Those are examples of higher-order functions that accept functions as arguments, but plenty of them return functions as well. If you’ve ever seen a function call that has two sets of parentheses ...

[In case you don't know, in ECMAScript/JavaScript, variables declared with var have global or function-level scope, and variables declared with let have block-level scope.] Lately all the code ...

Let’s begin by looking at an HTML form and some vanilla JavaScript to go with it, as shown in Listing 1. You can also see this example running in a live fiddle . Listing 1.

Nowadays, we have the proposal which enable decorators on Class and Object, but it don't support on Function due to the probably difficult when implement this feature, especially for the exist of ...

Interestingly, any variables, functions, Arrays, etc. that are defined inside of the function expression's body can't be seen outside of the IIFE. To see this, check the value of baseNumber in the ...