A social share row that renders only the networks you provide and appends UniSignIn campaign parameters to each outbound share URL.

The Share widget renders a row of icon buttons for the social networks whose URLs are passed into the container.
The current implementation supports Facebook, Twitter, LinkedIn, WhatsApp, and Flipboard. Each rendered URL is passed through `addParam` so UniSignIn share traffic can be tagged with `utm_source=unisignin&utm_campaign=share`.
A `darkMode` option changes the border and icon styling so the same widget can sit on light or dark article headers without custom CSS forks.
The share widget is rendered on `data-exp="unis-share"` containers. It relies on SyncCMS being enabled in `window.UNISIGNIN_CONFIG`, and it reads the social URLs directly from the container dataset.
<div
data-exp="unis-share"
data-dark-mode="dark"
data-facebook="https://www.facebook.com/sharer/sharer.php?u=..."
data-twitter="https://twitter.com/share?url=..."
data-linkedin="https://www.linkedin.com/shareArticle?mini=true&url=..."
data-whatsapp="whatsapp://send/?text=..."
data-flipboard="https://share.flipboard.com/bookmarklet/popout?v=2&url=..."
></div>

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