index.vue
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<template>
<el-select :size="size" v-model="model" :disabled="disabled" :remote="remote" :remote-method="remote ? remoteMethod : undefined" :placeholder="placeholder" clearable :filterable="filterable" :multiple="multiple" :value-key="format == 'text' ? undefined : valueKey" @change="handleChange" @focus="handleFocus" :loading="loading">
<el-option v-for="item in option" :key="format == 'text' ? item[valueProps.value] : item[valueKey]" :label="item[valueProps.label]" :value="format == 'text' ? item[valueProps.value] : item"></el-option>
</el-select>
</template>
<script>
export default {
name: 'Select',
props: {
// 组件值
value: [Object, String, Number, Boolean, Array],
// 选择框禁用状态
disabled: {
type: Boolean,
default: false
},
// 选择框提示
placeholder: {
type: String,
default: '请选择'
},
// 选择框大小
size: String,
// 是否可搜索
filterable: {
type: Boolean,
default: false
},
// 远程搜索
remote: {
type: Boolean,
default: false,
},
// 数据源
dataSource: {
type: [Promise, Function, Array],
required: true,
},
// 数据唯一标识
valueKey: {
type: String,
default: 'value'
},
// 数据格式
valueProps: {
type: Object,
default: () => {
return { value: 'value', label: 'label' };
}
},
// 格式化值类型 text object
format: {
type: String,
default: 'text'
},
// 是否每次打开下拉框刷新数据
uptodate: {
type: Boolean,
default: false
},
// 是否动态数据源
dynamicSource: {
type: Boolean,
default: false
},
// 是否为多选
multiple: {
type: Boolean,
default: false
},
},
data () {
return {
// 绑定值(由于选择框直接绑定model后Vue会报错，因此不使用value直接绑定而使用model代替)
model: this.multiple ? [] : undefined,
// 下拉框数据
option: [],
// 加载状态
loading: false,
};
},
watch: {
value(val) {
if (this.multiple && !val) {
this.model = [];
} else {
this.model = val;
if (this.remote) {
if (this.format === 'text') {
this.remoteMethod(val, this.valueProps.value);
} else {
this.remoteMethod(val ? val[this.valueProps.label] : val);
}
}
}
},
dataSource(val) {
if (this.dynamicSource) {
if (this.remote) {
if (this.format === 'text') {
this.remoteMethod(this.value, this.valueProps.value);
} else {
this.remoteMethod((this.value || {})[this.valueProps.label]);
}
} else {
this.queryData();
}
}
}
},
mounted() {
this.model = !this.multiple ? this.value : this.value || [];
if (this.remote) {
if (this.format === 'text') {
this.remoteMethod(this.value, this.valueProps.value);
} else {
this.remoteMethod((this.value || {})[this.valueProps.label]);
}
} else {
this.queryData();
}
},
methods: {
// 查询数据
async queryData() {
this.loading = true;
if (this.dataSource instanceof Array) {
this.option = this.dataSource;
} else {
this.option = await this.dataSource();
}
this.loading = false;
},
// 远程数据方法
async remoteMethod(query, value) {
this.loading = true;
const { label = 'name' } = this.valueProps || {};
this.option = await this.dataSource({ [value || label]: query });
this.loading = false;
},
// 聚焦选择框
handleFocus() {
if (this.remote) {
if (this.format === 'text') {
this.remoteMethod(this.value, this.valueProps.value);
} else {
this.remoteMethod((this.value || {})[this.valueProps.label]);
}
} else {
if (this.uptodate || this.dataSource instanceof Array) {
this.queryData();
}
}
},
// 选择
handleChange(value) {
this.model = this.value;
this.$emit('input', value);
this.$emit('change', value);
},
}
};
</script>