If you run this code it will have exactly the same effect as the previousinit()example: the string "Mozilla" will be displayed in a JavaScript alert box. What's different — and interesting — is that thedisplayName()inner function was returned from the outer function before being executed....
JavaScript 1.7 and older: function(x) { return x * x; } JavaScript 1.8: function(x) x * x This syntax allows you to leave off the braces and 'return' statement - making them implicit. There is no added benefit to writing code in this manner, other than having it be syntactically sh...
l = arguments.length; i < l; i++) {7a = a *arguments[i];8}910returna;11};1213returnfunction() {14varargs = Array.prototype.join.call(arguments, ',');15if(argsincache) {16returncache[args];17}1819returncache
files/en-us/web/javascript/guide/functions/index.md Outdated @@ -516,6 +516,8 @@ const getCode = (function () { console.log(getCode()); // "0]Eal(eh&2" ``` In the code above, a concept called [IIFE](/en-US/docs/Glossary/IIFE) (Immediately Invoked Function Expression) ...
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I'm in here! Wait. What Happened? (Via MDN)… normally, the local variables within a function only exist for the duration of that function's execution once the outer functiongimmeFunctionfinishes executing, you'd expect that its local variable,a, would no longer be accessible ...
In this article, we will try to demystify said concepts and provide a simple guide to JavaScript Closures. What is a Closure? First let's take a look at the official MDN definition of closure: A closure is the combination of a function bundled together (enclosed) with references to its su...
JavaScript 1.8: function(x) x * x 该语法支持省略花括号和'return'语句。使用这种编码的目的只是为了在句法上使得代码更加简化,但除此之外没有其他好处。 Examples 例子 一种绑定事件监听器的便捷方式: document.addEventListener("click", function() false, true); ...