Optimization (accessibility): [user-scalable="no"] or [maximum-scale] attribute is less than 5

[rfultz]

Background

Looking to optimize the site's performance and that of the homepage specifically, the Lighthouse tool in Chromium browsers has made some suggestions. Some of these will have repercussions throughout the app so we're going to make them their own tickets.

Accessibility Recommendation: [user-scalable="no"] is used in the element or the [maximum-scale] attribute is less than 5

Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. details

Overview

Can we make the page/site zoomable?

Benefit (the 80 of 80/20)

Significant for site visitors with low vision

Effort (the 20 of 80/20)

Minimal

Complications

• Would changing this break the site for other site visitors?

Related tickets

• Preload key requests
• Remove unused JavaScript
• Remove unused CSS
• Preconnect to required origins
• Eliminate render-blocking resources
• Ensure text remains visible during webfont load
• Reduce the impact of third-party code
• Does not use passive listeners to improve scrolling performance
• Image elements do not have explicit width and height
• Serve static assets with an efficient cache policy
• Minimize main-thread work
• Avoid an excessive DOM size
• Reduce JavaScript execution time
• Avoid enormous network payloads
• [aria-hidden="true"] elements contain focusable descendents
• Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children
• [aria-*] attributes do not have valid values
• ARIA IDs are not unique
• Lists do not contain only
• elements and script supporting elements (<script> and )
• Links to cross-origin destinations are unsafe
• Serves images with low resolution