"Hi everyone, I'm currently developing multiple online calculators for different countries, including VAT (UK), GST (Australia & NZ), Pay Calculator Australia, and ATAR tools. All calculators are built with clean HTML and JavaScript to avoid conflicts with WordPress themes or plugins. I'm looking for guidance from developers and SEO experts on a few key areas: Performance: Best way to optimize JS calculations and reduce layout shifts"
"I'm looking for guidance from developers and SEO experts on a few key areas: UX/UI: Simple design tips that improve user engagement on calculator pages Localization: Handling currencies, tax formats, and multiple country rules cleanly SEO: Whether adding videos helps or hurts page speed and ranking Structure: Better to keep each calculator on separate domains or a single domain? Any tips, examples, or recommended approaches would be really helpful. Thanks!"
Use small, dependency-free JavaScript modules and avoid layout-shifting DOM changes by reserving space for dynamic elements, using CSS transforms, and batching calculations off the main thread. Implement progressive enhancement so calculations work without JavaScript when possible and lazy-load nonessential assets such as explanatory videos. Design simple, focused UI with clear inputs, instant feedback, tooltips, presets, and mobile-first responsive layout to increase engagement. Centralize localization by separating formatting rules and tax logic into configurable modules for currencies, decimal separators, and country-specific rules. Favor a single domain with logical URL structure and schema markup for SEO, unless legal or branding reasons require separate domains.
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