element-plus/es/el-collapse/index.js

A Component Library for Vue3.0

import { defineComponent, ref, watch, onUnmounted, provide, openBlock, createBlock, renderSlot } from 'vue';
import mitt from 'mitt';
import { UPDATE_MODEL_EVENT, CHANGE_EVENT } from '../utils/constants';

var script = defineComponent({
    name: 'ElCollapse',
    props: {
        accordion: Boolean,
        modelValue: {
            type: [Array, String, Number],
            default: () => [],
        },
    },
    emits: [UPDATE_MODEL_EVENT, CHANGE_EVENT],
    setup(props, { emit }) {
        const activeNames = ref([].concat(props.modelValue));
        const collapseMitt = mitt();
        const setActiveNames = _activeNames => {
            activeNames.value = [].concat(_activeNames);
            const value = props.accordion ? activeNames.value[0] : activeNames.value;
            emit(UPDATE_MODEL_EVENT, value);
            emit(CHANGE_EVENT, value);
        };
        const handleItemClick = name => {
            if (props.accordion) {
                setActiveNames((activeNames.value[0] || activeNames.value[0] === 0) &&
                    activeNames.value[0] === name
                    ? ''
                    : name);
            }
            else {
                let _activeNames = activeNames.value.slice(0);
                const index = _activeNames.indexOf(name);
                if (index > -1) {
                    _activeNames.splice(index, 1);
                }
                else {
                    _activeNames.push(name);
                }
                setActiveNames(_activeNames);
            }
        };
        watch(() => props.modelValue, () => {
            activeNames.value = [].concat(props.modelValue);
        });
        collapseMitt.on('item-click', handleItemClick);
        onUnmounted(() => {
            collapseMitt.all.clear();
        });
        provide('collapse', {
            activeNames,
            collapseMitt,
        });
        return {
            activeNames,
            setActiveNames,
            handleItemClick,
        };
    },
});

const _hoisted_1 = {
  class: "el-collapse",
  role: "tablist",
  "aria-multiselectable": "true"
};

function render(_ctx, _cache, $props, $setup, $data, $options) {
  return (openBlock(), createBlock("div", _hoisted_1, [
    renderSlot(_ctx.$slots, "default")
  ]))
}

script.render = render;
script.__file = "packages/collapse/src/collapse.vue";

script.install = (app) => {
    app.component(script.name, script);
};
const _Collapse = script;

export default _Collapse;