September 2020
Beginner to intermediate
456 pages
11h 4m
English
Content preview from Svelte and Sapper in Action
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4 Block structures
This chapter covers
- Conditional logic in HTML with
#if - Iteration in HTML with
#each - Waiting on promises in HTML with
#await
There are three common approaches to adding conditional and iteration logic in the markup of various web frameworks. React uses JSX ( JavaScript XML) where logic is implemented by JavaScript code in curly braces (https://reactjs.org/docs/ introducing-jsx.html). Angular and Vue support framework-specific attributes for logic. For example, Angular supports ngIf and ngFor, while Vue supports v-if and v-for. Svelte supports a Mustache-like (https://mustache.github.io/) custom syntax that wraps HTML and the components to render.
There are only three kinds of block structures in Svelte:
-
ifis used to specify ...
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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.
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