@swc/wasm-web

This modules allows you to synchronously transform code inside the browser using WebAssembly.

Usage

You must first initialize the module before you can use it.

App.jsx
import { 
function useEffect(effect: React.EffectCallback, deps?: React.DependencyList): void

Accepts a function that contains imperative, possibly effectful code.

@parameffect Imperative function that can return a cleanup function@paramdeps If present, effect will only activate if the values in the list change.@version16 .8.0@seehttps://react.dev/reference/react/useEffect
useEffect
,
function useState<S>(initialState: S | (() => S)): [S, React.Dispatch<React.SetStateAction<S>>] (+1 overload)

Returns a stateful value, and a function to update it.

@version16 .8.0@seehttps://react.dev/reference/react/useState
useState
} from "react";
import
function initSwc(module_or_path?: {
    module_or_path: InitInput | Promise<InitInput>;
} | InitInput | Promise<InitInput>): Promise<InitOutput>

If module_or_path is {RequestInfo} or {URL}, makes a request and for everything else, calls WebAssembly.instantiate directly.

@parammodule_or_path - Passing InitInput directly is deprecated.@returns
initSwc
, {
function transformSync(code: string | Program, opts?: Options, experimental_plugin_bytes_resolver?: any): Output
@paramcode@paramopts@paramexperimental_plugin_bytes_resolver An object contains bytes array for the plugin specified in config. Key of record represents the name of the plugin specified in config. Note this is an experimental interface, likely will change.@returns
transformSync
} from "@swc/wasm-web";
export default function
function App(): React.JSX.Element
App
() {
const [
const initialized: boolean
initialized
,
const setInitialized: React.Dispatch<React.SetStateAction<boolean>>
setInitialized
] =
useState<boolean>(initialState: boolean | (() => boolean)): [boolean, React.Dispatch<React.SetStateAction<boolean>>] (+1 overload)

Returns a stateful value, and a function to update it.

@version16 .8.0@seehttps://react.dev/reference/react/useState
useState
(false);
function useEffect(effect: React.EffectCallback, deps?: React.DependencyList): void

Accepts a function that contains imperative, possibly effectful code.

@parameffect Imperative function that can return a cleanup function@paramdeps If present, effect will only activate if the values in the list change.@version16 .8.0@seehttps://react.dev/reference/react/useEffect
useEffect
(() => {
async function
function (local function) importAndRunSwcOnMount(): Promise<void>
importAndRunSwcOnMount
() {
await
function initSwc(module_or_path?: {
    module_or_path: InitInput | Promise<InitInput>;
} | InitInput | Promise<InitInput>): Promise<InitOutput>

If module_or_path is {RequestInfo} or {URL}, makes a request and for everything else, calls WebAssembly.instantiate directly.

@parammodule_or_path - Passing InitInput directly is deprecated.@returns
initSwc
();
const setInitialized: (value: React.SetStateAction<boolean>) => void
setInitialized
(true);
}
function (local function) importAndRunSwcOnMount(): Promise<void>
importAndRunSwcOnMount
();
}, []); function
function (local function) compile(): void
compile
() {
if (!
const initialized: boolean
initialized
) {
return; } const
const result: Output
result
=
function transformSync(code: string | Program, opts?: Options, experimental_plugin_bytes_resolver?: any): Output
@paramcode@paramopts@paramexperimental_plugin_bytes_resolver An object contains bytes array for the plugin specified in config. Key of record represents the name of the plugin specified in config. Note this is an experimental interface, likely will change.@returns
transformSync
(`console.log('hello')`, {});
var console: Console

The console module provides a simple debugging console that is similar to the JavaScript console mechanism provided by web browsers.

The module exports two specific components:

  • A Console class with methods such as console.log(), console.error() and console.warn() that can be used to write to any Node.js stream.
  • A global console instance configured to write to process.stdout and process.stderr. The global console can be used without importing the node:console module.

Warning: The global console object's methods are neither consistently synchronous like the browser APIs they resemble, nor are they consistently asynchronous like all other Node.js streams. See the note on process I/O for more information.

Example using the global console:

console.log('hello world');
// Prints: hello world, to stdout
console.log('hello %s', 'world');
// Prints: hello world, to stdout
console.error(new Error('Whoops, something bad happened'));
// Prints error message and stack trace to stderr:
//   Error: Whoops, something bad happened
//     at [eval]:5:15
//     at Script.runInThisContext (node:vm:132:18)
//     at Object.runInThisContext (node:vm:309:38)
//     at node:internal/process/execution:77:19
//     at [eval]-wrapper:6:22
//     at evalScript (node:internal/process/execution:76:60)
//     at node:internal/main/eval_string:23:3

const name = 'Will Robinson';
console.warn(`Danger ${name}! Danger!`);
// Prints: Danger Will Robinson! Danger!, to stderr

Example using the Console class:

const out = getStreamSomehow();
const err = getStreamSomehow();
const myConsole = new console.Console(out, err);

myConsole.log('hello world');
// Prints: hello world, to out
myConsole.log('hello %s', 'world');
// Prints: hello world, to out
myConsole.error(new Error('Whoops, something bad happened'));
// Prints: [Error: Whoops, something bad happened], to err

const name = 'Will Robinson';
myConsole.warn(`Danger ${name}! Danger!`);
// Prints: Danger Will Robinson! Danger!, to err
@seesource
console
.
Console.log(message?: any, ...optionalParams: any[]): void (+1 overload)

Prints to stdout with newline. Multiple arguments can be passed, with the first used as the primary message and all additional used as substitution values similar to printf(3) (the arguments are all passed to util.format()).

const count = 5;
console.log('count: %d', count);
// Prints: count: 5, to stdout
console.log('count:', count);
// Prints: count: 5, to stdout

See util.format() for more information.

@sincev0 .1.100
log
(
const result: Output
result
);
} return ( <
React.JSX.IntrinsicElements.div: React.DetailedHTMLProps<React.HTMLAttributes<HTMLDivElement>, HTMLDivElement>
div
React.HTMLAttributes<HTMLDivElement>.className?: string | undefined
className
="App">
<
React.JSX.IntrinsicElements.button: React.DetailedHTMLProps<React.ButtonHTMLAttributes<HTMLButtonElement>, HTMLButtonElement>
button
React.DOMAttributes<HTMLButtonElement>.onClick?: React.MouseEventHandler<HTMLButtonElement> | undefined
onClick
={
function (local function) compile(): void
compile
}>Compile</
React.JSX.IntrinsicElements.button: React.DetailedHTMLProps<React.ButtonHTMLAttributes<HTMLButtonElement>, HTMLButtonElement>
button
>
</
React.JSX.IntrinsicElements.div: React.DetailedHTMLProps<React.HTMLAttributes<HTMLDivElement>, HTMLDivElement>
div
>
); }