DEV: removes jquery usage from onebox (#14683)

app/assets/javascripts/discourse/app/lib/load-oneboxes.js

@@ -21,7 +21,7 @@ export function loadOneboxes(
   ).length;
 
   container
-    .querySelectorAll(`a.onebox, a.inline-onebox-loading`)
+    .querySelectorAll("a.onebox, a.inline-onebox-loading")
     .forEach((link) => {
       const isInline = link.classList.contains("inline-onebox-loading");
 

app/assets/javascripts/discourse/tests/unit/lib/oneboxer-test.js

@@ -40,9 +40,9 @@ module("Unit | Utility | oneboxer", function () {
     await loadOnebox(element);
 
     assert.ok(
-      localCache["http://somegoodurl.com"]
-        .prop("outerHTML")
-        .indexOf("Yet another collaboration tool") !== -1,
+      localCache["http://somegoodurl.com"].outerHTML.indexOf(
+        "Yet another collaboration tool"
+      ) !== -1,
       "stores the html of the onebox in a local cache"
     );
     assert.ok(

app/assets/javascripts/pretty-text/addon/inline-oneboxer.js

@@ -24,12 +24,12 @@ export function applyInlineOneboxes(inline, ajax, opts) {
     result["inline-oneboxes"].forEach((onebox) => {
       if (onebox.title) {
         _cache[onebox.url] = onebox;
+
         let links = inline[onebox.url] || [];
         links.forEach((link) => {
-          $(link)
-            .text(onebox.title)
-            .addClass("inline-onebox")
-            .removeClass("inline-onebox-loading");
+          link.innerText = onebox.title;
+          link.classList.add("inline-onebox");
+          link.classList.remove("inline-onebox-loading");
         });
       }
     });

app/assets/javascripts/pretty-text/addon/oneboxer-cache.js

@@ -24,6 +24,5 @@ export function normalize(url) {
 }
 
 export function lookupCache(url) {
-  const cached = localCache[normalize(url)];
-  return cached && cached.prop("outerHTML");
+  return localCache[normalize(url)]?.outerHTML;
 }

app/assets/javascripts/pretty-text/addon/oneboxer.js

@@ -1,6 +1,6 @@
 import {
   failedCache,
-  localCache,
+  lookupCache,
   normalize,
   resetFailedCache,
   resetLocalCache,
@@ -21,37 +21,38 @@ export function resetCache() {
 }
 
 function resolveSize(img) {
-  $(img).addClass("size-resolved");
+  img.classList.add("size-resolved");
 
   if (img.width > 0 && img.width === img.height) {
-    $(img).addClass("onebox-avatar");
+    img.classList.add("onebox-avatar");
   }
 }
 
 // Detect square images and apply smaller onebox-avatar class
-function applySquareGenericOnebox($elem) {
-  if (!$elem.hasClass("allowlistedgeneric")) {
+function applySquareGenericOnebox(elem) {
+  if (!elem.classList.contains("allowlistedgeneric")) {
     return;
   }
 
-  let $img = $elem.find(".onebox-body img.thumbnail");
-  let img = $img[0];
+  let img = elem.querySelector(".onebox-body img.thumbnail");
 
   // already resolved... skip
-  if ($img.length !== 1 || $img.hasClass("size-resolved")) {
+  if (!img || img.classList.contains("size-resolved")) {
     return;
   }
 
   if (img.complete) {
     resolveSize(img);
   } else {
-    $img.on("load.onebox", () => {
-      resolveSize(img);
-      $img.off("load.onebox");
-    });
+    img.addEventListener("load", _handleLoadingOneboxImages);
   }
 }
 
+function _handleLoadingOneboxImages() {
+  resolveSize(this);
+  this.removeEventListener("load", _handleLoadingOneboxImages);
+}
+
 function loadNext(ajax) {
   if (loadingQueue.length === 0) {
     timeout = null;
@@ -60,7 +61,7 @@ function loadNext(ajax) {
 
   let timeoutMs = 150;
   let removeLoading = true;
-  const { url, refresh, $elem, categoryId, topicId } = loadingQueue.shift();
+  const { url, refresh, elem, categoryId, topicId } = loadingQueue.shift();
 
   // Retrieve the onebox
   return ajax("/onebox", {
@@ -74,16 +75,19 @@ function loadNext(ajax) {
   })
     .then(
       (html) => {
-        let $html = $(html);
-        setLocalCache(normalize(url), $html);
-        $elem.replaceWith($html);
-        applySquareGenericOnebox($html);
+        let template = document.createElement("template");
+        template.innerHTML = html.trim();
+        const node = template.content.firstChild;
+
+        setLocalCache(normalize(url), node);
+        elem.replaceWith(node);
+        applySquareGenericOnebox(node);
       },
       (result) => {
-        if (result && result.jqXHR && result.jqXHR.status === 429) {
+        if (result?.jqXHR?.status === 429) {
           timeoutMs = 2000;
           removeLoading = false;
-          loadingQueue.unshift({ url, refresh, $elem, categoryId, topicId });
+          loadingQueue.unshift({ url, refresh, elem, categoryId, topicId });
         } else {
           setFailedCache(normalize(url), true);
         }
@@ -92,13 +96,13 @@ function loadNext(ajax) {
     .finally(() => {
       timeout = later(() => loadNext(ajax), timeoutMs);
       if (removeLoading) {
-        $elem.removeClass(LOADING_ONEBOX_CSS_CLASS);
-        $elem.data("onebox-loaded");
+        elem.classList.remove(LOADING_ONEBOX_CSS_CLASS);
+        elem.dataset.oneboxLoaded = "";
       }
     });
 }
 
-// Perform a lookup of a onebox based an anchor $element.
+// Perform a lookup of a onebox based an anchor element.
 // It will insert a loading indicator and remove it when the loading is complete or fails.
 export function load({
   elem,
@@ -109,13 +113,13 @@ export function load({
   offline = false,
   synchronous = false,
 }) {
-  const $elem = $(elem);
-
   // If the onebox has loaded or is loading, return
-  if ($elem.data("onebox-loaded")) {
+
+  if (elem.dataset.oneboxLoaded) {
     return;
   }
-  if ($elem.hasClass(LOADING_ONEBOX_CSS_CLASS)) {
+
+  if (elem.classList.contains(LOADING_ONEBOX_CSS_CLASS)) {
     return;
   }
 
@@ -124,9 +128,9 @@ export function load({
   // Unless we're forcing a refresh...
   if (!refresh) {
     // If we have it in our cache, return it.
-    const cached = localCache[normalize(url)];
+    const cached = lookupCache(url);
     if (cached) {
-      return cached.prop("outerHTML");
+      return cached;
     }
 
     // If the request failed, don't do anything
@@ -141,10 +145,10 @@ export function load({
   }
 
   // Add the loading CSS class
-  $elem.addClass(LOADING_ONEBOX_CSS_CLASS);
+  elem.classList.add(LOADING_ONEBOX_CSS_CLASS);
 
   // Add to the loading queue
-  loadingQueue.push({ url, refresh, $elem, categoryId, topicId });
+  loadingQueue.push({ url, refresh, elem, categoryId, topicId });
 
   // Load next url in queue
   if (synchronous) {