我想在webpack编译时动态地包含一个.js文件。webpack val loader造成异常
我不想使用上下文来加载环境变量,因为我的代码中没有这些魔术变量。
我想要做的是使用val加载器来执行一个模块。使用环境变量来决定要导入的模块。并导出该模块。
但是,这导致其他装载机抛出错误。
这里是我的目录布局
--base
--src
app.js
test.js
webpack.config.js
rawr.js
这里我webpack.config.js文件
var path = require('path');
var webpack = require('webpack');
// var process = require('process');
var env = require(process.env.NODE_ENV || './devConf.js');
module.exports = {
// Specify logical root of the sourcecode
plugins: [
new webpack.DefinePlugin(env)
],
context: path.join(__dirname, '/src'),
entry: {
app: ['bootstrap.js'],
},
// Specify where to put the results
output: {
path: path.join(__dirname, '/dist'),
filename: 'build.js'
},
// Specify logical root of package imports so as to avoid relative path everywhere
resolve: {
root: path.join(__dirname, '/src'),
// What files we want to be able to import
extensions: ['', '.js', '.css', '.less'],
},
module: {
preLoaders: [
// Lint all js before compiling
/*{
test: /\.js$/,
exclude: /node_modules/,
loader: 'eslint-loader'
}*/
],
loaders: [
{
test: /\.js$/,
query: {
presets: ['es2015']
},
exclude: /node_modules/,
loader: 'babel'
},
{
test: /\.tpl\.html$/,
exclude: /node_modules/,
loader: 'ngtemplate?relativeTo=/src/!html'
},
{
test: /\.scss$/,
loaders: ["style", "css", "sass"]
},
{
test: /\.css$/,
loaders: ["style", "css"]
}
]
},
// Dev server settings
devServer: {
contentBase: path.join(__dirname, '/dist'),
noInfo: false,
hot: true
},
// ESLint config
eslint: {
configFile: path.join(__dirname, '.eslintrc')
}
};
我的js文件看起来像这样
// app.js
let b = require('val!test.js');
// test.js
var process = require('process');
loadedModule = require(process.env.NODE_ENV) // NODE_ENV='./rawr.js'
export const myString = loadedModule
// rawr.js
module.exports.test = "hello world";
,我发现了异常:
ERROR in ./src/app/app.js
Module parse failed: /home/smaug/Projects/angular-template/node_modules/babel-loader/index.js?{"presets":["es2015"]}!/home/smaug/Projects/angular-template/src/app/app.js Line 1: Unexpected identifier
You may need an appropriate loader to handle this file type.
| 'use strict';
|
| require('angular-animate');
@ ./src/bootstrap.js 7:0-18
它与我试图做的事无关。但是如果我删除require('val!...')声明,它就会消失。
任何想法?
UPDATE:
如果我改变需要声明是
let b = require('val!./test.js');
我得到以下错误:
ERROR in ./~/val-loader!./src/app/test.js
Module build failed: Error: Final loader didn't return a Buffer or String
at DependenciesBlock.onModuleBuild (/home/smaug/Projects/angular-template/node_modules/webpack-core/lib/NormalModuleMixin.js:299:42)
at nextLoader (/home/smaug/Projects/angular-template/node_modules/webpack-core/lib/NormalModuleMixin.js:275:25)
at /home/smaug/Projects/angular-template/node_modules/webpack-core/lib/NormalModuleMixin.js:292:15
at runSyncOrAsync (/home/smaug/Projects/angular-template/node_modules/webpack-core/lib/NormalModuleMixin.js:160:12)
at nextLoader (/home/smaug/Projects/angular-template/node_modules/webpack-core/lib/NormalModuleMixin.js:290:3)
at /home/smaug/Projects/angular-template/node_modules/webpack-core/lib/NormalModuleMixin.js:292:15
at Object.context.callback (/home/smaug/Projects/angular-template/node_modules/webpack-core/lib/NormalModuleMixin.js:148:14)
at Object.module.exports (/home/
我得到一个diff错误。 ./~/val-loader!./src/app/test.js中的错误 模块构建失败:错误:最终加载程序没有返回缓冲区或字符串 – user2734679
这次,加载程序工作?该错误稍后发生?如果是这样,请提供以下错误。 – topheman
我不知道是否晚点。我会在问题中包含错误。 – user2734679