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Make highlighted entities clickable in visualization #490

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Make highlighted entities clickable in visualization #490

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1cf610b
Make highlighted entities clickable in visualization
UditDewan Jul 19, 2026
c923eb9
Merge branch 'main' into clickable-entity-highlights
UditDewan Jul 25, 2026
a25539a
Merge branch 'main' into clickable-entity-highlights
UditDewan Aug 2, 2026
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9 changes: 8 additions & 1 deletion langextract/visualization.py
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Original file line number Diff line number Diff line change
Expand Up @@ -75,7 +75,7 @@ def _is_jupyter() -> bool:

_VISUALIZATION_CSS = textwrap.dedent("""\
<style>
.lx-highlight { position: relative; border-radius:3px; padding:1px 2px;}
.lx-highlight { position: relative; border-radius:3px; padding:1px 2px; cursor: pointer;}
.lx-highlight .lx-tooltip {
visibility: hidden;
opacity: 0;
Expand Down Expand Up @@ -544,6 +544,13 @@ def _extraction_sort_key(extraction):
window.prevExtraction = prevExtraction;
window.jumpToExtraction = jumpToExtraction;

document.getElementById('textWindow').addEventListener('click', (event) => {{
const highlight = event.target.closest('.lx-highlight');
if (highlight && highlight.dataset.idx !== undefined) {{
jumpToExtraction(highlight.dataset.idx);
}}
}});

updateDisplay();
}})();
</script>""")
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22 changes: 22 additions & 0 deletions tests/visualization_test.py
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Expand Up @@ -138,6 +138,28 @@ def test_visualize_basic_document_renders_correctly(self):
for component in expected_components:
self.assertIn(component, actual_html)

@mock.patch.object(
visualization, "HTML", new=None
) # Ensures visualize returns str
def test_visualize_highlights_are_clickable(self):

doc = data.AnnotatedDocument(
text="Patient needs Aspirin.",
extractions=[
data.Extraction(
extraction_class="MEDICATION",
extraction_text="Aspirin",
char_interval=data.CharInterval(start_pos=14, end_pos=21),
)
],
)

actual_html = visualization.visualize(doc)

self.assertIn("cursor: pointer", actual_html)
self.assertIn("addEventListener('click'", actual_html)
self.assertIn("closest('.lx-highlight')", actual_html)

@mock.patch.object(
visualization, "HTML", new=None
) # Ensures visualize returns str
Expand Down
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