[Outreachy Task Submission] Accessibility Issue with the 'main-filter toggle' button value text in map/data screens

[Chiemezuo]

Intro

This is an Accessibility issue I found with the 'main filter' toggle button in the Map/Data screen. It is from the arrow button that shows or hides surveys and sources, depending on the toggle state.

Issue

The toggle button for main-filter has no value text. This is a violation of WCAG Success Criterion 1.1.1 (Level A) - Non-text content. See

Description.

Success Criterion 1.1.1 (Level A) - Non-text content requires that all non-text content presented to users has a text alternative that serves the equivalent purpose, except for situations where the content is intended to be omitted by the author or is decorative in nature.

Impact

Accessibility software that can either convert text to visuals (for deaf people), and braille (for blind people) will not work. People who cannot understand the meaning of images/icons would struggle with this. Additionally, there would be no way to search for visual content in a text-based manner.

Fix

Add a value text to the button. I will raise a PR for this, shortly.