swc-plugin-jsx-control-statements v0.6.0

🦀 JSX control statements for swc

Original idea: babel-plugin-jsx-control-statements

Installation

pnpm (recommended):

pnpm i -D swc-plugin-jsx-control-statements

or yarn

yarn add -D swc-plugin-jsx-control-statements

Configure swc

In your SWC config, you have to add to jsc.experimental.plugins - ['swc-plugin-jsx-control-statements', {}], like in the following code:

jsc: {
    experimental: {
        plugins: [
            ['swc-plugin-jsx-control-statements', {}],
        ],
    },
},

Usage

<If> tag

import React from 'react';

const Greeting = () => {
    const [closed, setClosed] = useState(false);

    return (
        <>
            <If condition={!closed}>
                Hello,
            </If>
            World
            <If condition={!closed}>
                <button onClick={() => setClosed(true)}>Close</button>
            </If>
        </>
    )
};

<Choose> tag (if - else if - else condition)

import React from 'react';

const Greeting = () => {
    const [closed, setClosed] = useState(false);

    return (
        <>
            <Choose>
                <When condition={!closed}>
                    Hello,
                </When>
                <Otherwise>
                    Bye,
                </Otherwise>
            </Choose>
            World
            <If condition={!closed}>
                <button onClick={() => setClosed(true)}>Close</button>
            </If>
        </>
    )
};

For tag (like array map function)

import React from 'react';

const TodoList = ({ items }) => {
    return (
        <For each="item" of={items}>
            <span key={item.id}>{item.title}</span>
        </For>
    );
};

!WARNING
using the index as key attribute is not stable if the array changes

<For each="item" index="idx" of={[1, 2, 3]}>
  <span key={idx}>{item}</span>
  <span key={`${idx}_2`}>Static Text</span>
</For>

With tag

Simple

import React from 'react';

const SomeComponent = ({ items }) => {
    return (
        <With foo={47} bar="test">
            <span>{foo}</span>
            <span>{bar}</span>
        </With>
    );
};

Nested

import React from 'react';

const SomeComponent = ({ items }) => {
    return (
        <With foo={47}>
            <With bar="test">
                <span>{foo}</span>
                <span>{bar}</span>
            </With>
        </With>
    );
};