Merge pull request #1331 from hirschenberger/master

Trigger event when a SSE-source is opened

Author: benpate

src/ext/sse.js

@@ -155,6 +155,10 @@ This extension adds support for Server Sent Events to htmx.  See /www/extensions
 				}, timeout);
 			}			
 		};
+
+		source.onopen = function (evt) {
+			api.triggerEvent(elt, "htmx::sseOpen", {source: source});
+		}
 
 		// Add message handlers for every `sse-swap` attribute
 		queryAttributeOnThisOrChildren(elt, "sse-swap").forEach(function(child) {

www/reference.md

@@ -159,6 +159,7 @@ The table below lists all other attributes available in htmx.
 | [`htmx:pushedIntoHistory`](/events#htmx:pushedIntoHistory)  | triggered after an url is pushed into history
 | [`htmx:responseError`](/events#htmx:responseError)  | triggered when an HTTP response error (non-`200` or `300` response code) occurs
 | [`htmx:sendError`](/events#htmx:sendError)  | triggered when a network error prevents an HTTP request from happening
+| [`htmx:sseOpen`](/events#htmx:sseOpen)  | triggered when a SSE source is opened
 | [`htmx:sseError`](/events#htmx:sseError)  | triggered when an error occurs with a SSE source
 | [`htmx:swapError`](/events#htmx:swapError)  | triggered when an error occurs during the swap phase
 | [`htmx:targetError`](/events#htmx:targetError)  | triggered when an invalid target is specified