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Posted on • Originally published at Medium

Making it Snappy: How NextBlock Intelligently Loads Scripts for Optimal Performance

A website can load its content in a flash, but if users can't click, scroll, or interact with it, the experience feels broken. This delay, known as Time to Interactive (TTI), is often caused by third-party scripts (for analytics, chat widgets, etc.) blocking the main thread.

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At NextBlock CMS, we're engineering a solution to this problem from the core. We are meticulously auditing every script and using the Next.js component to load them intelligently, ensuring your site becomes interactive as quickly as possible.</p> <p>Our approach uses two key strategies:</p> <p>strategy=&quot;afterInteractive&quot; for Essential Scripts: For scripts that are important but not critical for the initial render (like analytics), we use this strategy. It tells the browser to load the script after the main page content has loaded and is interactive.</p> <p>strategy=&quot;lazyOnload&quot; for Low-Priority Scripts: For scripts that can wait until everything else is done (like customer support chat widgets or social media embeds), we use lazyOnload. This defers their execution until the browser is idle, ensuring they have zero impact on initial load performance.</p> <p>By prioritizing the user experience and deferring non-critical resources, NextBlock sites will not only load fast but feel fast, directly improving Core Web Vitals and user satisfaction.</p> <ol> <li>X / Twitter Version Tweet: Ever land on a site but can&#39;t click anything for a few seconds? That&#39;s poor Time to Interactive (TTI), often caused by 3rd-party scripts.</li> </ol> <h1> <a name="nextblockcms-tackles-this-by-intelligently-loading-scripts-with-nextjs-using-afterinteractive-amp-lazyonload-strategies" href="#nextblockcms-tackles-this-by-intelligently-loading-scripts-with-nextjs-using-afterinteractive-amp-lazyonload-strategies" class="anchor"> </a> NextBlockCMS tackles this by intelligently loading scripts with Next.js, using afterInteractive &amp; lazyOnload strategies. </h1> <p>Result: Your site feels faster, because it is faster. #WebPerf #NextJS #CoreWebVitals</p>

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