diff --git a/repo/code-line-numbers/client.mjs b/repo/code-line-numbers/client.mjs
index eb02472..18be5e3 100644
--- a/repo/code-line-numbers/client.mjs
+++ b/repo/code-line-numbers/client.mjs
@@ -19,7 +19,7 @@ export default async function ({ web }, db) {
 
       const lines = $codeBlock.lastElementChild.innerText.split(/\r\n|\r|\n/),
         wordWrap = $codeBlock.lastElementChild.style.wordBreak === 'break-all';
-      if (lines.at(-1) === '') lines.pop();
+      if (lines.reverse()[0] === '') lines.pop();
 
       let lineNumbers = '';
       for (let i = 1; i <= lines.length + 1; i++) {
diff --git a/repo/outliner/client.mjs b/repo/outliner/client.mjs
index d5251bb..b4ea952 100644
--- a/repo/outliner/client.mjs
+++ b/repo/outliner/client.mjs
@@ -48,7 +48,7 @@ export default async function ({ web, components }, db) {
     for (const $header of $headerBlocks) {
       const id = $header.dataset.blockId.replace(/-/g, ''),
         placeholder = $header.querySelector('[placeholder]').getAttribute('placeholder'),
-        headerDepth = +placeholder.at(-1);
+        headerDepth = +[...placeholder].reverse()[0];
       if (depth && depth < headerDepth) {
         indent += 18;
       } else if (depth > headerDepth) {