Expired50% confidenceFactExact time
JavaScript is a single-threaded language; if network requests are executed synchronously, the entire page will freeze completely while waiting for a server response.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
Valid until: 9/30/2026(expired)
Sources
JavaScript Fundamentals: A Complete Guide to Variables, DOM Manipulation, Event Handling, and API Calls
bilibiliFireUG技术社区6/21/2026
Related Claims
UnverifiedJavaScript's asynchronous mechanism allows the program to continue executing other code while waiting for a network response, preventing the page from freezing.83% similarUnverifiedJavaScript is a single-threaded language.70% similarUnverified在移动设备上切换应用时，浏览器可能将页面从active降级为frozen状态，此时JavaScript执行被暂停、定时器停止、WebSocket连接可能断开64% similarUnverifiedJavaScript's single-threaded environment simplifies concurrency safety issues relatively due to its event loop characteristics, but they still require careful handling in multi-Worker or distributed execution scenarios.63% similarUnverifiedPage-Agent 以 JavaScript 直接运行于页面沙箱内，可同步访问 document 对象、监听 MutationObserver 变化，无需处理跨进程序列化61% similar
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