<script>
const updatepopup = (title, desc) => alert(title + '\n' + desc);
</script>
<h1>Test page</h1>
<a href="" onclick="updatepopup("this is a string with a ' in it", "this also is a string with a ' in it");">Click me</a>
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
<script>
const updatepopup = (title, desc) => alert(title + '\n' + desc);
</script>
<h1>Test page</h1>
<a href="" onclick="updatepopup("this is a string with a ' in it", "this also is a string with a ' in it");">Click me</a>