@coreui/vue/dist/esm/components/tabs/CTabPanel.js

UI Components Library for Vue.js

import { defineComponent, inject, ref, watch, h, Transition, withDirectives, vShow } from 'vue';
import { executeAfterTransition } from '../../utils/transition.js';

const CTabPanel = defineComponent({
    name: 'CTabPanel',
    props: {
        /**
         * Item key.
         */
        itemKey: {
            type: [Number, String],
            required: true,
        },
        /**
         * Enable fade in and fade out transition.
         */
        transition: {
            type: Boolean,
            default: true,
        },
        /**
         * Toggle the visibility of component.
         */
        visible: {
            type: Boolean,
            default: false,
        },
    },
    emits: [
        /**
         * Callback fired when the component requests to be hidden.
         */
        'hide',
        /**
         * Callback fired when the component requests to be shown.
         */
        'show',
    ],
    setup(props, { slots, emit }) {
        const activeItemKey = inject('activeItemKey');
        const id = inject('id');
        const tabPaneRef = ref();
        const firstRender = ref(true);
        const visible = ref();
        watch(() => props.visible, () => {
            visible.value = props.visible;
        }, {
            immediate: true,
        });
        watch(activeItemKey, () => {
            visible.value = Boolean(activeItemKey.value === props.itemKey);
        }, {
            immediate: true,
        });
        const handleEnter = (el, done) => {
            firstRender.value = false;
            emit('show');
            setTimeout(() => {
                executeAfterTransition(() => done(), el);
                el.classList.add('show');
            }, 1);
        };
        const handleLeave = (el, done) => {
            firstRender.value = false;
            emit('hide');
            el.classList.remove('show');
            executeAfterTransition(() => done(), el);
        };
        return () => h(Transition, {
            onEnter: (el, done) => handleEnter(el, done),
            onLeave: (el, done) => handleLeave(el, done),
        }, () => withDirectives(h('div', {
            class: [
                'tab-pane',
                {
                    active: visible.value,
                    fade: props.transition,
                    show: firstRender.value && visible.value,
                },
            ],
            id: `${props.itemKey}-tab-panel-${id}`,
            role: 'tabpanel',
            'aria-labelledby': `${props.itemKey}-tab-${id}`,
            tabindex: 0,
            ref: tabPaneRef,
        }, slots.default && slots.default()), [[vShow, visible.value]]));
    },
});

export { CTabPanel };
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