How to vue 3 vs. svelte for svg icon components: a practical comparison
- Step 1Compare the wrapper boilerplate — Vue wraps the SVG in
<template>and adds a separate<script setup>withdefineProps. Svelte puts a<script>block first withexport letprops, then the SVG as bare markup. Vue's shell is a few lines longer; Svelte's is terser but usesclassNameinstead ofclass. - Step 2Compare the class/styling prop — Vue declares
class?and Vue's attribute fallthrough automatically applies a passedclassto the single root<svg>— so it works without binding. Svelte can't name a propclass(reserved), so the tool emitsclassNamewhich you must bind in the markup (class={className}) for it to do anything. - Step 3Compare the manual wiring effort — Both outputs leave
size/colorunbound. In Vue you add:width="size" :stroke="color"; in Svelte you addwidth={size} stroke={color}. The effort is equivalent — a one-line edit per attribute in either framework. - Step 4Compare runtime weight — Svelte components compile to near-vanilla JS; Vue components rely on the Vue runtime your app already ships. For an icon set, the per-component delta is small relative to the runtime you load once. Pick on app fit, not icon bytes.
- Step 5Compare TypeScript ergonomics — With TS on, Vue uses
defineProps<{...}>()(type-only); Svelte types eachexport let. Both give you autocomplete onsize/color. Neither exports a reusablePropstype — declare one yourself if your design system needs it. - Step 6Pick the framework you already ship — If your app is Vue/Nuxt, generate Vue; if it's Svelte/SvelteKit, generate Svelte. Generating the non-native format means pulling in a second framework runtime just for icons — rarely worth it. Generate per-target instead.
Vue 3 vs Svelte: the actual generated shape
Drawn from the converter's real output for the same input SVG. Both declare three props; neither binds size/color to the markup.
| Aspect | Vue 3 | Svelte |
|---|---|---|
| File extension | .vue | .svelte |
| Markup container | <template> element | Bare markup after the script |
| Props mechanism | defineProps in <script setup> | export let in <script> |
| Styling prop name | class (matches HTML) | className (class is reserved in Svelte script) |
| Class auto-applies to root? | Yes — Vue attribute fallthrough | No — must bind class={className} yourself |
| size / color bound? | No — declared only | No — declared only |
| Style block emitted | None | None |
Runtime and DX trade-offs for an icon library
General framework characteristics, scoped to the icon-component use case. Bundle figures are order-of-magnitude, not benchmarks.
| Concern | Vue 3 | Svelte | Practical takeaway |
|---|---|---|---|
| Framework runtime | Shipped once (you already load it in a Vue app) | Minimal — compiles close to vanilla | Matters for a standalone icon package; negligible inside an existing app |
| Per-icon overhead | Vue render function + props | Compiled update code | Tiny either way; not a deciding factor at typical icon counts |
| Theming via CSS vars | fill="var(--icon)" + toggle var | fill="var(--icon)" + toggle var | Identical — CSS custom properties are framework-agnostic |
| Prop wiring effort | :width/:stroke bindings | width={...}/stroke={...} bindings | Equivalent one-liners; this tool does neither for you |
| SSR / hydration | Nuxt 3 inlines SVG server-side | SvelteKit inlines SVG server-side | Both avoid flash-of-missing-icon vs external files |
Cookbook
The same icon through both targets, then the theming pattern that works identically in each.
Same SVG, both outputs side by side
Identical input, framework: vue vs framework: svelte, TypeScript on. The structural difference is the wrapper and the styling-prop name.
Vue (icon.vue):
<!-- Generated component: icon -->
<template>
<svg viewBox="0 0 24 24" fill="#000">...</svg>
</template>
<script lang="ts" setup>
defineProps<{ size?: number | string; color?: string; class?: string }>()
</script>
Svelte (icon.svelte):
<!-- Generated component: icon -->
<script lang="ts">
export let size: number | string = 24;
export let color: string = 'currentColor';
export let className: string = '';
</script>
<svg viewBox="0 0 24 24" fill="#000">...</svg>The class prop: Vue is automatic, Svelte is manual
This is the single biggest day-to-day difference. Vue forwards a class for free; Svelte needs you to bind it.
Vue — works out of the box (fallthrough):
<Icon class="text-blue-500 h-6" /> -> lands on root <svg>
Svelte — the generated className is unwired:
<Icon className="text-blue-500 h-6" /> -> does NOTHING yet
Fix: edit the markup to bind it:
<svg class={className} viewBox="0 0 24 24">...</svg>Theming via CSS variables (identical in both)
The most portable way to recolour icons skips the unbound color prop entirely and uses currentColor + a CSS variable — works the same in Vue and Svelte.
1. Convert colours to currentColor first:
/svg-tools/svg-to-tailwind (currentColor mode)
2. In your theme CSS:
:root { --icon: #111 }
.dark { --icon: #eee }
3. On the icon (either framework):
<svg style="color: var(--icon)" fill="currentColor">
Both Vue and Svelte render this identically; dark mode
flips the variable, no per-component prop needed.Wiring size/color: equivalent effort
Both frameworks need the same manual edit to make the declared props live — proof the converter's omission is framework-neutral.
Vue: <svg :width="size" :height="size" :stroke="color">
Svelte: <svg width={size} height={size} stroke={color}>
One attribute, one binding, per framework. Choose on app
fit, not on how hard this step is.Generate both targets from one source set
If you must ship icons to both a Vue and a Svelte app, generate each format separately from the same SVGs rather than trying to share one file. The shapes are not interchangeable.
