Improvement and New Features on Sitecore 15.0
Several features on Sitecore JSS 15.0 are keen to greatly improve on the developer experience as well as the application performance. Sitecore has also included new dynamic state management tools for handling and building web applications which greatly simplify deployment processes for modern JavaScript frameworks.
Migration path from previous versions
Moving to JSS 15.0 isn’t as scary as you might think. The team’s put together a clear migration path that won’t leave you stranded.
The automated upgrade tool handles a lot of the heavy lifting:
npx @sitecore-jss/update-package@latest
This tool:
• Analyze your existing JSS codebase
• Updates package dependencies
• Transforms deprecated API calls
• Flags code that needs manual attention
Characteristic improvements and enhancements.
Since the release of Sitecore JSS 15.0, many users have expressed their excitement for the new modern features. With many users awaiting since the last update in version 13, this new upgrade surely has added remarkable features along with a polish to user and developer experience.
In practice, it goes something like this:
As discussed in blogpostcard, usecomponentgraphql is a powerful tool that pulls data to the user defined parameters from the backend GraphQL server.
Here’s a practical example of how it functions:
Import {Usecomponentgraphql}@SiteCore-JSS/SiteCore-JSS-React ';
Const blogpostcard = (props) => {
Const {data} = usecomponentgraphql (`
Query Blogpostdata ($ ID: String!) {
Blogpost (ID: $ ID) {
Topic
Author
Thumbnaral
,
,
`, {id: props.postid});
return (
<Div Classname = "Blog-Post-Card">
<img src = {data? .blogpost?
<h3> {data? .Blogpost? .Title} </h3>
{data by <p>? .Blogpost? .Author}
</ Div>
,
, Performance Improvements
JSS 15.0 delivers significant performance gains over version 14.
Key improvements include:
• Lazy Hydration: Components hydrate only when entering the viewport or on user interaction, reducing initial JavaScript execution time by up to 60%.
• Incremental Static Regeneration (ISR): Offers flexible page pre-rendering, route specific staleness thresholds, and avoids full rebuilds on content changes, ideal for data-heavy sites.
• Revamped Bundling: Features automatic code splitting by route, deduplication of shared dependencies, and preloading of critical components.
• Enhanced Headless SXA integration makes the construction of websites simpler while also making them flexible. SXA drag and drop user interface is very powerful and when combined with the CAD tools in JSS it becomes an incredible constructor.
Advantages:
– They give full component styling using the SXA and theme.
– They set styles in JSS components, which are pre
Significant performance boosts in JSS 15.0:
| Metric | JSS 14.0 | JSS 15.0 | Improvement |
| First Contentful Paint | 1.2s | 0.8s | 33% faster |
| Time to Interactive | 3.8s | 2.1s | 45% faster |
| JS Bundle Size | 285KB | 215KB | 25% smaller |
| Layout Service Response | 120ms | 75ms | 38% faster |
| Server-side Rendering | 320ms | 180ms | 44% faster |