Update front-end dependencies
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@ -5,7 +5,7 @@ This extension adds support for Server Sent Events to htmx. See /www/extensions
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*/
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(function(){
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(function() {
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/** @type {import("../htmx").HtmxInternalApi} */
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var api;
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@ -39,17 +39,19 @@ This extension adds support for Server Sent Events to htmx. See /www/extensions
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switch (name) {
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// Try to remove remove an EventSource when elements are removed
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case "htmx:beforeCleanupElement":
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var internalData = api.getInternalData(evt.target)
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if (internalData.sseEventSource) {
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internalData.sseEventSource.close();
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}
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return;
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case "htmx:beforeCleanupElement":
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var internalData = api.getInternalData(evt.target)
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// Try to remove remove an EventSource when elements are removed
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if (internalData.sseEventSource) {
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internalData.sseEventSource.close();
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}
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// Try to create EventSources when elements are processed
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case "htmx:afterProcessNode":
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createEventSourceOnElement(evt.target);
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return;
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// Try to create EventSources when elements are processed
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case "htmx:afterProcessNode":
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ensureEventSourceOnElement(evt.target);
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registerSSE(evt.target);
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}
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}
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});
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@ -66,8 +68,8 @@ This extension adds support for Server Sent Events to htmx. See /www/extensions
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* @param {string} url
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* @returns EventSource
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*/
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function createEventSource(url) {
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return new EventSource(url, {withCredentials:true});
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function createEventSource(url) {
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return new EventSource(url, { withCredentials: true });
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}
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function splitOnWhitespace(trigger) {
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@ -90,7 +92,7 @@ This extension adds support for Server Sent Events to htmx. See /www/extensions
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function getLegacySSESwaps(elt) {
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var legacySSEValue = api.getAttributeValue(elt, "hx-sse");
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var returnArr = [];
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if (legacySSEValue) {
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if (legacySSEValue != null) {
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var values = splitOnWhitespace(legacySSEValue);
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for (var i = 0; i < values.length; i++) {
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var value = values[i].split(/:(.+)/);
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@ -103,63 +105,24 @@ This extension adds support for Server Sent Events to htmx. See /www/extensions
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}
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/**
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* createEventSourceOnElement creates a new EventSource connection on the provided element.
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* If a usable EventSource already exists, then it is returned. If not, then a new EventSource
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* is created and stored in the element's internalData.
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* registerSSE looks for attributes that can contain sse events, right
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* now hx-trigger and sse-swap and adds listeners based on these attributes too
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* the closest event source
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*
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* @param {HTMLElement} elt
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* @param {number} retryCount
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* @returns {EventSource | null}
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*/
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function createEventSourceOnElement(elt, retryCount) {
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if (elt == null) {
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return null;
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function registerSSE(elt) {
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// Find closest existing event source
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var sourceElement = api.getClosestMatch(elt, hasEventSource);
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if (sourceElement == null) {
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// api.triggerErrorEvent(elt, "htmx:noSSESourceError")
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return null; // no eventsource in parentage, orphaned element
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}
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var internalData = api.getInternalData(elt);
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// Set internalData and source
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var internalData = api.getInternalData(sourceElement);
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var source = internalData.sseEventSource;
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// get URL from element's attribute
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var sseURL = api.getAttributeValue(elt, "sse-connect");
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if (sseURL == undefined) {
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var legacyURL = getLegacySSEURL(elt)
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if (legacyURL) {
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sseURL = legacyURL;
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} else {
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return null;
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}
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}
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// Connect to the EventSource
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var source = htmx.createEventSource(sseURL);
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internalData.sseEventSource = source;
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// Create event handlers
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source.onerror = function (err) {
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// Log an error event
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api.triggerErrorEvent(elt, "htmx:sseError", {error:err, source:source});
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// If parent no longer exists in the document, then clean up this EventSource
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if (maybeCloseSSESource(elt)) {
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return;
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}
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// Otherwise, try to reconnect the EventSource
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if (source.readyState === EventSource.CLOSED) {
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retryCount = retryCount || 0;
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var timeout = Math.random() * (2 ^ retryCount) * 500;
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window.setTimeout(function() {
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createEventSourceOnElement(elt, Math.min(7, retryCount+1));
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}, timeout);
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}
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};
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source.onopen = function (evt) {
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api.triggerEvent(elt, "htmx::sseOpen", {source: source});
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}
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// Add message handlers for every `sse-swap` attribute
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queryAttributeOnThisOrChildren(elt, "sse-swap").forEach(function(child) {
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@ -170,23 +133,27 @@ This extension adds support for Server Sent Events to htmx. See /www/extensions
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var sseEventNames = getLegacySSESwaps(child);
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}
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for (var i = 0 ; i < sseEventNames.length ; i++) {
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for (var i = 0; i < sseEventNames.length; i++) {
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var sseEventName = sseEventNames[i].trim();
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var listener = function(event) {
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// If the parent is missing then close SSE and remove listener
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if (maybeCloseSSESource(elt)) {
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source.removeEventListener(sseEventName, listener);
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// If the source is missing then close SSE
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if (maybeCloseSSESource(sourceElement)) {
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return;
