Promises, handlers, and chains are foundations of modern JavaScript, but they can be tricky. Here are four common traps to ...

But how can you use HTML to call a JavaScript function, and why would you want to do that? In this article, you will learn how to use different HTML elements and attributes to trigger JavaScript ...

A callback function is a function that is passed as an argument to another function and is called by that function at some point. The callback function can be defined as a regular function, an ...

Functional programming, as the name implies, is about functions. While functions are part of just about every programming paradigm, including JavaScript, a functional programmer has unique ...

Of all the hats JavaScript can wear, its form-processing features are among the most sought and used. Learn how to use JavaScript for form processing, validation, and more. Forms are an essential ...

Review declaring a function using a function expression Declare a function using arrow syntax Describe situations where arrow functions are used Evaluate the expression function() { return 'bar' }, ...

Strings are objects within the JavaScript language. They are not stored as character arrays, so built-in functions must be used to manipulate their values. The functions provide various ways to ...