element-plus/es/components/transfer/src/useComputedData.mjs

A Component Library for Vue 3

import { computed } from 'vue';

const useComputedData = (props) => {
  const propsKey = computed(() => props.props.key);
  const dataObj = computed(() => {
    return props.data.reduce((o, cur) => (o[cur[propsKey.value]] = cur) && o, {});
  });
  const sourceData = computed(() => {
    return props.data.filter((item) => !props.modelValue.includes(item[propsKey.value]));
  });
  const targetData = computed(() => {
    if (props.targetOrder === "original") {
      return props.data.filter((item) => props.modelValue.includes(item[propsKey.value]));
    } else {
      return props.modelValue.reduce((arr, cur) => {
        const val = dataObj.value[cur];
        if (val) {
          arr.push(val);
        }
        return arr;
      }, []);
    }
  });
  return {
    propsKey,
    sourceData,
    targetData
  };
};

export { useComputedData };
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