JavaScript 的内存生命周期和垃圾回收。 事件循环 JavaScript 拥有基于“事件循环”的运行时模型。 浏览完整的JavaScript 参考文档。 标准对象 了解Array、Boolean、Date、Error、Function、JSON、Math、Number、Object、RegExp、String、Map、Set、WeakMap、WeakSet等标准内置对象。
了解更多并加入 MDN Web Docs 社区。 函数 上一页 下一页 函数是 JavaScript 中的基本组件之一。JavaScript 中的函数类似于过程——一组执行任务或计算值的语句。但要成为函数,这个过程应该接受输入并返回与输入存在某些明显关系的输出。要使用一个函数,你必须将其定义在你希望调用它的作用域内。 参见JavaScript ...
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MDN Web Docsis an open-source, collaborative project that documents web platform technologies, including CSS, HTML, JavaScript, and Web APIs. We also provide extensive 🧑🎓 learning resources for beginning developers and students. Note:By participating in and contributing to our projects and d...
MDN Web Docsis an open-source, collaborative project that documents web platform technologies, including CSS, HTML, JavaScript, and Web APIs. We also provide extensive 🧑🎓 learning resources for beginning developers and students. Note:By participating in and contributing to our projects and ...
a day ago Web/API/WebGL_API/Tutorial/Using_textures_in_WebGL を更新mdn/translated-content a day ago 2025/02/05 時点の英語版に同期mdn/translated-content a day ago fix(AuthenticatorAttestationResponse): quote BLE transport constantmdn/content ...
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DOCTYPE html>. See also Definition of the DOCTYPE in the HTML specification Quirks Mode and Standards Mode Document.doctype, a JavaScript method that returns the doctype Ad
HTML #event-beforeunload HTML #handler-window-onbeforeunload See also BeforeUnloadEventinterface Related events: DOMContentLoaded readystatechange load unload Page Lifecycle APIprovides more useful guidance on handling page lifecycle behavior in your web apps. ...