Skip to content

Top level {@html ...} not working if component rendered to ShadowRoot #8038

Closed
@jhony1104

Description

@jhony1104

Describe the bug

If a Svelte component is rendered to a ShadowRoot, it is not possible to create a top level {@html ...} tag.

The element creation fails with:

DOMException: Failed to execute 'createElement' on 'Document': The tag name provided ('#document-fragment') is not a valid name.

It works if {@html ...} is wrapped by another element.

Reproduction

https://stackblitz.com/edit/vitejs-vite-wc4uwt?file=src/App.svelte

Logs

DOMException: Failed to execute 'createElement' on 'Document': The tag name provided ('#document-fragment') is not a valid name.
    at element (https://vitejs-vite-wc4uwt--5173.local-credentialless.webcontainer.io/node_modules/.vite/deps/chunk-BJ76AV5Z.js?v=921e7c36:333:19)
    at HtmlTag.m (https://vitejs-vite-wc4uwt--5173.local-credentialless.webcontainer.io/node_modules/.vite/deps/chunk-BJ76AV5Z.js?v=921e7c36:700:18)
    at Object.mount [as m] (https://vitejs-vite-wc4uwt--5173.local-credentialless.webcontainer.io/src/App.svelte?t=1668790976113:43:13)
    at mount_component (https://vitejs-vite-wc4uwt--5173.local-credentialless.webcontainer.io/node_modules/.vite/deps/chunk-BJ76AV5Z.js?v=921e7c36:1686:24)
    at init (https://vitejs-vite-wc4uwt--5173.local-credentialless.webcontainer.io/node_modules/.vite/deps/chunk-BJ76AV5Z.js?v=921e7c36:1765:5)
    at new App (https://vitejs-vite-wc4uwt--5173.local-credentialless.webcontainer.io/src/App.svelte?t=1668790976113:83:3)
    at createComponent (https://vitejs-vite-wc4uwt--5173.local-credentialless.webcontainer.io/node_modules/svelte-hmr/runtime/svelte-hooks.js?v=921e7c36:206:20)
    at targetCmp.$replace (https://vitejs-vite-wc4uwt--5173.local-credentialless.webcontainer.io/node_modules/svelte-hmr/runtime/svelte-hooks.js?v=921e7c36:269:15)
    at refreshComponent (https://vitejs-vite-wc4uwt--5173.local-credentialless.webcontainer.io/node_modules/svelte-hmr/runtime/proxy.js?v=921e7c36:171:15)
    at ProxyAdapterDom.rerender (https://vitejs-vite-wc4uwt--5173.local-credentialless.webcontainer.io/node_modules/svelte-hmr/runtime/proxy-adapter-dom.js?v=921e7c36:77:5)

System Info

System:
    OS: Linux 5.10 Debian GNU/Linux 11 (bullseye) 11 (bullseye)
    Container: Yes
    Shell: 5.1.4 - /bin/bash
  Binaries:
    Node: 16.18.1 - /usr/bin/node
    npm: 8.19.2 - /usr/bin/npm
  Browsers:
    Vivaldi: 5.5.2805.44 (blink/chromium based)
  npmPackages:
    svelte: ^3.52.0 => 3.53.1 
    vite: ^3.2.3 => 3.2.4

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions