Settings

The django-bootstrap4 has some pre-configured settings.

They can be modified by adding a dict variable called BOOTSTRAP4 in your settings.py and customizing the values ​​you want;

The BOOTSTRAP4 dict variable contains these settings and defaults:

# Default settings
BOOTSTRAP4 = {

    # The complete URL to the Bootstrap CSS file
    # Note that a URL can be either a string,
    # e.g. "https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css",
    # or a dict like the default value below.
    "css_url": {
        "href": "https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/css/bootstrap.min.css",
        "integrity": "sha384-B0vP5xmATw1+K9KRQjQERJvTumQW0nPEzvF6L/Z6nronJ3oUOFUFpCjEUQouq2+l",
        "crossorigin": "anonymous",
    },

    # The complete URL to the Bootstrap bundle JavaScript file
    "javascript_url": {
        "url": "https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/js/bootstrap.bundle.min.js",
        "integrity": "sha384-Piv4xVNRyMGpqkS2by6br4gNJ7DXjqk09RmUpJ8jgGtD7zP9yug3goQfGII0yAns",
        "crossorigin": "anonymous",
    },

    # The complete URL to the Bootstrap CSS theme file (None means no theme)
    "theme_url": None,

    # The URL to the jQuery JavaScript file (full)
    "jquery_url": {
        "url": "https://code.jquery.com/jquery-3.5.1.min.js",
        "integrity": "sha384-ZvpUoO/+PpLXR1lu4jmpXWu80pZlYUAfxl5NsBMWOEPSjUn/6Z/hRTt8+pR6L4N2",
        "crossorigin": "anonymous",
    },

    # The URL to the jQuery JavaScript file (slim)
    "jquery_slim_url": {
        "url": "https://code.jquery.com/jquery-3.5.1.slim.min.js",
        "integrity": "sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj",
        "crossorigin": "anonymous",
    },

    # Put JavaScript in the HEAD section of the HTML document (only relevant if you use bootstrap4.html)
    'javascript_in_head': False,

    # Include jQuery with Bootstrap JavaScript False|falsy|slim|full (default=False)
    # False - means tag bootstrap_javascript use default value - `falsy` and does not include jQuery)
    'include_jquery': False,

    # Label class to use in horizontal forms
    'horizontal_label_class': 'col-md-3',

    # Field class to use in horizontal forms
    'horizontal_field_class': 'col-md-9',

    # Set placeholder attributes to label if no placeholder is provided
    'set_placeholder': True,

    # Class to indicate required (better to set this in your Django form)
    'required_css_class': '',

    # Class to indicate error (better to set this in your Django form)
    'error_css_class': 'is-invalid',

    # Class to indicate success, meaning the field has valid input (better to set this in your Django form)
    'success_css_class': 'is-valid',

    # Renderers (only set these if you have studied the source and understand the inner workings)
    'formset_renderers':{
        'default': 'bootstrap4.renderers.FormsetRenderer',
    },
    'form_renderers': {
        'default': 'bootstrap4.renderers.FormRenderer',
    },
    'field_renderers': {
        'default': 'bootstrap4.renderers.FieldRenderer',
        'inline': 'bootstrap4.renderers.InlineFieldRenderer',
    },
}