Flask-WTF-Polyglot

Flask-WTF companion library providing PolyglotForm for polyglot HTML output.

Polyglot markup is a set of rules for how to write HTML. A document that uses polyglot markup is both a valid HTML5 document as well as a well-formed XML document, that can be served with either a text/html or an application/xhtml+xml MIME type.

This package provides the PolyglotForm class, which is built on top of Flask-WTF’s default Form. When using PolyglotForm, fields will be rendered with polyglot markup. For example, given the following form:

from flask_wtf_polyglot import PolyglotForm
from wtforms import BooleanField

class MyForm(PolyglotForm):
    foo = BooleanField("foo", default=True)

Rendering MyForm.foo will result in the following XML-compliant output:

<input checked="checked" id="foo" name="foo" type="checkbox" value="y" />

In contrast, using Flask-WTF’s default Form, the output would be:

<input checked id="foo" name="foo" type="checkbox" value="y">

In addition, this package exports WTForms-Polyglot_’s custom implementation of WTForms’ SubmitField, which renders as a <button> instead of an <input> element. For example:

from flask_wtf_polyglot import PolyglotForm, SubmitField

class MyForm(PolyglotForm):
    foo = SubmitField('Bar')

Produces this output:

<button id="foo" name="foo" type="submit" value="bar">bar</button>

Dependencies

Apart from Flask-WTF, this package relies upon WTForms-Polyglot to produce polyglot markup.