A typesafe library for writing HTML in Python:
import fastertags as h
if __name__ == "__main__":
doc = h.html(
h.head(
h.title("An example document"),
),
h.body(
h.h1("Title"),
h.p(class_="css-class-name")("some paragraph"),
h.p("Some more paragraph"),
),
)
print(doc)
yields
<!DOCTYPE html><html><head><title>An example document</title></head><body><h1>Title</h1><p class="css-class-name">some paragraph</p><p>Some more paragraph</p></body></html>
Tags and Attributes are scraped from the WHATWG HTML Spec
at https://html.spec.whatwg.org/.
Version numbers reflect when the scraping was done,
the current version 0.2024.11 was taken in December 2024.
fastertags is a standalone building block for fasterhtml, which in turn uses HTMX. Most notably, fastertags
serializes event-handler on* attributes as hx-on:*, for example hx-on:click instead of onclick.
This can be changed by setting HTMLElement.EVENT_HANDLER_PREFIX:
doc = h.h1().on("click", "alert('clicked')")("Title")
print(doc)
# <h1 hx-on:click="alert('clicked')">Title</h1>
h.HTMLElement.EVENT_HANDLER_PREFIX= "on"
print(doc)
# <h1 onclick="alert('clicked')">Title</h1>
fastertags emulates the scoped attributes on <style> tags by wrapping its contents in @scope { ... }.
The h.style() function does feature the boolean attribute scoped that allows for True, False, or None.
The default is None, which means contents will be wrapped in @scope { ... } if the element is not serialized
as the child of a head element:
doc = h.html(
h.head(
h.style("not scoped"),
),
h.body(
h.style("scoped"),
),
)
print(doc)
yields
<!DOCTYPE html><html><head><style>not scoped</style></head><body><style>@scope {scoped}</style></body></html>