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10 items on 10 Sep 2026
JavaScript React

Benchmarking in-app announcement widgets: 150KB vs 3.8KB SDK

We recently ran Lighthouse audits across 40 top B2B SaaS web applications. Over 65% of them were failing Interaction to Next Paint (INP) and Largest Contentful Paint (LCP) targets. The culprit? Legacy onboarding and…

Source: DEV JavaScript feed Pavan S Poojary
JavaScript React

Soul in Motion — 6:16 PM | 2026-09-10

TL;DR Built an interactive Frankenstein demo that animates scenes based on the text, including subtle air‑visualization. Expanded the concept into a shelf‑level platform, deploying a 10‑chapter book with scene…

Source: DEV JavaScript feed Dev Rajput
JavaScript React

Fix Next.js Parallel Routes 404 on Refresh | App Router Guide

The Frustration of the Disappearing Dashboard You’ve spent weeks architecting the perfect Next.js dashboard. You’ve leveraged the App Router’s power to implement parallel routes, creating a sophisticated, multi-pane UI…

Source: DEV JavaScript feed Nainik Mehta
JavaScript React

Ampire

import React, { useState } from "react"; import CommentSection from "./CommentSection"; function timeAgo(dateStr) { const seconds = Math.floor((Date.now() - new Date(dateStr).getTime()) / 1000); const units = [ ["year",…

Source: DEV JavaScript feed Ampire