This feature would automatically populate the once a user enters a valid 5-digit Sri Lankan postal code. 1. Core Functionality
Use Regex to ensure the input is exactly 5 numeric digits (e.g., ^(\d{5})$ ).
Use a lightweight Node.js/Express service or a Python/Flask endpoint to serve the mapping.
Instantly update the UI fields for "City" and "District" to reduce user typing effort. 2. Key Mapping Examples Postal Code 00100 Colombo 01 (Fort) 20000 Kandy 80000 Galle 40000 Jaffna 3. Technical Implementation Strategy
A simple onChange event listener on the zip code input field to trigger the fetch request.
Query a local dataset or an API like srilankan-postalcode to match the code to its corresponding city.
To develop a feature around (often colloquially referred to as "ZIP codes" despite being a 5-digit numeric system), you should focus on a Postcode-to-Location lookup or Address Validation tool.
Srilankan55zip Online
This feature would automatically populate the once a user enters a valid 5-digit Sri Lankan postal code. 1. Core Functionality
Use Regex to ensure the input is exactly 5 numeric digits (e.g., ^(\d{5})$ ). srilankan55zip
Use a lightweight Node.js/Express service or a Python/Flask endpoint to serve the mapping. This feature would automatically populate the once a
Instantly update the UI fields for "City" and "District" to reduce user typing effort. 2. Key Mapping Examples Postal Code 00100 Colombo 01 (Fort) 20000 Kandy 80000 Galle 40000 Jaffna 3. Technical Implementation Strategy Use a lightweight Node
A simple onChange event listener on the zip code input field to trigger the fetch request.
Query a local dataset or an API like srilankan-postalcode to match the code to its corresponding city.
To develop a feature around (often colloquially referred to as "ZIP codes" despite being a 5-digit numeric system), you should focus on a Postcode-to-Location lookup or Address Validation tool.