CS178

Below are instructions from the original MDN Web docs tutorial for a Svelte to-do app installation. The instructions reference section 5 of the tutorial, which is what the code used is updated to, with some portions omitted due to repetition or lack of relevance. Some portions of section 6 are used for the sake of browser storage and core functionality. The tutorial at no point leads to the use of async or await statements, so I have instead labeled several #EventHandler concepts as a replacement.

Source code for Svelte Tutorials at MDN Web docs

Source code of the To-Do list app for the Svelte tutorials at [Understanding client-side JavaScript frameworks](Understanding client-side JavaScript frameworks) series at MDN Web docs.

05. Svelte advanced concepts

In the last article we added more features to our To-Do list and started to organize our app into components. In this article we will add the app's final features and further componentize our app. We will learn how to deal with reactivity issues related to updating objects and arrays. Then we will focus on some accessibility issues involving focus management. Finally, we will see how components can also expose methods and variables to access them programmatically.

You can see the complete content of this article here or at MDN web docs.

The source code to follow this article is in the 05-advanced-concepts folder, you can download it with the npx degit opensas/mdn-svelte-tutorial/05-advanced-concepts svelte-todo command. You can also play with an online version using this Svelte REPL.

Looking for a shareable component template? Go here --> sveltejs/component-template

svelte app

This is a project template for Svelte apps. It lives at https://github.com/sveltejs/template.

To create a new project based on this template using degit:

npx degit sveltejs/template svelte-app
cd svelte-app

Note that you will need to have Node.js installed.

Get started

Install the dependencies...

cd svelte-app
npm install

...then start Rollup:

npm run dev

Navigate to localhost:5000. You should see your app running. Edit a component file in src, save it, and reload the page to see your changes.

By default, the server will only respond to requests from localhost. To allow connections from other computers, edit the sirv commands in package.json to include the option --host 0.0.0.0.

Building and running in production mode

To create an optimised version of the app:

npm run build

You can run the newly built app with npm run start. This uses sirv, which is included in your package.json's dependencies so that the app will work when you deploy to platforms like Heroku.

Single-page app mode

By default, sirv will only respond to requests that match files in public. This is to maximise compatibility with static fileservers, allowing you to deploy your app anywhere.

If you're building a single-page app (SPA) with multiple routes, sirv needs to be able to respond to requests for any path. You can make it so by editing the "start" command in package.json:

"start": "sirv public --single"

Deploying to the web

With now

Install now if you haven't already:

npm install -g now

Then, from within your project folder:

cd public
now deploy --name my-project

As an alternative, use the Now desktop client and simply drag the unzipped project folder to the taskbar icon.

With surge

Install surge if you haven't already:

npm install -g surge

Then, from within your project folder:

npm run build
surge public my-project.surge.sh