What is the first input delay, how does it work in core web vitals. How to fix this problem to improve the performance of your website.
The first input delay is a user experience when the user clicks on your website and then after loading all the content and images of your website. The user clicks on any link, then after clicking on your link how your website works that is the first input delay.
Today you will learn how to fix this first input delay error and how to check in tools to improve this performance.
What is First Input Delay
Let us discuss this first input delay using an example so that you can easily understand.
Just think that you are in the forest and a tiger comes in front of you, what will you do now? Your mind will freeze for some time. Then after a few seconds your brain will work. Hey, Tiger is coming here, run away from here soon.
Now when you see the tiger and run after seeing the tiger. The time between you seeing the tiger and running away from that place, that time is the first input delay.
How First Input Delay (FID) Works
When your visitor visits your site and after loading all content of your site he will click on some link or element. FID is not that time when the action occurs after clicking the button. FID is the time when the site starts working after clicking on the button.
So FID means how long it takes to register user touch, tap or click and how that click is taking action on that.
Google note your FID score in milliseconds. If your FID score is in 100ms then it is good . If your FID is 300ms then you need to improve it but if your FID score is 300ms higher then it will show poor performance.
You cannot see your website FID score in page speed insight or any other tool. Google notes your FID score using field data means that it collects data from live users when they click on a link.
You can check your FID score using TBT. If your TBT score is good, then your FID score is also good.
How Improve Your TBT Score
When you work on improving the TBT score, your FID will also be fix.
- Optimize CSS
- Minimize Main Thread Work
- Reduce Third Party Code
There are many CSS files in our website, which is unnecessary, which makes no sense, then minify all CSS.
Minimize Main Thread work
The browser will not allow the user to input for as long as it remains busy. You will also find a way to solve this in Page Speed Insight.
In this image you can see how much time the main thread is taking.
Reduce Third Party Code
Third party code is code that comes from outside in your website like google analytics, chat using this website, they will add some dynamic code to your website.
All these things increase the time of your website. To make it work, you use the third party code that is required for you.
If your competitor is using a third party tool, it does not mean that you should also use it. Use only if you need these functionality.
So this FID is a little bit up down metric but if you work on all these things then your FID score will get better.
When a visitor visits your website, the browser first loads all the content from the bottom of your website and then slowly loads the top part but the visitor wants to read the top part first.
When your website loads it completely using any browser it loads the first bottom section of your website then the top part but the user needs the top part first.
For this, you can tell your developer to save the upper part in a separate folder and save the lower part in a different folder so that when someone opens your site, the top part is visible to the visitor first. By the time he reads the top part, the lower part will be loaded automatically.
If anyone visit your website, it starts reading from higher than and doesn’t run down right away and if you’re saving and loading the highest a part of your web site in an exceedingly separate folder, then there’s no downside with loading speed before of the user can return and also the loading speed and performance of your web site can stay sensible.
Google recently updated to its Corel Web Vital to improve its CLS, FID, and LCP scores and improve your mobile performance.
If you have worked on this following point then you can easily fix your first input delay. I hope you guys have understood this blog post. If you like this post, you can share it with your friends.
In the next articles we will focus on the improvement in CLS score.