svelte | Cybernetically enhanced web apps | Frontend Framework library

 by   sveltejs TypeScript Version: 5.0.0-next.16 License: MIT

kandi X-RAY | svelte Summary

kandi X-RAY | svelte Summary

svelte is a TypeScript library typically used in User Interface, Frontend Framework applications. svelte has no bugs, it has a Permissive License and it has medium support. However svelte has 1 vulnerabilities. You can download it from GitHub.

Svelte is a new way to build web applications. It's a compiler that takes your declarative components and converts them into efficient JavaScript that surgically updates the DOM. Learn more at the Svelte website, or stop by the Discord chatroom.

            kandi-support Support

              svelte has a medium active ecosystem.
              It has 68443 star(s) with 3348 fork(s). There are 870 watchers for this library.
              There were 10 major release(s) in the last 6 months.
              There are 785 open issues and 4268 have been closed. On average issues are closed in 143 days. There are 67 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of svelte is 5.0.0-next.16

            kandi-Quality Quality

              svelte has 0 bugs and 0 code smells.

            kandi-Security Security

              svelte has 1 vulnerability issues reported (0 critical, 1 high, 0 medium, 0 low).
              svelte code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              svelte is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              svelte releases are available to install and integrate.
              Installation instructions are not available. Examples and code snippets are available.
              svelte saves you 250 person hours of effort in developing the same functionality from scratch.
              It has 612 lines of code, 0 functions and 1918 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of svelte
            Get all kandi verified functions for this library.

            svelte Key Features

            No Key Features are available at this moment for svelte.

            svelte Examples and Code Snippets

            svelte - images
            JavaScriptdot img1Lines of Code : 98dot img1License : Permissive (MIT License)
            copy iconCopy
            const BY = {
            	name: 'CC BY 2.0',
            	url: ''
            const BY_SA = {
            	name: 'CC BY-SA 2.0',
            	url: ''
            const BY_ND = {
            	name: 'CC BY-ND 2.0',
            	url: 'https://creativ  
            svelte - data-site-content-12 svg-04 scatterplot
            JavaScriptdot img2Lines of Code : 54dot img2License : Permissive (MIT License)
            copy iconCopy
            export default {
            	a: [
            		{ x: 10, y: 8.04 },
            		{ x: 8, y: 6.95 },
            		{ x: 13, y: 7.58 },
            		{ x: 9, y: 8.81 },
            		{ x: 11, y: 8.33 },
            		{ x: 14, y: 9.96 },
            		{ x: 6, y: 7.24 },
            		{ x: 4, y: 4.26 },
            		{ x: 12, y: 10.84 },
            		{ x: 7, y: 4.82 },
            		{ x: 5, y  
            svelte - data
            JavaScriptdot img3Lines of Code : 45dot img3License : Permissive (MIT License)
            copy iconCopy
            export default [
            	{ x: 1979, y: 7.19 },
            	{ x: 1980, y: 7.83 },
            	{ x: 1981, y: 7.24 },
            	{ x: 1982, y: 7.44 },
            	{ x: 1983, y: 7.51 },
            	{ x: 1984, y: 7.10 },
            	{ x: 1985, y: 6.91 },
            	{ x: 1986, y: 7.53 },
            	{ x: 1987, y: 7.47 },
            	{ x: 1988, y: 7.48 },
            Initializing a custom Svelte store asynchronously
            JavaScriptdot img4Lines of Code : 91dot img4License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            {#if appInitialized}
                'showing App'
                'initializing App'
            {#await settings.init()}
                'initializing store'
                'show App'
            {:catch error}
                'Couldn't initialize - '{error.message}
            svelte: how can I declare two cyclically reactive variables?
            JavaScriptdot img5Lines of Code : 34dot img5License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
                a: {a}
                b: {b}
            a b
            How can I close my dropdown menu when sveltekit route changes?
            JavaScriptdot img6Lines of Code : 23dot img6License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
                  display = "none";
                  setTimeout(() => (display = ""), 0);
            Fabric.js / fabricjs in Svelte, is there any workaround?
            JavaScriptdot img7Lines of Code : 30dot img7License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            copy iconCopy
            localstorage.setItem('comments', JSON.stringify(arr_of_cmnts);
            //In svelte
            let arr_of_cmnts = [];
            export const comments = writable(localStorage.getItem('comments')|| JSON.stringify(arr_of_cmnts));
            //js **normally**
            Is there a way to gradually migrate to Svelte?
            JavaScriptdot img9Lines of Code : 17dot img9License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            # svelte/public/index.html
            # Svelte main.js
            import Chat from './Chat.svelte';
            new Chat({
                target: document.querySelector('#chat'),
            How can I correctly pre-select a multiple select input in Svelte with objects?
            JavaScriptdot img10Lines of Code : 60dot img10License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
              {#each availableValues as value}
            // App.svelte
              {#each selectedValues as sv (}
            • {} [id: {}]
            • {/each}

