We Are Improving Our Systems. We are working on improving our systems to serve you better. The site will be back to normal shortly.
Get Started

Javascript in Non Critical Rendering Path: How to Solve It

JavaScript in the non-critical rendering path means scripts that aren't needed to render above-the-fold content are still loaded and executed synchronously during initial page load, blocking the browser's main thread. This happens when scripts lack async or defer attributes, or when bundlers ship a single large JS bundle instead of code-splitting critical from non-critical functionality. The result is delayed First Contentful Paint and Time to Interactive, directly hurting page speed scores and the user's perceived load time.

JavaScript in Non-Critical Rendering Path: How to Solve It

JavaScript in the non-critical rendering path means scripts that aren't needed to render above-the-fold content are still loaded and executed synchronously during initial page load, blocking the browser's main thread. This happens when scripts lack async or defer attributes, or when bundlers ship a single large JS bundle instead of code-splitting critical from non-critical functionality. The result is delayed First Contentful Paint and Time to Interactive, directly hurting page speed scores and the user's perceived load time.

Why this happens

This typically happens because scripts are added to the page without the async or defer attributes, so the browser has to stop parsing the HTML, download the script, and execute it before continuing, even when that script has nothing to do with rendering the content currently in the viewport. Bundlers that ship a single large JavaScript file rather than splitting code by what's actually needed for the initial screen compound the problem, since even a small below-the-fold feature can drag the entire bundle into the critical path. Third-party scripts, widgets, trackers, chat tools, added incrementally over time without anyone auditing their combined loading impact, are a frequent contributor as well.

What it costs you

When non-essential scripts block the main thread during initial load, First Contentful Paint and Time to Interactive both get pushed back, meaning visitors wait longer to see anything and longer before the page responds to input. This hurts page speed scores and Core Web Vitals directly, but the more immediate cost is perceived experience, a page that visibly delays content because of work the visitor doesn't benefit from yet. The pages hit hardest tend to carry the most third-party tooling, often exactly the commercial pages where speed matters most to conversion.
How it works

How we resolve it

01

Diagnose

We audit your current setup and identify the root cause.

02

Fix

We implement targeted corrections using proven methods.

03

Verify

We confirm the issue is resolved and monitor for recurrence.

Ready to grow your business?

Get a free audit from Arising Media. We identify what is holding your business back and show you exactly how to fix it.

What clients say

Results from businesses that trust us.

Excellent on Google ★★★★★ 5.0 out of 5 · 14 reviews
★★★★★

Andre and Arising Media are incredible at what they do and they have more than doubled our business. They go above and beyond to make sure that we succeed.

Brian Sirois
★★★★★

Absolutely loved working with the Arising Media team. They are extremely helpful in explaining any process and answering questions thoughtfully. This is an awesome team that provides quality and expertise.

Venus Vega
★★★★★

We have been working with Arising and Andre for years and their attentiveness to us is unmatched. Insightful direction on strategy and execution is perfect and has helped our business grow!!

Lana Camera
★★★★★

Andre and his team at Arising Media are the most professional team I have come across in terms of Google Search with SEO and SEM. They are extremely knowledgeable and know how to execute a successful plan that converts to leads and revenue growth.

Jamie Taylor
★★★★★

Could not be happier with Andre and his team's experience, professionalism, and support. They are so detail oriented. I could not be more grateful for all the time they took to get to know my brand so they could envision what I could not for myself.

Lily Ignatowski
★★★★★

I've worked with Andre on and off for almost four years. He's kind, courteous, and professional. His work is always top quality and he's always available to answer any questions I might have.

Charlie Serabian
★★★★★

I am very happy with my webpage. Andre & his crew are very technologically up to date, creative & talented. He goes above & beyond the call of duty. Good quality workmanship, great value, very professional & responsive.

Anne Lahr
★★★★★

Arising media is the best company to quickly develop a website or design a menu board.

Altin Muhaxheri
★★★★★

Very responsive throughout entire process. Good experience.

Sean R
★★★★★

Not only were they able to give me new digital boards for in-store but did a complete new website for me which is very easy to navigate. Very professional and hands on.

erolind simnica
★★★★★

Andre and his team are amazing and keep the calls coming in. Keep up the good work.

Chuck Haug
★★★★★

Best digital signage I've ever had! Awesome customer service! I love my website!

Marissa M
★★★★★

High recommend Arising Media to anyone looking for digital solutions.

Jamie Taylor
★★★★★

Andre and Arising Media are incredible at what they do and they have more than doubled our business. They go above and beyond to make sure that we succeed.

Brian Sirois
★★★★★

Absolutely loved working with the Arising Media team. They are extremely helpful in explaining any process and answering questions thoughtfully. This is an awesome team that provides quality and expertise.

Venus Vega
★★★★★

We have been working with Arising and Andre for years and their attentiveness to us is unmatched. Insightful direction on strategy and execution is perfect and has helped our business grow!!

Lana Camera
★★★★★

Andre and his team at Arising Media are the most professional team I have come across in terms of Google Search with SEO and SEM. They are extremely knowledgeable and know how to execute a successful plan that converts to leads and revenue growth.

Jamie Taylor
★★★★★

Could not be happier with Andre and his team's experience, professionalism, and support. They are so detail oriented. I could not be more grateful for all the time they took to get to know my brand so they could envision what I could not for myself.

Lily Ignatowski
★★★★★

I've worked with Andre on and off for almost four years. He's kind, courteous, and professional. His work is always top quality and he's always available to answer any questions I might have.

Charlie Serabian
★★★★★

I am very happy with my webpage. Andre & his crew are very technologically up to date, creative & talented. He goes above & beyond the call of duty. Good quality workmanship, great value, very professional & responsive.

Anne Lahr
★★★★★

Arising media is the best company to quickly develop a website or design a menu board.

Altin Muhaxheri
★★★★★

Very responsive throughout entire process. Good experience.

Sean R
★★★★★

Not only were they able to give me new digital boards for in-store but did a complete new website for me which is very easy to navigate. Very professional and hands on.

erolind simnica
★★★★★

Andre and his team are amazing and keep the calls coming in. Keep up the good work.

Chuck Haug
★★★★★

Best digital signage I've ever had! Awesome customer service! I love my website!

Marissa M
★★★★★

High recommend Arising Media to anyone looking for digital solutions.

Jamie Taylor

Still have questions?

Reach out and our team will get you a straight answer.