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  • 👋Atomico
  • 🚀Getting started with Atomico
  • ⚛️Getting started with Atomico for React users
  • 💡What can you do with Atomico?
    • You can create amazing webcomponents
    • You can create design systems
    • You can create websites
    • You can create mobile applications
    • You can create web applications
  • API
    • 🧬Props(Properties)
      • Value cycle as prop
      • Is it advisable to declare events using the props API?
    • 🧩VirtualDOM
      • Advanced
    • 🎣Hooks
      • useProp
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      • useRef
      • useHost
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      • useMemo and useCallback
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      • atomico/test-hooks
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  • Guides
    • 🤔Frequent questions
      • Is it advisable to declare events using the props API?
      • How to declare events for your component at the type level for TSX?
      • When and why to use shadowDom?
      • Can I use Atomico in browsers without ESM support?
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    • @atomico/hooks
      • useCurrentValue
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    • @atomico/store
      • Store
    • @atomico/storybook
    • @atomico/router
    • @atomico/vite
      • ⚙️Process CSS tag template blocks with PostCSS.
      • 🏗️Compile your code to be distributed optimally as a package.
      • 📕Use the JSX/TSX syntax of Atomico when using Storybook.
      • 🤖Automatically create customElements.define
      • ☑️Support for Vitest for Atomico.
      • 🧙‍♂️Server actions
    • @atomico/exports
      • 🚩CLI and Flags
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      • Example with @atomico/vite
    • @atomico/wrapper
    • 🚫Deprecated
      • @atomico/magic-form
        • MagicFormProvider | <magic-form-provider>
        • MagicForm | <magic-form>
        • MagicForm Hooks
        • MagicForm in React and Preact
        • MagicForm in Microfrontend
        • MagicForm Patterns
      • @atomico/design-tokens
        • @atomico/design-tokens api
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  1. Guides
  2. Frequent questions

Can I use Atomico in browsers without ESM support?

PreviousWhen and why to use shadowDom?NextComponent

Last updated 10 months ago

Was this helpful?

Yes, but Atomico doesn't only depend on ESM, it also depends on the following api's that you will have to cover with Polyfill or some bundle tool.

  1. ESM modules: -

  2. CustomElements: -

  3. ShadowRoot: -

  4. Map: -

  5. Symbol and Symbol.for: -

  6. append and prepend: -

  7. Declarative Shadow DOM: Only for using SSR with webcomponents that use shadowDOM.

Let's understand that today Atomico covers 94% of existing browsers without the need for polyfills or packers, the 6% not covered are usually browsers like ie11 or others.

If you depend on the uncovered segment of browsers you can use the following tools to support the apis necessary for Atomico to work.

to associate Map, Symbol, append and prepend.

to associate esm.

to associate customElements apis.

🤔
documentation
caniuse
documentation
caniuse
documentation
caniuse
documentation
caniuse
documentation
caniuse
documentation
caniuse
documentation
polyfill-fastly.io
https://github.com/Rich-Harris/shimport
https://github.com/ungap/custom-elements