            Community Discussions


            Why are Vue DOM changes so slow?
            Asked 2022-Apr-15 at 11:50

            I have a list of 2000 input checkboxes. When selecting them all at once there is noticeable delay (and browser freeze) of about 2 seconds. This seems to be the case for Vue and React, but not for Svelte or jQuery or vanilla.

            With 5k+ checkboxes it becomes a very annoying 3-5 seconds blocker...

            Why is the re-rendering taking so long?

            How can I overcome this update delay with Vue.js?

            (The solutions of paginate or lazy-load are not really solving the problem; they are avoiding it.)

            Below is the code in Vue followed by the same example in Svelte.



            Answered 2022-Apr-15 at 09:59

            1. The reason of slowly changes



            How do I build a docker image from a Sveltekit app
            Asked 2022-Mar-31 at 19:20

            I am trying to build a docker image from a sample app I have created in Sveltekit.

            I am using the @sveltejs/adapter-auto and have included both .js files for API calls and .svelte files in my routes folder.

            Here is my Dockerfile (which builds fine, but might not be correct)



            Answered 2022-Mar-31 at 19:20

            You should include your package.json in your final Docker image.

            Edit: Also I'm not sure you should use .svelte-kit/build since this is an intermediate result used by sveltekit internally. You should have a build folder after running build task but I'm not sure cause I never used auto adapter, I usually use node adapter.

            Mine basically looks like this:



            Excluding unused Svelte components from any given request's bundle
            Asked 2022-Mar-21 at 14:40

            The following question is specific to SvelteKit.

            I have a page that could potentially render a subset of various components based upon what the server determines from the request. But since the server is already going to determine what should/should not be displayed, I don't want to include any of the other components in the final bundle shipped to the client since the client will never need that code for that specific request.

            To illustrate, in the example code below, if there is no error, I don't want the code for ErrorToast included in the bundle.



            Answered 2022-Mar-21 at 14:40

            From Rich Harris via Twitter:

            your bundler can't know that won't be used, because it can't know that error won't change at runtime. closest you can get is this sort of thing:



            How to configure Svelte project with Vite so that the static files are not copied during the build?
            Asked 2022-Mar-08 at 08:07

            In a NORMAL Svelte project (no SvelteKit) the static files are in the public directory and when running npm run build (rollup -c) the src folder is compiled into public/build and the public folder can then be hosted somewhere.

            I now switched (an already existing) Svelte project to Vite and the static files are still under public but when running npm run build (vite build), everything is bundled into the dist directory. So all the files in the public directory are actually copied and exist twice in the project. Which means when changing or adding something (which doesn't effect the app logic) the project needs to be rebuild before it can be redeployed.

            Can this be changed via the configuration, that either all compiled files are added again to the public directory or that the static files reside directly inside dist and nothing is copied during the build process?

            Edit: The project should still be able to be run in dev mode npm run dev (vite) with the assets being served



            Answered 2022-Mar-08 at 08:07

            Yes you can keep public files in dist without copying, but it's a little "hacking".

            First you need to disable publicDir option to disable copying.

            Then disable emptyOutdir to reserve files.

            Finally you may want to clean old assets, so a buildStart hook is added, cleaning dist/assets when build starts.

