What is define([ , function ]) in JavaScript? [duplicate] Ask Question Asked 11 years, 10 months ago.

And the "define with dependencies" form of define is described as follows: If the module has dependencies, the first argument should be an array of dependency names, and the second argument should be a definition function. The function will be called to define the module once all dependencies have loaded.

The closure keeps the scope of bar() contained, returning the new function from the self-executing anonymous function sets more visible scope to foo(). The anonymous self-executing function is run exactly once, so there is only one bar() instance, and every execution of foo() will use it.

Feb 27, 2017 · If you want to emulate classes in JavaScript, you would define the "class" as a function (the function itself being the constructor) and then add methods through the prototype property.

2- Suppose we want to have a function called view. Add these lines to index.d.ts: /** * Use express res.render function to render view file inside layout file. * * @param {string} view The path of the view file, relative to view root dir. * @param {object} options The options to send to view file for ejs to use when rendering.

Dec 30, 2015 · Is there a way in Javascript to define a function and immediately call it, in a way that allows it to be reused? I know you can do one-off anonymous functions: (function(i) { var product = i * i; console.log(product); // Can't recurse here because there's no (ECMA standard) way for the // function to refer to itself }(2)); // logs 4

Apr 8, 2015 · If I have a global variable foo and I define it again in a function with var they will be separate. var foo = 123; (function(){ var foo = 987; //this foo is separate from the above foo }).call(this); If you do have a "wrapper" and you want to define a …

@Rudie: Re event.target: What you describe isn't wrong, it's correct.If you click an img inside a div and you're watching the div, event.target is the img (and this is the div).

Learn how to call a function defined inside another function in JavaScript with examples.

Oct 4, 2011 · If you have a function expression that is in string form and you want to make it a function, then you need to include a return statement in the string you pass to new Function. const strFn = "const sum = (a, b) => a + b" const newFn = new Function(`${strFn}; return sum`)(); console.log(newFn(2, 3)) // 5