March 2019
Intermediate to advanced
208 pages
5h 11m
English
Content preview from Web Development with ReasonML
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Getting a Value
getElementById gives us a value of type option(Webapi.Dom.Element.t), where the t stands for “type.” This is a generic element. It is the “parent” of more specific types of elements such as HTML elements or SVG elements, and its interface doesn’t include any functions for obtaining an element’s value attribute. The interface for HTML elements does have such a function. Since we are dealing with an HTML element, we’ll use unsafeAsHtmlElement to tell ReasonML to treat this element as an HTML element.
Why is it Called Unsafe? | |
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The function name unsafeAsHtmlElement contains unsafe because it calls JavaScript directly and will work ... |
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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.