            The final vite.config.js (you may want to add some error handling):



            Web components with vaadin and rollup with svelte: Primary button ignores theme attribute
            Asked 2022-Feb-22 at 21:35

            Maybe someone tried this before and is able to give me a hint. I have used normal svelte setup (mentioned in the main page) which scaffolds the app;

            npx degit sveltejs/template my-svelte-project

            I wanted to use vaadin web components in Svelte. I've installed it;

            npm install @vaadin/vaadin

            the code of main.ts:



            Answered 2022-Feb-22 at 13:27

            You seem to be importing the Material theme version of the Button component. The "primary" theme variant is only available if you use the default Lumo theme. To import that, use import '@vaadin/button';

            For the Material theme, you can use the "outlined" and "contained" theme variants instead:



            Can't go into object defined by rollup plugin-replace
            Asked 2022-Feb-09 at 16:22

            In a Svelte component, I'm trying to access an object I set up in my rollup config file. My rollup.config.js file looks like this:



            Answered 2022-Jan-07 at 17:12

            Good question! The object foo remains undefined so it is throwing the right error, and is unable to find foo to replace with whatever you are going to replace it with.

            The solution is having the replace plugin do its job. You may access your variable like this in your js or your .svelte files



            How to change Tailwind CSS background color with Svelte, based on a value unpacked in #each?
            Asked 2022-Feb-08 at 13:51

            I am a beginner in both Svelte and Tailwind and want to avoid an XY-Problem, so here is my goal:

            I generate rows of a table with an #each loop in Svelte. (6 values per row). I now want to conditionally color the background of this row based on one value (the battery charge).

            My idea was to conditionally render different tags based on this value. Like this:



            Answered 2022-Feb-08 at 12:13

            I think you should change approach for that problem. You could use the class:name element directive.

            A class: directive provides a shorter way of toggling a class on an element.




            Flaky cypress test with Svelte: Button is sometimes clicked, sometimes not
            Asked 2022-Feb-07 at 22:42

            I am testing my SvelteKit site with Cypress. I sometimes experience flaky tests, similar to what has been described here: In short, Cypress sometimes finds and clicks a button before the event listeners are attached - as a result, the click goes nowhere. The proposed solution is to simply re-try clicking until the appropriate listeners have been attached. That works in my case as well. However, though I do understand why this can be an issue in the example given in the blog post (it's a large calendar modal), I find it hard to justify that this issue arises when using a simple Svelte button.

            Here is a simple example of a button that reveals some content when clicked:



            Answered 2022-Feb-07 at 10:02

            SvelteKit will by default do server side rendering (SSR), which means the complete HTML is sent to the browser, including the button. That HTML then needs to be hydrated afterwards to become interactive. This means that some code runs so that Svelte connects to the HTML that already exists. Cypress is likely "too fast" here and clicks the button before that hydration step is completed, therefore nothing happens.

            It does not happen with pure Svelte because there's no SSR involved. There's a blank index.html page initially which is completely filled by Svelte's JavaScript inside the browser, so the moment the button is visible, the event listener and everything else is already initialized by Svelte.

            Comparison by steps:

            SvelteKit with SSR:

            1. Go to page X
            2. Page X is rendered on the server
            3. Page X is sent to the browser, with the complete HTML
            4. Svelte hydrates the HTML (Race condition with Cypress' click test)
            5. Completed

            Pure Svelte or SvelteKit without SSR:

            1. Go to page X
            2. Blank page is sent to the browser
            3. Svelte constructs and initializes the HTML inside the browser (No race condition with Cypress' click test)
            4. Completed



            How do I exclude files from svelte-kit build?
            Asked 2022-Jan-29 at 02:42

            If I run npm run build with SvelteKit it seems to include all files from the src folder. Is it possible to exclude a certain file type (eg. *test.js)?

            1. Select demo app with npm init svelte@next my-app

            2. Add the following code to src/routes/todos/foo.test.js



            Answered 2022-Jan-29 at 02:42

            SvelteKit 1.0.0 supports a routes configuration that enables file exclusion from the src/routes directory. The config value is a function that receives a file path as an argument, and returns true to use the file as a route.

            For example, the following routes config excludes *.test.js files from routes:



            SvelteKit console error "window is not defined" when i import library
            Asked 2022-Jan-27 at 15:34

            I would like to import apexChart library which using "window" property, and i get error in console.



            Answered 2022-Jan-27 at 15:34

            The easiest way is to simply include apexcharts like a standalone library in your webpage like this:


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install svelte

            You can download it from GitHub.


            Svelte is an MIT-licensed open source project with its ongoing development made possible entirely by fantastic volunteers. If you'd like to support their efforts, please consider:. Funds donated via Open Collective will be used for compensating expenses related to Svelte's development such as hosting costs. If sufficient donations are received, funds may also be used to support Svelte's development more directly.
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