Senior LevelHTML & Semantic Web
How does the Speculation Rules API prerender future page navigations in the background?
❓ Interview Prompt: Explain Speculation Rules API (<script type="speculationrules">), prerender vs prefetch, and instant page loads.
The Speculation Rules API allows web applications to instruct browsers to prerender complete web pages (downloading HTML, CSS, JS, and executing layout rendering in an invisible background tab) before the user clicks a link!
Instant Navigations:
When the user clicks the link, the background prerendered page is swapped into view instantly with 0ms latency!
Code Implementation Example
html
<script type="speculationrules">
{
"prerender": [
{
"source": "list",
"urls": ["/checkout", "/product/101"]
}
]
}
</script>💡Configuring background page prerendering via Speculation Rules API.
🎯 Interview Key Takeaway
Use Speculation Rules API to prerender predicted next-page navigations in invisible background tabs for instant page loads.
#Speculation Rules#Prerender#Performance#Senior
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