Travis Leithead

3. DOM Event Architecture This section is non-normative. Refer to [DOM] for a normative description of the DOM event architecture 3.1. Event dispatch and DOM event flow This section gives a brief overview of the event dispatch mechanism and describes how events propagate through the DOM tree. Applications can dispatch event objects using the method, and the event object will propagate through the DOM tree as determined by the DOM event flow. Event objects are dispatched to an event target.

March 17, 2022 Many people who are blind or low vision experience the web primarily through a screen reader: an assistive technology that reads the content of each page aloud. Screen readers depend on having image labels (alternative text or “alt text”) provided that allows them to describe visual content – like images and charts – so the user can understand the full content of the page. Alt text is critical to making the web accessible, yet it’s often overlooked.

In our previous segment, “Server to Client,” we saw how a URL is requested from a server and learned all about the many conditions and caches that help optimize delivery of the associated resource. Once the browser engine finally gets the resource, it needs to start turning it into a rendered web page. In this segment, we focus primarily on HTML resources, and how the tags of HTML are transformed into the building blocks for what will eventually be presented on screen.