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fix: treat empty custom_fonts array as intent to remove default fonts #2808

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fix: treat empty custom_fonts array as intent to remove default fonts #2808

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8 changes: 4 additions & 4 deletions backend/chainlit/server.py
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Original file line number Diff line number Diff line change
Expand Up @@ -410,10 +410,10 @@ def get_html_template(root_path):
js += f"""<script src="{config.ui.custom_js}" {config.ui.custom_js_attributes}></script>"""

font = None
if custom_theme and custom_theme.get("custom_fonts"):
if custom_theme and "custom_fonts" in custom_theme:
font = "\n".join(
f"""<link rel="stylesheet" href="{font}">"""
for font in custom_theme.get("custom_fonts")
f"""<link rel="stylesheet" href="{f}">"""
for f in custom_theme["custom_fonts"]
)

index_html_file_path = os.path.join(build_dir, "index.html")
Expand All @@ -425,7 +425,7 @@ def get_html_template(root_path):
content = content.replace(JS_PLACEHOLDER, js)
if css:
content = content.replace(CSS_PLACEHOLDER, css)
if font:
if font is not None:
content = replace_between_tags(
content, "<!-- FONT START -->", "<!-- FONT END -->", font
)
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