update 优化 删除无用组件
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<template>
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<div class="el-tree-select">
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<el-select
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ref="treeSelect"
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v-model="valueId"
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style="width: 100%"
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:filterable="true"
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:clearable="true"
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:filter-method="selectFilterData as any"
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:placeholder="placeholder"
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@clear="clearHandle"
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>
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<el-option :value="valueId" :label="valueTitle">
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<el-tree
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id="tree-option"
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ref="selectTree"
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:accordion="accordion"
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:data="options"
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:props="objMap as any"
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:node-key="objMap.value"
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:expand-on-click-node="false"
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:default-expanded-keys="defaultExpandedKey"
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:filter-node-method="filterNode"
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@node-click="handleNodeClick"
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></el-tree>
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</el-option>
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</el-select>
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</div>
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</template>
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<script setup lang="ts">
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interface ObjMap {
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value: string;
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label: string;
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children: string;
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}
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interface Props {
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objMap: ObjMap;
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accordion: boolean;
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value: string | number;
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options: any[];
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placeholder: string;
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}
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const props = withDefaults(defineProps<Props>(), {
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objMap: () => {
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return {
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value: 'id',
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label: 'label',
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children: 'children'
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};
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},
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accordion: false,
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value: '',
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options: () => [],
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placeholder: ''
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});
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const selectTree = ref<ElTreeSelectInstance>();
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const emit = defineEmits(['update:value']);
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const valueId = computed({
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get: () => props.value,
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set: (val) => {
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emit('update:value', val);
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}
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});
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const valueTitle = ref('');
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const defaultExpandedKey = ref<any[]>([]);
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const initHandle = () => {
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nextTick(() => {
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const selectedValue = valueId.value;
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if (selectedValue !== null && typeof selectedValue !== 'undefined') {
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const node = selectTree.value?.getNode(selectedValue);
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if (node) {
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valueTitle.value = node.data[props.objMap.label];
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selectTree.value?.setCurrentKey(selectedValue); // 设置默认选中
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defaultExpandedKey.value = [selectedValue]; // 设置默认展开
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}
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} else {
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clearHandle();
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}
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});
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};
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const handleNodeClick = (node: any) => {
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valueTitle.value = node[props.objMap.label];
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valueId.value = node[props.objMap.value];
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defaultExpandedKey.value = [];
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selectTree.value?.blur();
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selectFilterData('');
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};
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const selectFilterData = (val: any) => {
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selectTree.value?.filter(val);
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};
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const filterNode = (value: any, data: any) => {
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if (!value) return true;
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return data[props.objMap['label']].indexOf(value) !== -1;
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};
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const clearHandle = () => {
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valueTitle.value = '';
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valueId.value = '';
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defaultExpandedKey.value = [];
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clearSelected();
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};
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const clearSelected = () => {
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const allNode = document.querySelectorAll('#tree-option .el-tree-node');
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allNode.forEach((element) => element.classList.remove('is-current'));
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};
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onMounted(() => {
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initHandle();
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});
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watch(valueId, () => {
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initHandle();
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});
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</script>
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<style lang="scss" scoped>
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@import '@/assets/styles/variables.module.scss';
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.el-scrollbar .el-scrollbar__view .el-select-dropdown__item {
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padding: 0;
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background-color: #fff;
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height: auto;
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}
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.el-select-dropdown__item.selected {
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font-weight: normal;
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}
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ul li .el-tree .el-tree-node__content {
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height: auto;
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padding: 0 20px;
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box-sizing: border-box;
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}
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:deep(.el-tree-node__content:hover),
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:deep(.el-tree-node__content:active),
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:deep(.is-current > div:first-child),
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:deep(.el-tree-node__content:focus) {
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background-color: mix(#fff, $--color-primary, 90%);
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color: $--color-primary;
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}
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</style>
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