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Friday, 7 May, 2021 UTC
javascript: Create and Dispatch Synthetic Events
In addition to the browser creating events, it is also possible for you to create and dispatch your own events. ... moreFriday, 7 May, 2021 UTC
javascript: Stop Events
Two separate `event` object methods exist for stopping an event: `event.stopPropagation()` and `event.stopImmediatePropagation()`. This lesson will explain the differences between these two functions as well as cautioning you about some dangers in stopping ... moreFriday, 7 May, 2021 UTC
javascript: The Execution Order of Event Listeners in the Target Phase
This lesson explores some of the strangeness of the target phase, including the execution of capture and bubble phase event listeners added to the event target. ... moreFriday, 7 May, 2021 UTC
javascript: Choose an Event Listener Mechanism
Sometimes you need to use `addEventListener` to listener to particular events as there are no corresponding HTML attribute or object property event handlers for the event. ... moreFriday, 7 May, 2021 UTC
javascript: The Event Object
Event listeners are provided with an `event` object that represents an actively dispatched event. An `event` object contains lots of information and functionality related to an event. We will look at the various event properties, constants and methods ... moreFriday, 7 May, 2021 UTC
javascript: Cancel Events
In this lesson, we will look at what it means to cancel an event, why you might want to cancel an event, and how you can cancel an event. ... moreFriday, 7 May, 2021 UTC
javascript: Log Events to the Console
It is common to log `event` objects to the `console`. However, it is important to keep in mind that object properties are evaluated in objects logged to the `console` when the object is first expanded. ... moreFriday, 7 May, 2021 UTC
javascript: Remove an Event Listener with removeEventListener
`removeEventListener` removes an event listener added with `addEventListener`. However, there are a number of gotchas to watch out for in order to correctly remove an event listener. ... moreFriday, 7 May, 2021 UTC
javascript: The Execution Order of Event Listeners
It is possible to add many event listeners using different binding approaches to an `EventTarget`. In this lesson, I explain in what order event listeners will be executed in. ... moreFriday, 7 May, 2021 UTC
javascript: Understand the Relationship Between HTML Attribute and Object Property Event Handlers
Using HTML attributes event handlers and object property event handlers are related ways of expressing a single event listener binding to an element. This lesson explores the dynamics and often strangeness of that relationship. ... moreFriday, 7 May, 2021 UTC
javascript: Add an Event Listener with addEventListener
In this lesson, we explore how you can add event listeners to an event target with `addEventListener`. It will also explain how you can control aspects of your event listener binding; as well as event listener equality. ... moreFriday, 7 May, 2021 UTC
javascript: Listen to Events using Object Property Event Handlers
You can listen and respond to events on an element from within JavaScript using the object property event handlers. This lesson explores how you can add, use and remove event handlers to an element. ... moreFriday, 7 May, 2021 UTC
javascript: Listen to Events using HTML Attribute Event Handlers
It is possible for code authored in HTML attributes to be executed when a matching event is called. This lesson goes over the nuances of adding, using and removing event handlers using HTML attributes. ... moreFriday, 7 May, 2021 UTC
javascript: High-Level DOM Events Concepts
Explaining what an `event` is, how they are dispatched to `EventTargets`, and you can respond to those events by adding **event listeners**. This lesson also covers how events move through `EventTarget`'s that participate in a tree (such as elements in ... moreFriday, 7 May, 2021 UTC
javascript: Introduction to the DOM Events Course
This is a light introduction to the DOM events problem space and overview of the major topics that we will be covering. I will also introduce people to https://domevents.dev ... moreFriday, 7 May, 2021 UTC
javascript: Improve Scroll Performance with Passive Event Listeners
Some browsers treat some events added to the `body` as passive by default. However, HTML attribute event handlers on the `body` do not share these default passive values. ... moreFriday, 7 May, 2021 UTC
javascript: Debug Event Listener Performance with Chrome Developer Tools
In this lesson, we will use the Chrome performance panel to debug and fix an interaction that feels sluggish. ... moreFriday, 7 May, 2021 UTC
javascript: Debug and Inspect Event Listeners with Chrome Developer Tools
In this lesson we we will look at how you can inspect and debug event listeners in your browser by using the browser developer tools. ... moreFriday, 7 May, 2021 UTC
javascript: Synchronous and Asynchronous Events (Ordered and Unordered Events)
Events are classified as either synchronous or asynchronous (ordered or unordered). This lesson will explore what these categorisations really mean and what it means to you. ... moreFriday, 7 May, 2021 UTC
javascript: Window Reflecting Body Element Event Handlers
Some event handlers attached to the `` act as if they were attached to the `window`. ... moreFriday, 7 May, 2021 UTC
javascript: Default Passive Values on the Body Element
Some browsers treat some events added to the `body` as passive by default. However, HTML attribute event handlers on the `body` do not share these default passive values. ... moreWednesday, 5 May, 2021 UTC
css: Use Chrome Devtools' CSS Overview to debug the CSS Design of a website
Chrome Devtools can be really powerful, when it comes to debug JavaScript, inspect DOM nodes and their properties as well as CSS styling. in this lesson we're quickly having a look at the "CSS Overview" feature of Chrome Devtools, that allows ... moreTuesday, 27 April, 2021 UTC
typescript: Create Private Class Fields Using TypeScript's private Modifier
In this lesson, we're going over how to create private class fields using TypeScript's `private` modifier. However, as we're going to see, the `private` modifier doesn't give us any actual protection at runtime; it only exists in TypeScript's type system ... moreTuesday, 27 April, 2021 UTC
typescript: Implement a NonNullish<T> Conditional Type in TypeScript
In this lesson, we're going to learn about conditional types, a powerful feature of TypeScript's type system. Conditional types let us express non-uniform type mappings, that is, type transformations that differ depending on a condition. A conditional ... moreTuesday, 27 April, 2021 UTC
typescript: Create Truly Private Class Fields Using the #fieldName Syntax
This lesson introduces private class fields which (unlike regular class fields) cannot be examined or modified outside of the class they're defined in. We're going to contrast private class fields with TypeScript's `private` modifier and public class ... moreTuesday, 27 April, 2021 UTC
typescript: Encapsulate Truly Private Variables in a Closure
Closures are an alternative to truly private class fields. If you need to encapsulate a private variable so that it can only be accessed in a controlled way, you can use a closure. This technique is particularly useful when your code has to run in older ... moreTuesday, 27 April, 2021 UTC
typescript: Statically Type String Literals with Template Literal Types in TypeScript
In this lesson, we're going to explore template literal types, another powerful feature of TypeScript's type system. Template literal types have the same syntax as template literals in JavaScript, but they're used in type positions. Using template literal ... moreTuesday, 27 April, 2021 UTC
typescript: Use TypeScript's Mapped Types and Template Literal Types Together
In this final lesson, we're going to dive deep into a more complex example in which we combine mapped types, key remapping, template literal types, and indexed access types to statically type a highly dynamic JavaScript function in TypeScript. ... moreTuesday, 27 April, 2021 UTC
typescript: Use the Nullish Coalescing Operator in TypeScript
This lesson introduces the `??` operator which is known as [nullish coalescing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing_operator). The `??` operator produces the value on the right-hand side if (and ... moreTuesday, 27 April, 2021 UTC
