Alexander Anufriev — Notes from real frontend work. https://anu3ev.com/blog/ I build complex browser tools with Vue and TypeScript: image, text and code editors with AI features inside them, merchant workflows, and the shared libraries behind them. For 5 years at inSales, a B2B SaaS platform for running online businesses with 60,000+ merchants, I took unclear features from first questions to production and kept them running after release. en Replacing a cache timer with "has this product changed?" https://anu3ev.com/blog/cache-by-change-not-timer/ https://anu3ev.com/blog/cache-by-change-not-timer/ A storefront library cached product data for a fixed time, so pages either showed stale data or re-requested products that hadn't changed. Comparing each product's update timestamp cut product-data requests by about 70%. Tue, 20 Oct 2026 20:00:00 GMT Teaching Monaco to read Liquid templates: the hard part is knowing the language under the cursor https://anu3ev.com/blog/monaco-liquid-tokenizer/ https://anu3ev.com/blog/monaco-liquid-tokenizer/ How a custom tokenizer for HTML with Liquid, JavaScript and CSS islands made suggestions follow the cursor, and why the editor shipped as a versioned package with a three-function browser API. Tue, 20 Oct 2026 20:00:00 GMT One CAPTCHA token, two waiting forms: what invisible verification broke across a platform https://anu3ev.com/blog/one-token-two-forms/ https://anu3ev.com/blog/one-token-two-forms/ Invisible CAPTCHA looks like a script tag. Across several generations of store forms it turned into async-state bugs and a production rollback caused by a settings record that didn't exist. Tue, 20 Oct 2026 20:00:00 GMT The redesign removed the sidebar, and with it the only way to fix a broken page https://anu3ev.com/blog/redesign-recovery-mode/ https://anu3ev.com/blog/redesign-recovery-mode/ A cleaner visual editor moved widget controls into the storefront preview. When custom code breaks that preview, the controls disappear with it. This is how I found that gap and the recovery mode I built for it. Tue, 20 Oct 2026 20:00:00 GMT Vue 3 didn't make our autocomplete slow. 244,650 comparisons did https://anu3ev.com/blog/vue-3-proxy-deep-comparison/ https://anu3ev.com/blog/vue-3-proxy-deep-comparison/ After a Vue 3 migration, an autocomplete with 700 domain zones took about 12 seconds to open. The cause was an old quadratic deduplication that became expensive once it read every object through a reactive Proxy. Tue, 20 Oct 2026 20:00:00 GMT