Support xlinkHref attribute for SVG image elements

[Copilot]

SVG <image> elements only recognized href as the image source attribute, causing errors when using the JSX/React-compatible xlinkHref prop.

// This worked
<svg><image href="data:image/..." /></svg>

// This threw "Image source is not provided"
<svg><image xlinkHref="data:image/..." /></svg>

Changes

src/handler/preprocess.ts

• Line 125: Check both href and xlinkHref when resolving image data from cache
• Lines 159-166: Collect image sources from both props.href and props.xlinkHref during preprocessing

test/image.test.tsx

• Added test case with xlinkHref attribute including xmlns:xlink namespace declaration

The existing ATTRIBUTE_MAPPING already handles the xlinkHref → xlink:href conversion for SVG output.

Original prompt

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This section details on the original issue you should resolve

<issue_title>xlinkHref isn't interpreted as source for <image /> in SVGs</issue_title>
<issue_description># Bug report

Description / Observed Behavior

Using namespaced attribute in JSX form like xlinkHref instead of xlink:href causes error "Image source is not provided" to be thrown.

Expected Behavior

Satori should use the JSX/TSX attribute xlinkHref as the <image /> source, interpreting it the same it does xlink:href and href.

Reproduction

Using xlink:href (works)

[Using xlinkHref (doesn't work)](https://og-playground.vercel.app/?share=5Vlpb-LIFv0riNGT-sk98YI3Mt0jGTCLbQx4w0aRRt6wDd5XoNX__ZUJJCQ9ip70kg9vYilR1anruvcc36q62D-6duK43fvuNyeoH-JOpyiPofv9x4-23en4buD55X3noYsiyL8eul8f4SZwSv8X1AmKNDSPLb4N3cMT3nZGQe7aZZDE7aidhFUUP42bYeDFs9KNivOgG5du_jS4q4oy2B6HCUDjcySvDLZgRA5O7n2HQLEbbH0JnUSQC1q6h5Jpff0yy8-fD_GfbeNbUXs3FL8_dHsI8tC9FeMlVgduM0gOAEQ6SAcMtH_XwW0QhmAkTmL3Ch2iMC4A5pdleg_DTdPcNb27JPdgDEEQuHV_a6mHQbz_W3O03-_Dh3b48YZz-IBAK_PL4F_FfY2q8YMShNWBb-98bALnwADtE3cY1b_G0-kcAYjjdz2KxJ7BqyuaesaeHN6C-XlO9I54hsrcjIttkkdgJE9Ks3S_4ETn4rdzcfXvZ_tL5FUefvktNUvw_GLkLxz7CyV7N1ZFmSd7F9hZoWlf1HnGf3_S5jry_y0A-oECYAR1h5L4SwFQBIA32Dvz7yOdi9vOo6e36WMfSp-8I_Anuwv910nxzvzRHgEEODu-JsLbCvQ-dAX07qjXK-CXrHhnBX5HaQRQP3u-5sLbEuAfKQFC3L1eAr8kxrsrAJLg0fE1F94WgPhAAXDwIAj8VQ78khjvrQDYBi6Or6nwtgLkRyrwest_3AZf5sV7CwDOgYvfSya8zZ_60CXwcsc_H4Ovs-J_4f83fOh35OO42-LSBr2Lg2u_0wkccNercuJ59k7nMnSpQNU4KNsCLrF2QKZBUsVOEHugBLy95RoLegs-qXGDPoUFAqsKt3Mu6Ka5uwVmvwWR6bnPEb1Ik8I2Q_cLcoeg5wvI9MQXTAVfYv4vWV9riM_F-lo6fC7W13Lhc7G-Vgifi_W1LPhcrK-lwOdifS0APhfra5nwj2N9nusV51fz_xp-_-nN04v4X8Jp7hZuXrtMkQJBJBO8lAM2t--o2uuWmGOW5v3ZOZzG3h-WWbgk_jXQBgupQfiJlzDgEmXVZ1UPtMZtf2AOGaPF8Yxlh21jqA9ma30OWoUC_glswzJR2pyNGF2UJWTG5AVuk6sWkOKVig7AXYddU9PGSgXYKpRVaaBNvQG1OVlyIA7Y2SbHCzlBdHVcSzON3fQZmonVITxFMiZ13eEYp5oS5_QAPzFJdChW9oaqJhx7ILNoPTIxpAf1aG--wQIasnsOi6KKVKEYhLHCvDHETSm6xI4nFGFsKw2GVnCPdHulIDkWn2rJJjIiESVzVPa5Q9k_mlHGE9U2tqmJKCVzMlZBbzo-7FVB0YdDj0kOa2Zv5Iy50IJFjroBvrFzwZsS5TDZjCBsKlM9GR7PY2sI7U9TTphA5gzPQjVfkIs4NTeZE9vIuKYgmOiTqi8jhbCQguUJhzJRywjbINAab5bD7dKy5-Z6VoqlloXISNqRGjOUgmKQEGsGUVM2jVZqfsr285wzhFm6WauJp_M...

• Fixes xlinkHref isn't interpreted as source for <image /> in SVGs #722

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Project	Deployment	Actions	Updated (UTC)
satori-playground	Ready	Preview, Comment, Open in v0	Feb 7, 2026 1:42pm