Build sandbox-proxy HTML for a Blob URL, injecting search params that Blob URLs cannot carry reliably.
JSON-escapes the search string (incl. < → \\u003c) so it cannot break out of the inline script tag.
<
\\u003c
Build sandbox-proxy HTML for a Blob URL, injecting search params that Blob URLs cannot carry reliably.
JSON-escapes the search string (incl.
<→\\u003c) so it cannot break out of the inline script tag.