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JavaScript(JS)是一种具有函数优先特性的轻量级、解释型或者说即时编译型的编程语言。虽然作为 Web 页面中的脚本语言被人所熟知,但是它也被用到了很多非浏览器环境中,例如 Node.js、Apache CouchDB、Adobe Acrobat 等。进一步说,JavaScript 是一种基于原型、多范式、单
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Learn more See full compatibility Report feedback 与其他语言相比,函数的 this 关键字在JavaScript 中的表现略有不同,此外,在严格模式和非严格模式之间也会有一些差别。 在绝大多数情况下,函数的调用方式决定了 this 的值(运行时绑定)。this 不能在执行期间被赋值,并且在每次函数被调用时 this 的值也可能会不...
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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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mozilla:https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/date w3c:https://www.w3.org/TR/html-markup/input.date.html w3school英文版(国内的.cn就是仿这个网站的):http://www.w3schools.com/html/html_form_input_types.asp ...