June 2021
Intermediate to advanced
398 pages
9h 35m
English
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Observing and Responding to DOM Changes
If we want to use the DOM as a place to hold on to the state of the client-side system, it’s helpful to be able to know when that state changes. In a Hotwire system, where new HTML text might be added to the DOM as a result of a form submission or an ActionCable text receipt, being able to detect that HTML change and perform an action based on it allows for a lot of cool behavior, even while keeping the drawing logic on the server side.
We can do this by using the MutationObserver API, which is a standard part of every recent browser. Stimulus itself is powered by MutationObserver calls, so any browser that can run Stimulus can manage MutationObservers. Browsers that are older than, say, Internet Explorer ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.