var NAME = function NAME (){ };

In Javascript, one standard way to declare a function is as follows: var add = function(a,b){ return a+b; }; However, when I repeat the function name on the right side of the syntax, I get no errors either. var add = function add(a,b){ return a+b; }; What's going on in the second case? There are two uses of the function keyword in Javascript: function declarations and function expr

var NAME = function NAME(){};

在Javascript中,声明函数的一种标准方式如下所示: var add = function(a,b){ return a+b; }; 但是,当我重复语法右侧的函数名称时,我也没有得到任何错误。 var add = function add(a,b){ return a+b; }; 第二种情况发生了什么? 在Javascript中有两个用于使用关键字的function :函数声明和函数表达式。 函数声明不允许关键字左侧的任何内容,例如 function add(a,b){ return a+b; } 他们总是需要一个名字

What is the difference between these two?

This question already has an answer here: var functionName = function() {} vs function functionName() {} 32 answers Are named functions or anonymous functions preferred in JavaScript? [duplicate] 4 answers This has been answered many times in StackOverflow. It is just the way of naming. So taking up some points from the answers, I would say: Function declarations and variable declarati

这两者有什么区别?

这个问题在这里已经有了答案: var functionName = function(){} vs function functionName(){} 32个答案 在JavaScript中首选命名函数或匿名函数? [复制] 4个答案 这已经在StackOverflow中多次得到解答。 这只是命名方式。 因此,从答案中拿出一些观点,我会说: 函数声明和变量声明总是通过JavaScript解释器无形地移动(“悬挂”)到其包含范围的顶部。 显然,函数参数和语言定义的名称已经存在。 优点缺点:

Bit confused between JavaScript Hoisting and Functional Scope

If I'm not wrong var lives is functional scope, because it's inside in function sandeep(). But if I'm doing console.log(lives) outside above the function then still I am getting console result as - New Delhi why? Can any one help me. (Is it because of Hoisting? it's moved on top...) Screen shot without var define inside function Screen shot with var inside function Screen

JavaScript提升和功能范围之间的混淆

如果我没有错误var生命是功能范围,因为它在函数sandeep()中。 但是如果我在console.log(lives)之外的函数之上,那么我仍然会得到控制台的结果 - 新德里为什么? 谁能帮我。 (这是因为吊装吗?它移到顶部......) 没有var的屏幕截图定义里面的功能 使用var内部函数进行屏幕截图 屏幕截图 - 在函数调用后编写console.log现在它给出了未定义的 我得到了我的答案 - 这是我的错误,我的浏览器没有正确刷新。 感谢每

AngularJS scope bug? Different results on chrome(43) and firefox(38.0.5)

I was fiddling around with angularjs recently and I discovered something weird. Using a function to determine a date difference between dates stored in properties of an object inside ng-repeat I got different results on chrome and different on firefox PLUNKER result from firefox: http://scr.hu/28dp/17r4y (incorrect) result from chrome: http://scr.hu/28dp/uik13 (correct) Function I use t

AngularJS范围错误? 铬(43)和火狐(38.0.5)

我最近在摆弄angularjs,我发现了一些奇怪的东西。 使用函数来确定存储在ng-repeat内的对象的属性中的日期之间的日期差异,我在chrome上获得了不同的结果,而在firefox上获得了不同的结果 PLUNKER 来自Firefox的结果:http://scr.hu/28dp/17r4y(不正确) 来自chrome的结果:http://scr.hu/28dp/uik13(正确) 我用来计算时差的函数: $scope.daysDiff = function (date) { var dateobj = new Date(date);

Javascript function definition/call difference between browsers

This question already has an answer here: Javascript function cannot be found 5 answers Firefox does not hoist function declarations outside of for blocks either. ECMA standard says it's okay. The documentation you linked to is not applicable only to if blocks, but for blocks as well.

