 检查if (queryObj.value.transactionTime.length === 0 &&!queryObj.value.transactionType &&!queryObj.value.materialName) {ElMessage.warning("请输入查询条件！");return;}transactionsList.value = [];let result = await branchWarehouseTransactionsQueryForReagentService(queryObj.value);transactionsList.value = result.data;
};
......
</script><template>
......<BasePreventReClickButton class="btn-same-width" type="primary" plain @click="onQueryClick">查询</BasePreventReClickButton> <!-- 改动1：改用防抖组件 BasePreventReClickButton -->
......
</template>

防止重复点击按钮组件（防抖按钮组件），BasePreventReClickButton.vue

/** * 防止重复点击按钮组件（防抖按钮组件） */
<script setup lang="ts" name="BasePreventReClickButton">
import { ref } from "vue";const props = withDefaults(defineProps<{onClick: () => Promise<void> | void;delay?: number;}>(),{delay: 0}
);// 加载标识
const loading = ref(false);// 点击事件
const handleClick = async (): Promise<void> => {if (loading.value) return;loading.value = true;try {await props.onClick();} finally {let delay = props.delay;if (delay < 0) delay = 0;setTimeout(() => {loading.value = false;}, delay);}
};
</script><template><!-- v-bind="$attrs" 绑定父组件传递的所有属性 --><!-- 设置当前组件的个性属性，可以覆盖父组件属性 :loading="loading" :disabled="loading" @click="handleClick" --><el-button v-bind="$attrs" :loading="loading" :disabled="loading" @click="handleClick"><!-- 插槽 --><slot></slot></el-button>
</template><style scoped lang="scss"></style>