[docs] Fix link icons for file reference section titles

[Janpot]

Fix file reference doc:

preview of the fix.

The SectionTitle component is a step in the good direction, but it still requires a global setup in the consuming application. it needs the sprite present on the page:

<svg style={{ display: 'none' }} xmlns="http://www.w3.org/2000/svg">
  <symbol id="anchor-link-icon" viewBox="0 0 16 16">
    <path d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" />
  </symbol>
</svg>

Is there a good way to make this component fully self contained?

[alexfauquette]

I don't see how to manage that in the SectionTitle file and at the same time be sure we do not add the <svg> component multiple time in a single page.

The best I can think about is a

function LayoutIcons({ icons , children }) {
  const defaultisedIdons = { ...defaultIcons, ...icons }
  return (<>
    {children}
    {Object.entries(([iconId, icon]) => 
      <svg key={iconId} style={{ display: 'none' }} xmlns="http://www.w3.org/2000/svg">
        <symbol id={iconId} viewBox="0 0 16 16" />
        {icon}
      </svg>
   )}
  </>);
}

[Janpot]

We could create the sprite imperatively, but not convinced that would be more maintainable 🙂

function SectionTitle() {
  React.useEffect(() => {
    let sprite = document.getElementById('svg-sprite');
    if (!sprite) {
      sprite = document.createElement('svg');
      sprite.outerHTML = `<svg id="svg-sprite" style="display:none" xmlns="http://www.w3.org/2000/svg"></svg>`;
      document.appendChild(sprite);
    }
    let symbol = document.getElementById('section-title-symbol');
    if (!symbol) {
      symbol = document.createElement('symbol');
      symbol.outerHTML = `<symbol id="anchor-link-icon" viewBox="0 0 16 16"><path d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z" /></symbol>`;
      sprite.appendChild(symbol);
    }
  }, []);
  return <div>Render section title here</div>;
}