React Reveal.js with Code Surfer

This is an assortment of unstyled utility React components that allow you to easily use Code Surfer in reveal.js presentations, without the need to use mdx-deck

Installation

npm install react-revealjs-with-code-surfer

or

yarn add react-revealjs-with-code-surfer

Why?

I created this after I struggled using the amazing code-surfer package along with the equally amazing reveal.js for a presentation I was making. code-surfer is tightly coupled with mdx-deck by default, which makes it difficult to use with any other presentation library.

But if there is a will there is a way.

No mdx-deck!

API

Components

SurferCode

Provides you with a Code Surfer code panel, with keyboard controls and animations enabled. Must be used inside a RevealJSInstanceProvider. Should be used inside a SurferSlideIDProvider if you have many SurferCode code panels, but can be used without one if you only have one.

Props

• steps: InputStep[] : An array of input step elements. See below for info
• theme?: string : One of the available themes bundled with code-surfer. Autocomplete gives you all the options.
• nav?: {next: KeyboardEvent['code'], previous: KeyboardEvent['code']} : Define which keys you want to use to control the Code Surfer code panel. Default keys are [ and ] since reveal.js uses the arrows.

interface InputStep {
  code: string;
  /*
   * number -> line
   * numberA:numberB -> from line A to line B
   * numberA,numberB,numberC -> line A and line B and line C
   * [] -> columns
   * numberA[numberB] -> column B from line A
   * numberA[numberB:numberC] -> column B through column C from line A
   * numberA[numberB,numberC] -> column B and column C from line A
   * See https://github.com/pomber/code-surfer#focus
   */
  focus?: string;
  title?: ReactNode;
  subtitle?: ReactNode;
  lang?: string;
  showNumbers?: boolean;
}

---

SurferSlide

A utility component that provides a section slide with a slide ID. Must be used inside a SurferSlideIDProvider

Props

• children: ReactNode
• ...rest: HTMLProps<HTMLElement> : whatever HTML attribute you want to pass to the underlying section element. data-code-surfer values will be ignored

// example

<SurferSlideIDProvider>
  <SurferSlide className="will-be-passed-to-the-section-element">
    <div className="r-stretch text-left">
      <SurferCode steps={props.steps} />
    </div>
    <aside className={'notes'}>Some notes</aside>
  </SurferSlide>
</SurferSlideIDProvider>

---

SurferSlideIDProvider

A simple provider that creates a unique ID and passes it down to children. Necessary to use if you have many Code Surfer code panels, otherwise navigating in one will navigate every single one (if you are using the same navigation keys in every single one)

Props

• children: ReactNode
• id?: string : You may pass a predefined id if you know that it will be unique

---

RevealJSProvider

A provider that initializes a reveal.js instance and passes it down. Accepts a reveal.js options object, however viewdistance will be ignored since it must always be Infinity otherwise Code Surfer code panels in distant slides have sizing issues

Props

• children: ReactNode
• config?: Omit<RevealJS.Options, 'viewDistance'> : Default config is { plugins: [RevealNotes], hash: true, }
• exposeToWindow?: boolean : Chose to expose the reveal.js instance to the window object. Default is false.
• onInitialize?: (revealInstance: Reveal.Api) => void : Callback function you can pass that will be executed after reveal.js has initialized and after the reveal.js instance has been set as the current reveal.js instance internally in the provider state.

---

Hooks

useCodeSurferSlideID

A hook that if it's used inside the descendants of a SurferSlideIDProvider it returns the unique id that is needed to exist as a data-code-surfer attribute on the slide section in order to isolate code navigation to the currently visible Code Surfer code panel. Returns '' if it's used outside of a context provider.

useRevealJSInstance

A hook that if it's used inside the descendants of a RevealJSInstanceProvider it returns the unique currently initialized reveal.js instance. Returns null if it's used outside of a context provider or if the reveal.js instance has not completed initializing yet.

Notes

You will need to have reveal.js, react, react-dom and their types installed in your own project. This package only requires them as peer dependencies.