mapbox/mapbox-gl-js

[accessibility] Accessible target size for controls

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#11,037 建立於 2021年9月18日

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good first issue

描述

The WCAG 2.1 SC 2.5.5 Target Size requires targets for pointer input to be at least 44 by 44 in CSS pixels. Meeting this requirement has multiple benefits, it'd be great to pass this criteria for the commonly used controls:

  • Attribution control (mapboxgl-ctrl-attrib-button)
  • Popup close button (mapboxgl-popup-close-button)
  • Fullscreen control (mapboxgl-ctrl-fullscreen)
  • Location control (mapboxgl-ctrl-geolocate)
  • Markers (mapboxgl-marker)
  • Navigation controls:
    • Zoom in (mapboxgl-ctrl-zoom-in)
    • Zoom out (mapboxgl-ctrl-zoom-out)
    • Compass/reset bearing (mapboxgl-ctrl-compass)
  • etc.?

It may not be desirable to increase the size of the icons themselves, in which case padding can be used to increase the size of the tap targets.

貢獻者指南

技術棧
javascriptcsshtml
領域
accessibility
議題類型
accessibility
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
half day
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
CSSHTMLJavaScript
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
70
研究方向
This issue asks to ensure that interactive controls in mapbox gl js meet WCAG 2.1 target size requirements by adding CSS padding to increase the tap target area to at least 44x44 CSS pixels. The controls identified include: attribution button, popup close button, fullscreen/geolocation controls, markers, and navigation zoom/compass buttons. Look for the control classes like 'mapboxgl ctrl attrib button', 'mapboxgl popup close button', etc. in the CSS source files (likely in 'src/css/'). Add padding to these elements while keeping the icon size unchanged. Test that the padding does not break layout. The issue has no linked PRs, so implementation is open. Review the WCAG understanding document linked in the issue for guidance.