Unable to resolve module child_process

[Arsh1a]

When using Tesseract.js in my react-native app, I get the following error:

Unable to resolve module child_process from C:\Projects\ocr-app\node_modules\tesseract.js\src\worker\node\spawnWorker.js: child_process could not be found within the project.

If you are sure the module exists, try these steps:
 1. Clear watchman watches: watchman watch-del-all
 2. Delete node_modules and run yarn install
 3. Reset Metro's cache: yarn start --reset-cache
 4. Remove the cache: rm -rf /tmp/metro-*
> 1 | const { fork } = require('child_process');
      |                           ^
   2 |
   3 | let debugPort = 9229;
   4 |

I use Tesseract like this:

import React, { useState, useEffect } from "react";
import { Button, Image, View, Platform, Text } from "react-native";
import * as ImagePicker from "expo-image-picker";
import Tesseract from "tesseract.js";

export default function ImagePickerExample() {
  const [image, setImage] = useState(null);
  const [text, setText] = useState("");

  useEffect(() => {
    (async () => {
      if (Platform.OS !== "web") {
        const { status } = await ImagePicker.requestMediaLibraryPermissionsAsync();
        if (status !== "granted") {
          alert("Sorry, we need camera roll permissions to make this work!");
        }
      }
    })();
  }, []);

  const pickImage = async () => {
    let result = await ImagePicker.launchImageLibraryAsync({
      mediaTypes: ImagePicker.MediaTypeOptions.All,
      allowsEditing: true,
      aspect: [4, 3],
      quality: 1,
    });

    console.log(result);

    if (!result.cancelled) {
      setImage(result.uri);
      Tesseract.recognize(result.uri, "eng", { logger: (m) => console.log(m) }).then(
        ({ data: { text } }) => {
          setText(text);
        }
      );
    }
  };

  return (
    <View style={{ flex: 1, alignItems: "center", justifyContent: "center" }}>
      <Button title="Pick an image from camera roll" onPress={pickImage} />
      {image && <Image source={{ uri: image }} style={{ width: 200, height: 200 }} />}
      {text && <Text>{text}</Text>}
    </View>
  );
}

[digitalbore]

Hi @Arsh1a I have the same problem.
Did you resolve that?

[Balearica]

Closing this issue as the master branch now uses worker_threads rather than child_process (per #630). Therefore, you should not encounter this particular error again. If you encounter a new error, feel free to open a new issue.