EsBuild StartService replacement

user_11713900 0
Viewed 1481

I am new to esBuild and ReactJS and following a guid I decided to building a custom CLI Transpiling application. I got to the point that I am entering a text in textarea but on the console in the client the following error message came out Host version "0.8.27" does not match binary version "0.9.0". I know that I am using an older version, I did try to find a way to resolve the problem first with going trough the documentation since they have completly throw away the startService() method on the new version. But I couldn't find any possible solution to my problem, is there someone with the knowledge to help me solve the problem. Here is my code which has to start the transpiling:

const startService = async () => {
ref.current = await esbuild.startService({
  worker: true,
  wasmURL: '/esbuild.wasm'
})
  }

 useEffect(() => {
    startService()
  }, [])

  const onClick = async () => {
    if (!ref.current) {
      return;
    }
    const result = await ref.current.build({
      entryPoints: ['index.js'],
      bundle: true,
      write: false,
      plugins: [unpkgPathPlugin()]
    })
    console.log(result );
    setCode(result)
  }
esbuild reactjs
3 Answers

The documentation for running esbuild in the browser is here: https://esbuild.github.io/api/#running-in-the-browser. In version 0.9.0, esbuild.startService() became esbuild.initialize() and service.build() became esbuild.build() (i.e. the explicit service object disappeared). So updated code might look something like this:

const startService = async () => {
  await esbuild.initialize({
    worker: true,
    wasmURL: '/esbuild.wasm'
  })
  ref.current = true
}

useEffect(() => {
  startService()
}, [])

const onClick = async () => {
  if (!ref.current) {
    return;
  }
  const result = await esbuild.build({
    entryPoints: ['index.js'],
    bundle: true,
    write: false,
    plugins: [unpkgPathPlugin()]
  })
  console.log(result);
  setCode(result)
}
user_8759300

Note that there is no async API available when running in the browser. Also, I didn't want to be throwing 'already initialized' every time I hot reloaded while editing. This is how I set this up:

import { useState, useEffect } from 'react';
import './App.css';
import * as esbuild from 'esbuild-wasm';

function App() {
  const [input, setInput] = useState('');
  const [code, setCode] = useState('');

  useEffect(() => {
    // This ugly code is to avoid calling initialize() more than once
    try {
      esbuild.build({});
    } catch (error) {
      if (error instanceof Error && error.message.includes('initialize')) {
        esbuild.initialize({
          worker: false,
          wasmURL: '/esbuild.wasm',
        });
      } else {
        throw error;
      }
    }
  }, []);

  const onClick = () => {
    esbuild
      .transform(input, {
        loader: 'jsx',
        target: 'es2015',
      })
      .then((result) => {
        setCode(result.code);
      });
  };

  return (
    <div className="App">
      <textarea
        value={input}
        onChange={(e) => setInput(e.target.value)}></textarea>
      <div>
        <button onClick={onClick}>Submit</button>
      </div>
      <pre>{code}</pre>
    </div>
  );
}

export default App;
user_2164980

Guys I have a better solution, you can hot reload, and no errors.

const startService = async () => {
if (!window.isEsbuildRunning) {
    await esbuild.initialize({
      worker: true,
      wasmURL: '/esbuild.wasm'
    })
}
    window.isEsbuildRunning = true;
    ref.current = true
  }
  
  useEffect(() => {
    startService()
  }, [])
  
  const onClick = async () => {
    if (!ref.current) {
      return;
    }
    const result = await esbuild.build({
      entryPoints: ['index.js'],
      bundle: true,
      write: false,
      plugins: [unpkgPathPlugin()]
    })
    console.log(result);
    setCode(result)
  }
user_125962960
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