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Elasticsearch · Module 10 of 10

Building search for an app

Putting Elasticsearch behind a real product search box.

📖 Key ideas

  1. Use the official client (Python, Node.js, Java) from your backend, never from the browser.
  2. Autocomplete uses completion suggesters or edge n-grams.
  3. Highlighting returns the matched words in bold snippets.
  4. Pagination: from/size for small pages, search_after for deep paging.
  5. Secure the cluster with users, roles and TLS.
💡 Real-life example: Like a shop assistant who guesses the product as you speak, shows where the word matched, and never lets customers into the store room.
AutocompleteSuggests results as the user types
HighlightMarks matched words in results
search_afterEfficient deep pagination
RoleA set of permissions for users