Showing a loader for longer than required because it looks good?

1. How long to wait before showing a spinner?
2. How long should a preloader be?
3. How to show loading spinner in javascript?

How long to wait before showing a spinner?

The 4-Second Rule. If you want users to stay on your app, don't use spinners for processes that take longer than 4 seconds to load. A research study has found that the tolerable wait time for users is 4 seconds. This finding means that their behavioral intentions begin to change after 4 seconds.

How long should a preloader be?

A great CSS loading animation doesn't need to outshine the rest of the content on your website. A preloader only needs to keep a customer's attention between 1500-5000 milliseconds (1.5-5 seconds).

How to show loading spinner in javascript?

Step 1: Add a background with a spinner gif on top of the page, then remove them when everything is loaded. Step 2: Add a little script right after the opening body tag to start displaying the load/splash screen. Save this answer.