django-charsleft-widget

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django-charsleft-widget is a custom widget that limits the number of characters that can be entered in a textarea field.

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Installation

pip install django-charsleft-widget

External dependencies

jQuery - this is not included in the package since it is expected that in most scenarios this would already be available.

Setup

Add charsleft_widget to INSTALLED_APPS:

INSTALLED_APPS += (
    'charsleft_widget',
)

and just include charsleft_widget templates

{% include "charsleft_widget/charsleft_widget_css.html" %} {# Before the closing head tag #}
{% include "charsleft_widget/charsleft_widget_js.html" %} {# Before the closing body tag #}

When deploying on production server, don’t forget to run:

python manage.py collectstatic

Usage

All you need now is to import ClearableInput class and override field’s widget, for example:

from django.forms.fields import CharField

from charsleft_widget import CharsLeftArea

class Form(forms.Form):

    field = CharField(max_length=128, widget=CharsLeftArea)

Please see example application. This application is used to manually test the functionalities of this package. This also serves as a good example.

You need Django 5.2 or above to run that.

License

django-charsleft-widget is released under the BSD license.

Changes

1.1.0 (2026-08-14)

Added Django 6.0 and 6.1 support, alongside existing Django 5.2 support (fixes #7).
Dropped Python < 3.10 support.
Fixed charsleft.js: a page without both jQuery and a django global crashed with ReferenceError: django is not defined; typing past maxlength right on an emoji or other astral character split its UTF-16 surrogate pair and corrupted the field; only keyup/change were handled, so paste-via-mouse and IME input didn’t update the count; dynamically-added widgets (formsets, ajax) were never wired up; and the charsleft helper leaked onto window.
Fixed USE_JINJA rendering: textarea.jinja lived under templates/, where Django’s Jinja2 backend (APP_DIRS scans each app’s jinja2/ directory) could never find it; moved it to charsleft_widget/jinja2/.
Removed charsleft_widget/fields.py, a pre-Django-1.7 maxlength shim superseded by Django core and unused since.
locale/ and jinja2/ assets weren’t declared in package-data and were silently missing from built wheels/sdists; added.
Increased test coverage to 100%; added tests for Media, a value already over maxlength, and the Jinja2 backend actually being used.
Reformatted code and templates, and fixed ruff lint findings.

1.0.0 (2021-11-30)

Added Django 3+ support.
Dropped Python 2.7 support.
Dropped Django 1.10 / 1.11 support.

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