Another Frontend Framework: Svelte with TypeScript

栏目: IT技术 · 发布时间: 4年前

内容简介:Recently I implementedThe solution is different from others in that it’s in language level, instead of writing tools such as preprocessor, svelte-draft itself is implemented inIn example

Recently I implemented svelte-draft , which is another way to add complete typescript support to svelte. I rewrote almost all examples in https://svelte.dev/tutorial and the result is repo svelte-draft-tutorial .

The solution is different from others in that it’s in language level, instead of writing tools such as preprocessor, svelte-draft itself is implemented in TypeDraft , which is a superset of typescript with built-in support for DSL extension, code transformation and literate programming.

Language support for reactivity

Another Frontend Framework: Svelte with TypeScript

DSL watch

In example 2-reactivity/reactive-statements , we don’t need to use “$” to denote reactivity, instead we use DSL “watch”. The intention is clear here: watch count, if changed, execute the following statements.

React style component

Another Frontend Framework: Svelte with TypeScript

3-props/declaring-props

Another Frontend Framework: Svelte with TypeScript

3-props/declaring-props

We still use the React way to write component, and we don’t need to return JSX, just write it as is.

JSX as Template

We use JSX, but in template way, see examples in 4-logic :

We have “await ” tag to deal with promise, which is intuitive and straightforward:

Another Frontend Framework: Svelte with TypeScript

await

And traditional “if” and “for” logic:

Another Frontend Framework: Svelte with TypeScript

if

Another Frontend Framework: Svelte with TypeScript

logic “for”, using “each” tag

Slot

We can use slot with full power of typescript as well!

Another Frontend Framework: Svelte with TypeScript

use slot

Another Frontend Framework: Svelte with TypeScript

use slot props

Transition & Animation

Let’s take transition as an example: 10-transitions/transition :

Another Frontend Framework: Svelte with TypeScript

transition

Return 0

That’s the basics of svelte-draft , and we also have template project and TodoMVC implementation .

Any feedback is welcome! :)


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