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 函数的详细参考章节,以了解详情。 定义函数 函数声明 一个函数定义(
搜索:如果您知道您要查找的具体内容或问题,可以在MDN的搜索框中输入关键词进行搜索。例如,如果您想学习更多关于JavaScript中的Array的方法,您可以搜索“JavaScript Array methods”。 导航菜单:在MDN的主页上,您可以看到一个详细的导航菜单,根据不同的主题(如HTML、CSS、JavaScript等)组织内容。您可以点击这些主题来查看...
闭包是由捆绑起来(封闭的)的函数和函数周围状态(词法环境)的引用组合而成。换言之,闭包让函数能访问它的外部作用域。在 JavaScript 中,闭包会随着函数的创建而同时创建。
Learn about the Document interface, including its constructor, properties, and methods, specifications and browser compatibility.
$ mdn array#Methods Opens theArraydocumentation on MDN in your browser and jumps down to theMethodssection. Compatability mdnusesopenwhich tries to find a suitable command for opening URLs in your browser, regardless of which platform you're on. If you're having problems usingmdnon your platfo...
eval: The Object.eval() method used to evaluate a string of JavaScript code in the context of an object, however, this method has been removed. every: The every() method tests whether all elements in the array pass the test implemented by the provided function. every: The every() met...
Uint32Array.length 长度属性,它的值是3。 Uint32Array.name 返回字符串类型的值,表示构造器的名字。Uint32Array的返回值是: "Uint32Array"。 Uint32Array.prototype 返回TypedArray对象的原型链。 Methods Uint32Array.from() 参考Array.from()。 未完成,请参考bug 896608。
Learn about the HTMLCollection interface, including its properties and methods, specifications and browser compatibility.
Learn about the CSSRuleList interface, including its properties and methods, code examples, specifications, and browser compatibility.
我们曾经说过,现在我们重申一遍—在javascript中,一切东西都可以被当做对象。 When you create a string, your variable becomes a string object instance, and as a result has a large number ofproperties(即.XXX)andmethods(即.XXX())available to it. ...