工作中最近用到树结构的下拉选择器,也是参考他人文档做了下简略封装,还是挺简略易用的。
<template>
<el-select
ref="mySelect"
v-bind="$attrs"
:multiple="false"
:disabled="disabled"
>
<el-option :value="optionValue" class="options">
<el-tree
id="tree-option"
ref="selectTree"
default-expand-all
:data="options"
@node-click="handleNodeClick"
/>
</el-option>
</el-select>
</template>
<script>
import {defineComponent, ref} from "vue";
export default defineComponent({
name: "mySelect",
props: {
disabled: {
type: Boolean,
default: false,
},
options: {
type: Array,
default: () => [
{
label: "选项 1",
value: "1",
children: [{label: "选项 1 -1", value: "1-1"}],
},
{label: "选项 2", value: "2"},
],
},
},
emits: ["nodeClick", "update:modelValue"],
setup(props, context) {const mySelect = ref();
const optionValue = ref("");
function handleNodeClick(node) {
optionValue.value = node.label;
mySelect.value.blur();
context.emit("nodeClick", node);
context.emit("update:modelValue", node.value);
}
return {
mySelect,
handleNodeClick,
optionValue,
};
},
});
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
.el-scrollbar .el-scrollbar__view .el-select-dropdown__item {
height: auto;
max-height: 274px;
padding: 0;
overflow: hidden;
overflow-y: auto;
}
.el-select-dropdown__item.selected {font-weight: normal;}
ul li >>> .el-tree .el-tree-node__content {
height: auto;
padding: 0 20px;
}
.el-tree-node__label {font-weight: normal;}
.el-tree >>> .is-current .el-tree-node__label {
color: #409eff;
font-weight: 700;
}
.el-tree >>> .is-current .el-tree-node__children .el-tree-node__label {
color: #606266;
font-weight: normal;
}
.selectInput {
padding: 0 5px;
box-sizing: border-box;
}
</style>
应用:
<template>
<div class="hello">
<selectTreeVue v-model="value" @treeSelect="handleSelect" />
</div>
</template>
<script>
import selectTreeVue from "./select-tree.vue";
import {defineComponent, ref} from "vue";
export default defineComponent({
name: "HelloWorld",
components: {selectTreeVue},
setup() {const value = ref("");
function handleSelect(data) {console.log(data);
}
return {
handleSelect,
value,
};
},
});
</script>
比较简单,不过不能应用多选,所以在组件外部屏蔽掉了 multiple 避免在内部应用该属性。