https://www.junian.dev/tags/javascript/Recent content in Javascript on Junian DevHugo -- gohugo.ioen-USauthor@junian.dev (Junian Triajianto)author@junian.dev (Junian Triajianto)Copyright &copy; 2014 - 2026 <a href='https://www.junian.dev/'>Junian.dev</a>Wed, 30 Sep 2026 04:00:00 +0700https://www.junian.dev/blog/change-cloudflare-node-version/Wed, 30 Sep 2026 04:00:00 +0700author@junian.dev (Junian Triajianto)https://www.junian.dev/blog/change-cloudflare-node-version/<p>Recently, one of my web projects failed to build on Cloudflare. The reason is there is a post-postprocessing script that uses TypeScript instead of JavaScript, and I run it like this:</p> <figure class="highlight"> <button class="btn-clipboard chroma" title="Copy to clipboard"><i class="fa icon-clipboard"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="feather feather-copy"><rect x="9" y="9" width="13" height="13" rx="2" ry="2"/><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"/></svg></i><span class="msg-clipboard"></span></button> <pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl">$ node scripts/indexnow.ts </span></span><span class="line"><span class="cl">node:internal/modules/esm/get_format:219 </span></span><span class="line"><span class="cl"> throw new ERR_UNKNOWN_FILE_EXTENSION<span class="o">(</span>ext, filepath<span class="o">)</span><span class="p">;</span> </span></span><span class="line"><span class="cl"> ^ </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl">TypeError <span class="o">[</span>ERR_UNKNOWN_FILE_EXTENSION<span class="o">]</span>: Unknown file extension <span class="s2">&#34;.ts&#34;</span> <span class="k">for</span> /opt/buildhome/repo/scripts/indexnow.ts </span></span><span class="line"><span class="cl"> at Object.getFileProtocolModuleFormat <span class="o">[</span>as file:<span class="o">]</span> <span class="o">(</span>node:internal/modules/esm/get_format:219:9<span class="o">)</span> </span></span><span class="line"><span class="cl"> at defaultGetFormat <span class="o">(</span>node:internal/modules/esm/get_format:245:36<span class="o">)</span> </span></span><span class="line"><span class="cl"> at defaultLoad <span class="o">(</span>node:internal/modules/esm/load:120:22<span class="o">)</span> </span></span><span class="line"><span class="cl"> at async ModuleLoader.loadAndTranslate <span class="o">(</span>node:internal/modules/esm/loader:580:32<span class="o">)</span> </span></span><span class="line"><span class="cl"> at async ModuleJob._link <span class="o">(</span>node:internal/modules/esm/module_job:116:19<span class="o">)</span> <span class="o">{</span> </span></span><span class="line"><span class="cl"> code: <span class="s1">&#39;ERR_UNKNOWN_FILE_EXTENSION&#39;</span> </span></span><span class="line"><span class="cl"><span class="o">}</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl">Node.js v22.16.0</span></span></code></pre> </figure><p>It makes sense because by the time I wrote this, Cloudflare uses Node.js v22.16.0 by default. Meanwhile, Node.js support for native TypeScript execution is available for v22.18.0 or later, and I personally used v24.18.0 on my MacBook.</p>