Javascript功能定义/浏览器之间的通话区别

这个问题在这里已经有了答案: Javascript功能无法找到5个答案 Firefox不会for块提供函数声明。 ECMA标准说没关系。 您链接到该文档是不是只适用于if块,但是for块为好。

new Date() works differently in Chrome and Firefox

I want to convert date string to Date by javascript, use this code: var date = new Date('2013-02-27T17:00:00'); alert(date); '2013-02-27T17:00:00' is UTC time in JSON object from server. But the result of above code is different between Firefox and Chrome: Firefox returns: Wed Feb 27 2013 17:00:00 GMT+0700 (SE Asia Standard Time) Chrome returns: Thu Feb 28 2013 00:00:00 GMT+0700

新的Date()在Chrome和Firefox中的工作方式不同

我想通过JavaScript将日期字符串转换为Date ,使用下面的代码: var date = new Date('2013-02-27T17:00:00'); alert(date); '2013-02-27T17:00:00'是来自服务器的JSON对象中的UTC时间。 但是上述代码的结果在Firefox和Chrome之间是不同的: Firefox返回: Wed Feb 27 2013 17:00:00 GMT+0700 (SE Asia Standard Time) Chrome返回: Thu Feb 28 2013 00:00:00 GMT+0700 (SE Asia Standard Time) 这是不同的一

Why are function declarations handled differently in different browsers?

Although I couldn't find a reference to this easily in google, I'm familiar with the fact that, in javascript, global function declarations get interpreted before any code is executed. In other words, this works fine: f(); function f() {} However, I've noticed that chrome and firefox have different interpretations of what a global function declaration is. In particular, chrome is

为什么函数声明在不同的浏览器中处理方式不同?

尽管我在google中无法轻松找到对此的引用,但我很熟悉这样一个事实:在JavaScript中,全局函数声明在任何代码执行之前都会被解释。 换句话说,这工作得很好: f(); function f() {} 不过,我注意到chrome和firefox对于全局函数声明有不同的解释。 特别是,chrome很高兴阅读第一遍中的if块中的函数声明,但firefox不是。 try {document.write(f);} // works in chrome catch(e) {document.write(e.message);}

Why does a module level return statement work in Node.js?

When I was answering another question I came across a Node.js module with a top-level return statement. For example: console.log("Trying to reach"); return; console.log("dead code"); This works without any errors and prints: Trying to reach in the standard output but not " dead code " - the return actually ceased execution. But according to the specification of return statements

为什么Node.js中的模块级返回语句工作?

当我回答另一个问题时,我遇到了一个带有顶级return语句的Node.js模块。 例如: console.log("Trying to reach"); return; console.log("dead code"); 这工作没有任何错误和打印: Trying to reach 在标准输出中,但不是“ dead code ” - return实际上停止执行。 但根据ECMAScript 5.1中的return语句的规范, 语义 如果ECMAScript程序包含不在FunctionBody中的返回语句,则它被认为在语法上不正确。 在上面显示的程

JSlint error 'Don't make functions within a loop.' leads to question about Javascript itself

I have some code that invokes anonymous functions within a loop, something like this pseudo example: for (i = 0; i < numCards; i = i + 1) { card = $('<div>').bind('isPopulated', function (ev) { var card = $(ev.currentTarget); .... JSLint reports the error 'Don't make functions within a loop.' I like to keep my code JSLint clean. I know I can move the a

JSlint错误'不要在循环中创建函数。' leads to question about Javascript

我有一些代码在循环内调用匿名函数,就像这个伪示例: for (i = 0; i < numCards; i = i + 1) { card = $('<div>').bind('isPopulated', function (ev) { var card = $(ev.currentTarget); .... JSLint报告错误“不要在循环中创建函数”。 我喜欢保持我的代码JSLint清洁。 我知道我可以将匿名函数移出循环,并将其作为命名函数调用。 除此之外,这是我的问题: Javascript解释器是否真的会在

pure javascript to disable all form elements inside div

Is there a way to disable all fields (textarea/textfield/option/input/checkbox/submit etc) in a form by telling only the parent div name using pure javascript and not jquery or angular? I want pure javascript because I am just getting started with JS and I find all the different permutations quite confusing. I am currently doing something like, but would like streamline this: <script ty

纯JavaScript来禁用div中的所有表单元素

有没有办法禁用所有领域(textarea /文本字段/选项/输入/复选框/提交等)在一个窗体中通过只告诉父div的名称使用纯JavaScript而不是jQuery或角? 我想纯粹的JavaScript,因为我刚刚开始使用JS,我发现所有不同的排列相当混乱。 我目前正在做类似的事情,但想简化这一点: <script type="text/javascript" charset="utf-8"> ( document.onclick = function() { var clickNoElements = [ 'juniperPresentNo'