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LibWeb: Implement Document.getElementById()

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This was pleasantly simple! We don't have an ElementWrapper yet, so it
just returns a NodeWrapper, but it still basically works. :^)
This commit is contained in:
Andreas Kling 2020-03-14 13:24:15 +01:00
parent 1c406294fc
commit b5a22fc408
Notes: sideshowbarker 2024-07-19 08:18:50 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/b5a22fc408a
3 changed files with 14 additions and 3 deletions
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5
Base/home/anon/www/dom.html
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@ -4,9 +4,8 @@
<body>
<div id="foo"></div>
<script>
alert(document.nodeName);
//var e = document.getElementById("foo");
//alert(e.nodeName);
var e = document.getElementById("foo");
alert(e.nodeName);
</script>
</body>
</html>

10
Libraries/LibWeb/Bindings/DocumentWrapper.cpp
View file

@ -2,6 +2,7 @@
#include <LibJS/Value.h>
#include <LibWeb/Bindings/DocumentWrapper.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/DOM/Element.h>
namespace Web {
namespace Bindings {
@ -9,6 +10,15 @@ namespace Bindings {
DocumentWrapper::DocumentWrapper(Document& document)
: NodeWrapper(document)
{
put_native_function("getElementById", [this](JS::Interpreter&, Vector<JS::Value> arguments) -> JS::Value {
if (arguments.is_empty())
return JS::js_null();
auto id = arguments[0].to_string();
auto* element = node().get_element_by_id(id);
if (!element)
return JS::js_null();
return wrap(heap(), const_cast<Element&>(*element));
});
}
DocumentWrapper::~DocumentWrapper()

2
Libraries/LibWeb/DOM/Node.h
View file

@ -58,6 +58,8 @@ class Node
: public TreeNode<Node>
, public Bindings::Wrappable {
public:
using WrapperType = Bindings::NodeWrapper;
virtual ~Node();
NodeType type() const { return m_type; }