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}
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// If the body no longer contains the element, remove the listener
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if (!api.bodyContains(child)) {
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source.removeEventListener(sseEventName, listener);
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}
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// swap the response into the DOM and trigger a notification
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swap(child, event.data);
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api.triggerEvent(elt, "htmx:sseMessage", event);
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};
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// Register the new listener
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api.getInternalData(elt).sseEventListener = listener;
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api.getInternalData(child).sseEventListener = listener;
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source.addEventListener(sseEventName, listener);
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}
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});
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@ -203,24 +170,86 @@ This extension adds support for Server Sent Events to htmx. See /www/extensions
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if (sseEventName.slice(0, 4) != "sse:") {
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return;
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}
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// remove the sse: prefix from here on out
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sseEventName = sseEventName.substr(4);
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var listener = function(event) {
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// If parent is missing, then close SSE and remove listener
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if (maybeCloseSSESource(elt)) {
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source.removeEventListener(sseEventName, listener);
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return;
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var listener = function() {
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if (maybeCloseSSESource(sourceElement)) {
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return
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}
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// Trigger events to be handled by the rest of htmx
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htmx.trigger(child, sseEventName, event);
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htmx.trigger(child, "htmx:sseMessage", event);
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if (!api.bodyContains(child)) {
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source.removeEventListener(sseEventName, listener);
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}
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}
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});
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}
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/**
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* ensureEventSourceOnElement creates a new EventSource connection on the provided element.
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* If a usable EventSource already exists, then it is returned. If not, then a new EventSource
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* is created and stored in the element's internalData.
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* @param {HTMLElement} elt
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* @param {number} retryCount
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* @returns {EventSource | null}
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*/
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function ensureEventSourceOnElement(elt, retryCount) {
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if (elt == null) {
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return null;
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}
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// handle extension source creation attribute
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queryAttributeOnThisOrChildren(elt, "sse-connect").forEach(function(child) {
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var sseURL = api.getAttributeValue(child, "sse-connect");
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if (sseURL == null) {
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return;
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}
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// Register the new listener
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api.getInternalData(elt).sseEventListener = listener;
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source.addEventListener(sseEventName.slice(4), listener);
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ensureEventSource(child, sseURL, retryCount);
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});
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// handle legacy sse, remove for HTMX2
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queryAttributeOnThisOrChildren(elt, "hx-sse").forEach(function(child) {
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var sseURL = getLegacySSEURL(child);
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if (sseURL == null) {
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return;
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}
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ensureEventSource(child, sseURL, retryCount);
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});
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}
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function ensureEventSource(elt, url, retryCount) {
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var source = htmx.createEventSource(url);
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source.onerror = function(err) {
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// Log an error event
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api.triggerErrorEvent(elt, "htmx:sseError", { error: err, source: source });
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// If parent no longer exists in the document, then clean up this EventSource
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if (maybeCloseSSESource(elt)) {
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return;
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}
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// Otherwise, try to reconnect the EventSource
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if (source.readyState === EventSource.CLOSED) {
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retryCount = retryCount || 0;
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var timeout = Math.random() * (2 ^ retryCount) * 500;
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window.setTimeout(function() {
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ensureEventSourceOnElement(elt, Math.min(7, retryCount + 1));
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}, timeout);
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}
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};
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source.onopen = function(evt) {
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api.triggerEvent(elt, "htmx:sseOpen", { source: source });
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}
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api.getInternalData(elt).sseEventSource = source;
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}
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/**
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var result = [];
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// If the parent element also contains the requested attribute, then add it to the results too.
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if (api.hasAttribute(elt, attributeName) || api.hasAttribute(elt, "hx-sse")) {
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if (api.hasAttribute(elt, attributeName)) {
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result.push(elt);
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}
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// Search all child nodes that match the requested attribute
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elt.querySelectorAll("[" + attributeName + "], [data-" + attributeName + "], [hx-sse], [data-hx-sse]").forEach(function(node) {
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elt.querySelectorAll("[" + attributeName + "], [data-" + attributeName + "]").forEach(function(node) {
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result.push(node);
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});
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@ -281,7 +310,7 @@ This extension adds support for Server Sent Events to htmx. See /www/extensions
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api.selectAndSwap(swapSpec.swapStyle, target, elt, content, settleInfo);
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settleInfo.elts.forEach(function (elt) {
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settleInfo.elts.forEach(function(elt) {
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if (elt.classList) {
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elt.classList.add(htmx.config.settlingClass);
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}
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function doSettle(settleInfo) {
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return function() {
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settleInfo.tasks.forEach(function (task) {
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settleInfo.tasks.forEach(function(task) {
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task.call();
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});
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settleInfo.elts.forEach(function (elt) {
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settleInfo.elts.forEach(function(elt) {
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if (elt.classList) {
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elt.classList.remove(htmx.config.settlingClass);
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}
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}
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}
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})();
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function hasEventSource(node) {
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return api.getInternalData(node).sseEventSource != null;
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}
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})();
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