1 files changed, 63 insertions, 0 deletions
diff --git a/test/data/html/js/performance-frames.js b/test/data/html/js/performance-frames.js
new file mode 100644
index 00000000..7484f971
--- /dev/null
+++ b/test/data/html/js/performance-frames.js
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2023  Yomitan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+HtmlTestUtilities.runMain(() => {
+    let totalCount = 0;
+    const container = document.querySelector('#container');
+    const counter = document.querySelector('#counter');
+
+    /**
+     * @param {number} count
+     * @param {Event} event
+     */
+    function addElements(count, event) {
+        event.preventDefault();
+
+        if (container !== null) {
+            for (let i = 0; i < count; ++i) {
+                const element = document.createElement('div');
+                element.textContent = 'ありがとう';
+                container.appendChild(element);
+            }
+        }
+
+        totalCount += count;
+        if (counter !== null) {
+            counter.textContent = `${totalCount}`;
+        }
+    }
+
+    for (const element of document.querySelectorAll('.add-elements')) {
+        if (!(element instanceof HTMLElement)) { continue; }
+        const {count} = element.dataset;
+        if (typeof count !== 'string') { continue; }
+        const countValue = Number.parseInt(count, 10);
+        if (!Number.isFinite(countValue)) { continue; }
+        element.addEventListener('click', addElements.bind(null, countValue));
+    }
+
+    const shadowIframeContainer = document.querySelector('#shadow-iframe-container-open');
+    if (shadowIframeContainer !== null) {
+        const shadow = shadowIframeContainer.attachShadow({mode: 'open'});
+        const templateElement = document.querySelector('#shadow-iframe-container-open-content-template');
+        if (templateElement instanceof HTMLTemplateElement) {
+            const template = templateElement.content;
+            const content = document.importNode(template, true);
+            shadow.appendChild(content);
+        }
+    }
+});