Per icon, run the converter twice: framework=vue -> packages/icons-vue/src/Icon.vue framework=svelte -> packages/icons-svelte/src/Icon.svelte Clean the SVG once up front so both outputs stay in sync: /svg-tools/svg-pro-minifier -> shared clean source
Edge cases and what actually happens
Expecting one component to work in both frameworks
Not portableA .vue SFC and a .svelte file are different formats — neither runs in the other framework's compiler. There is no universal output. For dual-framework shipping, generate both formats from the same SVG source and publish them as separate packages.
Passing class to a Svelte icon and seeing nothing
Manual wiringSvelte's generated prop is className, and the tool does not bind it to the SVG. <Icon className="..."> is a no-op until you add class={className} to the markup. This differs from Vue, where class fallthrough applies automatically. It is the most common cross-framework surprise.
Choosing Svelte purely to save bytes per icon
MarginalSvelte's smaller per-component footprint is real but tiny relative to the rest of your app. For an icon set inside an existing Vue or Svelte app, the framework runtime is already loaded; pick the format your app uses. The byte argument only matters for a standalone, framework-agnostic icon package — where web components beat both.
Wanting Options API in Vue
Not generatedThe converter only emits <script setup> (Composition API). There is no Options-API output. If a legacy codebase requires Options API, convert the generated SFC manually, or wrap the SVG in your own Options-API component and paste the markup in.
Relying on color for theming
By design unboundThe color prop is declared but not bound, in both frameworks. Theming via the prop requires manual binding; theming via CSS custom properties (currentColor + a var) needs no prop at all and is identical across Vue and Svelte. Prefer the CSS-variable route for design systems.
Comments / licence banners in the SVG
Stripped (both)Comment removal happens before the framework-specific wrapping, so it's identical for Vue and Svelte: any <!-- --> inside your SVG is gone. Keep licences in a package-level file, not inline in the icon.
SSR behaviour differences
EquivalentBoth Nuxt 3 and SvelteKit inline the SVG markup during server rendering, so neither suffers the flash-of-missing-icon that external <img src> SVGs can cause. There's no SSR advantage to either framework for inlined icons.
TypeScript Props type sharing
Not exported (both)Neither output exports a reusable Props type — Vue inlines defineProps<{...}>(), Svelte types each export let. If your design system standardises a shared icon Props interface, declare it once yourself and reference it in each generated file.
Frequently asked questions
Which framework produces smaller SVG component bundles?
Svelte components compile to near-vanilla JS with no per-component framework runtime, while Vue components run on the Vue runtime your app already loads. For a standalone icon-only package, Svelte has a real edge; inside an existing Vue app, the difference is negligible because the runtime is loaded once regardless.
What's the biggest practical difference in the generated code?
The styling prop. Vue emits class and Vue's attribute fallthrough applies it to the root <svg> automatically. Svelte can't name a prop class (reserved word), so the tool emits className — and because the tool doesn't bind it, className does nothing until you add class={className} to the markup yourself.
Does either framework wire up the size and color props for me?
No — neither does. The converter declares size, color, and the class prop in both Vue and Svelte but leaves your SVG's literal width/height/fill/stroke untouched. Making the props reactive is a one-line-per-attribute manual edit in either framework, and the effort is the same.
How does dark mode work with SVG components in each framework?
Identically. Set fill="currentColor" (use SVG to Tailwind to convert hard-coded colours), drive color with a CSS custom property, and flip the variable in your theme. CSS variables are framework-agnostic, so the dark-mode pattern is the same in Vue and Svelte and needs no prop binding.
Can I use the same SVG components in both a Vue app and a Svelte app?
Not the same files — .vue and .svelte are different formats. Generate each separately from the same SVG source (convert twice, once per framework) and publish two packages. Clean the SVG once up front so both outputs stay consistent.
Do Vue/Svelte SVG components work with SSR?
Yes, equally. Nuxt 3 and SvelteKit both inline the SVG markup on the server, so the icon is present in the initial HTML — no flash of a missing icon, unlike external SVG references.
Is Vue's attribute fallthrough reliable for classes?
Yes, for these single-root icons. The SVG is the component's only root element, so a class passed by the consumer merges onto it via Vue's standard fallthrough rules, combining with any literal class already on the <svg>. Svelte has no equivalent automatic forwarding here, which is why its className needs explicit binding.
Which should I pick for a brand-new icon system in 2026?
The one your app already uses. The generated shapes are equivalent in capability, the per-icon performance gap is small, and both need the same manual prop wiring. Matching your app's framework avoids loading a second runtime and keeps tooling (lint, types, HMR) consistent.
Do I lose any SVG features choosing one over the other?
No. Both wrap the markup verbatim (minus comments), so filters, gradients, masks, and clip paths survive identically. The differences are purely in the component shell, not in what SVG features are preserved.
What about a framework-agnostic option?
This tool only targets Vue and Svelte. For React, use SVG to JSX. For truly framework-free icons, generate web components (custom elements) from the SVG source — out of scope for this converter, but the right call when you genuinely need one icon set across multiple frameworks.
Is the TypeScript experience different between the two?
Slightly. Vue uses a type-only defineProps<{...}>() generic; Svelte types each export let. Both give you autocomplete on the props in editors. Neither exports a reusable Props type, so if you want one, declare it yourself.
Are my icons uploaded when I generate them?
No. The conversion runs in your browser for both frameworks. If you automate generation through the API, it executes on your own machine via the paired @jadapps/runner — the JAD endpoint never receives the file content.
Privacy first
Every JAD SVG tool runs entirely in your browser using the DOM API and Canvas. Your SVG files never leave your device — verified by zero outbound network requests during processing.