Jun 26, 2009 · This is called lexical scoping where " functions are executed using the scope chain that was in effect when they were defined " - according to JavaScript Definition Guide. Lexical …

May 5, 2009 · In Javascript, or more specifically jQuery, for example, you can specify a callback argument to be called when an animation has finished. In PHP, the preg_replace_callback() …

Jul 30, 2015 · It is one of JavaScript's primitive types. Simply declaring a variable in Javascript, such as var example initializes it to the primitive value of undefined. That means the following …

Is hoisting actually "calling the function before it is defined"? Raising the scope of a declared name so that it will be defined for other code under that scope -- that's roughly what JavaScript …

20 Another way to navigate to the location of a function definition would be to break in debugger somewhere you can access the function and enter the functions fully qualified name in the …

while JavaScript supports console.assert(), it's just a logging method and won't interrupt current procedure if assertion failed. To bring things together and satisfy various needs, here is a tiny …

Oct 12, 2023 · UMD (Universal Module Definition) patterns for JavaScript modules that work everywhere. ... This repository formalizes the design and implementation of the Universal …

Feb 12, 2017 · What is the meaning of "...args" (three dots) in a function definition? Asked 8 years, 11 months ago Modified 3 years, 1 month ago Viewed 120k times

The nullish coalescing operator (??) in JavaScript only considers null or undefined as "nullish" values. If the left-hand side is any other value, even falsy values like "" (empty string), 0, or …

Quoting from that last one: One of VS Code's longest standing and most upvoted feature requests is to make VS Code navigate to the JavaScript implementation of functions and symbols from …