Utilizing the replace() function to add a highlighting effect to text in Django 2.1

Question

Utilizing the replace() function to add a highlighting effect to text in Django 2.1

I am currently working on a unique template filter that will enhance search results by highlighting keywords, similar to how Google search results are displayed.

Here is the code for the custom filter:

register = template.Library()
@register.filter
@stringfilter
def highlight(value, search_term):
    return value.replace(search_term, "<span class='highlight'>%s</span>" % search_term)

However, the filter currently does not apply the CSS class <span class='highlight'> to the targeted word. Instead, it displays the text in the browser exactly as

<span class='highlight'>word</span>

. For example, "The most desired car brand right now is

<span class='highlight'>Tesla</span>

." How can I modify the code to actually change the CSS class of the targeted word using the replace() method?

html css django replace

Answer 1

Answer №1

The main concern lies in the necessity to autoscape when applying filters that modify HTML elements. For more information on this topic, refer to https://docs.djangoproject.com/en/2.1/howto/custom-template-tags/#filters-and-auto-escaping

Here's a sample of the code in action:

from django import template
from django.utils.safestring import mark_safe
from django.utils.html import conditional_escape
from django.template.defaultfilters import stringfilter

register = template.Library()

@register.filter(needs_autoescape=True)
@stringfilter
def highlight(value, search_term, autoescape=True):
    return mark_safe(value.replace(search_term, "<span class='highlight'>%s</span>" % search_term))

Answer 2

The main concern lies in the necessity to autoscape when applying filters that modify HTML elements. For more information on this topic, refer to https://docs.djangoproject.com/en/2.1/howto/custom-template-tags/#filters-and-auto-escaping

Here's a sample of the code in action:

from django import template
from django.utils.safestring import mark_safe
from django.utils.html import conditional_escape
from django.template.defaultfilters import stringfilter

register = template.Library()

@register.filter(needs_autoescape=True)
@stringfilter
def highlight(value, search_term, autoescape=True):
    return mark_safe(value.replace(search_term, "<span class='highlight'>%s</span>" % search_term))

Utilizing the replace() function to add a highlighting effect to text in Django 2.1

Answer №1

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