JavaScript

Jun 10, 2025 · Frontend Development

What JavaScript APIs Are Deprecated and Which Modern Alternatives Should You Use?

This article outlines ten JavaScript APIs that have been deprecated or discouraged—such as document.execCommand, escape, XMLHttpRequest sync mode, and performance.timing—explaining why they’re problematic and providing modern, safer alternatives like the Clipboard API, fetch, PerformanceNavigationTiming, and standardized string methods.