The value of the hidden attribute is incorrect #16750
Description
Describe the bug
Sometimes the value "until-found" for the hidden attribute is not correct.
Reproduction
OK
<svelte:element this={'div'} hidden="until-found">aaa</svelte:element>
<div hidden="until-found">aaa</div>
-> <div hidden="until-found">aaa</div>
NG
<div {...{ hidden: 'until-found' }}>aaa</div>
{@const hidden = 'until-found'}
<div {hidden}>aaa</div>
-> <div hidden>aaa</div>
Logs
System Info
System:
OS: macOS 15.6.1
CPU: (12) arm64 Apple M4 Pro
Memory: 644.67 MB / 48.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 22.16.0 - /usr/local/bin/node
npm: 11.4.1 - /usr/local/bin/npm
pnpm: 10.12.1 - /usr/local/bin/pnpm
Browsers:
Chrome: 139.0.7258.155
Safari: 18.6
npmPackages:
svelte: ^5.38.9 => 5.38.9Severity
annoyance