element-plus/es/components/message/src/instance.mjs

A Component Library for Vue 3

import { shallowReactive } from 'vue';

const placementInstances = shallowReactive(
  {}
);
const getOrCreatePlacementInstances = (placement) => {
  if (!placementInstances[placement]) {
    placementInstances[placement] = shallowReactive([]);
  }
  return placementInstances[placement];
};
const getInstance = (id, placement) => {
  const instances = placementInstances[placement] || [];
  const idx = instances.findIndex((instance) => instance.id === id);
  const current = instances[idx];
  let prev;
  if (idx > 0) {
    prev = instances[idx - 1];
  }
  return { current, prev };
};
const getLastOffset = (id, placement) => {
  const { prev } = getInstance(id, placement);
  if (!prev)
    return 0;
  return prev.vm.exposed.bottom.value;
};
const getOffsetOrSpace = (id, offset, placement) => {
  const instances = placementInstances[placement] || [];
  const idx = instances.findIndex((instance) => instance.id === id);
  return idx > 0 ? 16 : offset;
};

export { getInstance, getLastOffset, getOffsetOrSpace, getOrCreatePlacementInstances, placementInstances };
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