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LibWeb: Prepare script when src is set the first time

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From https://html.spec.whatwg.org/multipage/scripting.html#script-processing-model:
When a script element el that is not parser-inserted experiences one
of the events listed in the following list, the user agent must
immediately prepare the script element el:
- [...]
- The script element is connected and has a src attribute set where
  previously the element had no such attribute.
This commit is contained in:
Maciej 2024-07-07 21:57:01 +02:00 committed by Tim Ledbetter
parent 98e1ae49f5
commit d890be6e0f
Notes: sideshowbarker 2024-07-17 11:30:54 +09:00 
Author: https://github.com/sppmacd
Commit: https://github.com/LadybirdBrowser/ladybird/commit/d890be6e0f
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/498
Issue: https://github.com/LadybirdBrowser/ladybird/issues/497
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/tcl3 ✅
5 changed files with 27 additions and 0 deletions
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1
Tests/LibWeb/Text/expected/script-src-set-after-insertion.txt Normal file
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@ -0,0 +1 @@
PASS

13
Tests/LibWeb/Text/input/script-src-set-after-insertion.html Normal file
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@ -0,0 +1,13 @@
<!DOCTYPE html>
<head></head>
<script src="include.js"></script>
<script>
asyncTest((done) => {
const el = document.createElement("script");
el.onload = () => {
done();
};
document.head.appendChild(el);
el.setAttribute("src", "script-src-set-after-insertion.js");
});
</script>

1
Tests/LibWeb/Text/input/script-src-set-after-insertion.js Normal file
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@ -0,0 +1 @@
println("PASS");

10
Userland/Libraries/LibWeb/HTML/HTMLScriptElement.cpp
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@ -58,6 +58,16 @@ void HTMLScriptElement::attribute_changed(FlyString const& name, Optional<String
m_crossorigin = cors_setting_attribute_from_keyword(value);
} else if (name == HTML::AttributeNames::referrerpolicy) {
m_referrer_policy = ReferrerPolicy::from_string(value.value_or(""_string)).value_or(ReferrerPolicy::ReferrerPolicy::EmptyString);
} else if (name == HTML::AttributeNames::src) {
bool old_src_is_set = m_src_is_set;
m_src_is_set = value.has_value();
// https://html.spec.whatwg.org/multipage/scripting.html#script-processing-model
// When a script element el that is not parser-inserted experiences one of the events listed in the following list, the user agent must immediately prepare the script element el:
// - [...]
// - The script element is connected and has a src attribute set where previously the element had no such attribute.
if (!is_parser_inserted() && is_connected() && !old_src_is_set && m_src_is_set) {
prepare_script();
}
}
}

2
Userland/Libraries/LibWeb/HTML/HTMLScriptElement.h
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@ -135,6 +135,8 @@ private:
Optional<DOM::DocumentLoadEventDelayer> m_document_load_event_delayer;
size_t m_source_line_number { 1 };
bool m_src_is_set = false;
};
}