getzola/zola

Feature request : Add support for lazy loading images

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#2,055 opened on Dec 15, 2022

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 (2 comments) (3 reactions) (0 assignees)Rust (15,349 stars) (1,046 forks)batch import
enhancementhelp wanted

Description

To make our pages load faster and minimize the use of bandwidth/memory when a user does not scroll a whole page ; we can use the following attribute to make the image load only when needed (lazy loading):

<img src="image.jpg" loading="lazy" />

references :

Contributor guide

Tech stack
rusthtml
Domain
frontendperformance
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Familiarity with Zola's shortcode systemBasic HTML knowledge
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
90
Research direction
Examine Zola's shortcode system, particularly the `img` shortcode in the templates directory. The implementation likely requires modifying the HTML output to include the `loading="lazy"` attribute. Check if there are any existing discussions or PRs mentioned in the issue comments. Also consider adding support for `loading` attribute in markdown image rendering. Test with various browsers as per caniuse link.