如何解决此错误，您可能需要适当的加载程序来处理此文件类型 [英] how to solve this error You may need an appropriate loader to handle this file type
本文介绍了如何解决此错误，您可能需要适当的加载程序来处理此文件类型的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
该库 https://github.com/react-native-web-community/react-native-web-linear-gradient/
错误链接 https://github.com/react -native-web-community/react-native-web-linear-gradient/issues/1 错误的详细信息: 模块解析失败:意外的令牌(5:22) 您可能需要适当的加载程序来处理此文件类型.
the error link https://github.com/react-native-web-community/react-native-web-linear-gradient/issues/1 details of error: Module parse failed: Unexpected token (5:22) You may need an appropriate loader to handle this file type.
我的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,
},
};
造成问题的班级:
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>
);
}
}
静态defaultProps 和()=>会导致此错误，这可能是什么问题?
static defaultProps and ()=> make the bug so what could be wrong?
推荐答案
部分修复 >>
步骤:
1- npm install babel babel-cli --save-dev
2-我添加"transpile": "babel src/index.js --out-file src/index-transpiled.js"
在package.json脚本中
2-I add "transpile": "babel src/index.js --out-file src/index-transpiled.js"
in package.json scripts
3- yarn transpile
4-我将ES5文件移到了我的代码中，并且可以正常工作
4-I moved the ES5 file to my code and it worked
更新-完全修复
我包含了我的src文件夹以及也要混音的库
I included my src folder and the libraries to babel too
// Process JS with Babel.
{
test: /\.(js|jsx|mjs)$/,
include: [
/src\/*/,
/node_modules\/react-native-/,
],
loader: require.resolve('babel-loader'),
options: {
babelrc: false,
presets: [require.resolve('babel-preset-react-native')],
cacheDirectory: true
}
},
这篇关于如何解决此错误，您可能需要适当的加载程序来处理此文件类型的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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