BitrixVue 3

BitrixVue 3 wraps Vue 3 for use inside Bitrix (ui module 22.100+). Vue 2 is deprecated.

Features:

• Same Vue 3 API with Bitrix integrations (loc, events, REST).
• Single shared Vue version across product — no window.Vue pollution.
• Not suitable for SSR or SFC .vue files requiring server compilation.

Loading

In extension (preferred)

import { BitrixVue } from 'ui.vue3.bitrixvue';
import { Loc } from 'main.core';

BitrixVue.createApp({
    data() {
        return { items: [] };
    },
    mounted() {
        this.loadItems();
    },
    methods: {
        loadItems() {
            BX.ajax.runAction('vendor:module.item.list').then((r) => {
                this.items = r.data.items;
            });
        },
    },
    template: '<div><div v-for="item in items" :key="item.id">{{ item.name }}</div></div>',
}).mount('#app');

• Import BitrixVue from ui.vue3.bitrixvue (not bare ui.vue3).
• Import Vue primitives (ref, computed, h, …) from ui.vue3 when needed.
• Put ui.vue3 / ui.vue3.bitrixvue in config.php rel.

On PHP page (legacy)

\Bitrix\Main\UI\Extension::load('ui.vue3');

<div id="app"></div>
<script>
    BX.BitrixVue.createApp({ /* ... */ }).mount('#app');
</script>

Localization

import { Loc } from 'main.core';
import { BitrixVue } from 'ui.vue3.bitrixvue';

// Messages from lang files loaded via Extension
Loc.getMessage('VENDOR_MODULE_ITEM_TITLE');

// Filter phrases by prefix (BitrixVue helper):
BitrixVue.getFilteredPhrases(vueInstance, phrasePrefix, phrases);
// signature: (vueInstance, phrasePrefix, phrases?) — phrases optional (defaults to instance messages)

Register messages in extension lang/ and load via Extension::load. Do not import Loc from ui.vue3.

REST Integration

BX.rest.callMethod('vendor.module.item.get', { id: 1 }).then((result) => {
    this.item = result.data();
});

TypeScript

IDE definitions: bitrix/modules/ui/install/js/ui/vue3/ui.vue3.d.ts — add as external library if not auto-detected.

Migration from BitrixVue 2

• Replace Vue.create / BitrixVue.create with BitrixVue.createApp.
• Update lifecycle hooks (destroyed → unmounted).
• Remove Vue 2-specific filters and $on/$off on instances.
• See official migration guide on dev.1c-bitrix.ru.

Checklist

• BitrixVue 3 only — no Vue 2.
• BitrixVue from ui.vue3.bitrixvue; Vue APIs from ui.vue3; Loc from main.core.
• Code in /local/js/ extension, not inline in templates when possible.
• ui.vue3 / ui.vue3.bitrixvue in config.php rel dependencies.
• AJAX via BX.ajax.runAction or REST, not raw fetch without CSRF.
• Localization via Loc, not hardcoded strings.