ant-design-vue/components/vc-select2/hooks/useCacheDisplayValue.ts

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2020-10-07 14:49:01 +00:00
import { computed, ComputedRef, Ref } from 'vue';
import { DisplayLabelValueType } from '../interface/generator';
export default function useCacheDisplayValue(
values: Ref<DisplayLabelValueType[]>,
): ComputedRef<DisplayLabelValueType[]> {
let prevValues = [...values.value];
const mergedValues = computed(() => {
// Create value - label map
const valueLabels = new Map();
prevValues.forEach(({ value, label }) => {
if (value !== label) {
valueLabels.set(value, label);
}
});
const resultValues = values.value.map(item => {
const cacheLabel = valueLabels.get(item.value);
if (item.value === item.label && cacheLabel) {
return {
...item,
label: cacheLabel,
};
}
return item;
});
prevValues = resultValues;
return resultValues;
});
return mergedValues;
}