comment faire pour résoudre cette erreur, Vous pourriez avoir besoin d'un chargeur approprié pour traiter ce type de fichier

J'ai eu cette erreur avec cette bibliothèque https://github.com/react-native-web-community/react-native-web-linear-gradient/

l'erreur de lien
https://github.com/react-native-web-community/react-native-web-linear-gradient/issues/1
détails de l'erreur:
Module d'analyser échoué: Unexpected token (5:22)
Vous aurez besoin d'un chargeur approprié pour traiter ce type de fichier.

mon webpack:

'use strict';
const autoprefixer = require('autoprefixer');
const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
const WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
const eslintFormatter = require('react-dev-utils/eslintFormatter');
const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
const getClientEnvironment = require('./env');
const paths = require('./paths');
const publicPath = '/';
const publicUrl = '';
const env = getClientEnvironment(publicUrl);
module.exports = {
devtool: 'cheap-module-source-map',
entry: [
require.resolve('./polyfills'),
require.resolve('react-dev-utils/webpackHotDevClient'),
paths.appIndexJs,
],
output: {
pathinfo: true,
filename: 'static/js/bundle.js',
chunkFilename: 'static/js/[name].chunk.js',
publicPath: publicPath,
devtoolModuleFilenameTemplate: info =>
path.resolve(info.absoluteResourcePath).replace(/\\/g, '/'),
},
resolve: {
modules: ['node_modules', paths.appNodeModules].concat(
process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
),
extensions: ['.web.js', '.mjs', '.js', '.json', '.web.jsx', '.jsx'],
alias: {
'babel-runtime': path.dirname(
require.resolve('babel-runtime/package.json')
),
'react-native': 'react-native-web',
'react-native-linear-gradient': 'react-native-web-linear-gradient'
},
plugins: [
new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]),
],
},
module: {
strictExportPresence: true,
rules: [
{
test: /\.(js|jsx|mjs)$/,
enforce: 'pre',
use: [
{
options: {
formatter: eslintFormatter,
eslintPath: require.resolve('eslint'),
baseConfig: {
extends: [require.resolve('eslint-config-react-app')],
},
ignore: false,
useEslintrc: false,
},
loader: require.resolve('eslint-loader'),
},
],
include: paths.appSrc,
},
{
oneOf: [
{
test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
loader: require.resolve('url-loader'),
options: {
limit: 10000,
name: 'static/media/[name].[hash:8].[ext]',
},
},
{
test: /\.(js|jsx|mjs)$/,
include: paths.appSrc,
loader: require.resolve('babel-loader'),
options: {
babelrc: false,
presets: [require.resolve('babel-preset-react-app')],
cacheDirectory: true,
},
},
{
test: /\.css$/,
use: [
require.resolve('style-loader'),
{
loader: require.resolve('css-loader'),
options: {
importLoaders: 1,
},
},
{
loader: require.resolve('postcss-loader'),
options: {
ident: 'postcss',
plugins: () => [
require('postcss-flexbugs-fixes'),
autoprefixer({
browsers: [
'>1%',
'last 4 versions',
'Firefox ESR',
'not ie < 9', //React doesn't support IE8 anyway
],
flexbox: 'no-2009',
}),
],
},
},
],
},
{
exclude: [/\.js$/, /\.html$/, /\.json$/],
loader: require.resolve('file-loader'),
options: {
name: 'static/media/[name].[hash:8].[ext]',
},
},
],
},
],
},
plugins: [
new InterpolateHtmlPlugin(env.raw),
new HtmlWebpackPlugin({
inject: true,
template: paths.appHtml,
}),
new webpack.NamedModulesPlugin(),
new webpack.DefinePlugin(env.stringified),
new webpack.HotModuleReplacementPlugin(),
new CaseSensitivePathsPlugin(),
new WatchMissingNodeModulesPlugin(paths.appNodeModules),
new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
],
node: {
dgram: 'empty',
fs: 'empty',
net: 'empty',
tls: 'empty',
child_process: 'empty',
},
performance: {
hints: false,
},
};

la classe qui rend le problème:

import React, { PureComponent } from 'react';
import { View } from 'react-native';
export default class LinearGradient extends PureComponent {
static defaultProps = {
start: {
x: 0.5,
y: 0,
},
end: {
x: 0.5,
y: 1,
},
locations: [],
colors: [],
};
state = {
width: 1,
height: 1,
};
measure = ({ nativeEvent }) =>
this.setState({
width: nativeEvent.layout.width,
height: nativeEvent.layout.height,
});
getAngle = () => {
//Math.atan2 handles Infinity
const angle =
Math.atan2(
this.state.width * (this.props.end.y - this.props.start.y),
this.state.height * (this.props.end.x - this.props.start.x)
) +
Math.PI / 2;
return angle + 'rad';
};
getColors = () =>
this.props.colors
.map((color, index) => {
const location = this.props.locations[index];
let locationStyle = '';
if (location) {
locationStyle = ' ' + location * 100 + '%';
}
return color + locationStyle;
})
.join(',');
render() {
return (
<View
style={[
this.props.style,
{ backgroundImage: `linear-gradient(${this.getAngle()},${this.getColors()})` },
]}
onLayout={this.measure}
>
{this.props.children}
</View>
);
}
}

statique des defaultprops et ()=> faire le bug donc ce qui pourrait être mauvais?