Slack: Several changes:

- Make the headers of search results and the headers of individual threads in All Threads level 3 headings.
- Make messages within a search result list items.
- Make day separators level 3 headings instead of level 2.
- Make the current channel title a level 2 heading.
- Remove code to make heading level 2 for about channel pane header, as Slack now does this itself.

Author: jcsteh

SlackA11yFixes.user.js

@@ -66,7 +66,7 @@ function onNodeAdded(target) {
 	}
 	var elem;
 	// Make existing messages list items.
-	for (elem of target.querySelectorAll("#msgs_div .message, #threads_msgs .message, #convo_container .message"))
+	for (elem of target.querySelectorAll("#msgs_div .message, #threads_msgs .message, #convo_container .message, #search_results_container .message"))
 		elem.setAttribute("role", "listitem");
 	for (elem of target.querySelectorAll(".copy_only")) {
 		// This includes text such as the brackets around message times.
@@ -79,11 +79,16 @@ function onNodeAdded(target) {
 		elem.setAttribute("aria-label", "star");
 		setStarred(elem);
 	}
-	// Make headings for day separators in message history, about channel pane heading.
-	for (elem of target.querySelectorAll(".day_divider,.heading")) {
+	// Make the current channel title a level 2 heading.
+	if (elem = target.querySelector("#channel_title")) {
 		elem.setAttribute("role", "heading");
 		elem.setAttribute("aria-level", "2");
 	}
+	// Make level3 headings for day separators in message history, individual search results, individual threads in All Threads.
+	for (elem of target.querySelectorAll(".day_divider, .search_result_header, .thread_header")) {
+		elem.setAttribute("role", "heading");
+		elem.setAttribute("aria-level", "3");
+	}
 	// Kill some extraneous white space.
 	for (elem of target.querySelectorAll(".message_gutter, .message_content > i.copy_only br")) {
 		elem.setAttribute("aria-hidden", "true");

readme.md

@@ -76,7 +76,7 @@ It does the following:
 - Makes options for each message (Start a thread, Share message, etc.) accessible.
  To access these, move the mouse to the text of a message.
  They then appear above the author's name as buttons.
-- Makes day separators in the message history and the about channel pane heading accessible as headings.
+- Makes the current channel title, day separators in the message history, the headers of individual search results and the headers of individual threads in All Threads accessible as headings.
 - Reports incoming messages automatically (using a live region).
 - Hides an editable area which isn't shown visually.