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module-loader.ts
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module-loader.ts
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const loaderUtils = require('loader-utils')
const compiler = require('@lwc/compiler')
const babel = require('@babel/core')
import { lwcConfig } from '../../config/lwcConfig'
const productionConfig = lwcConfig.lwcCompilerOutput.production
const stylesheetConfig = lwcConfig.lwcCompilerStylesheetConfig
const experimentalDynamicComponent = lwcConfig.lwcExperimentalDynamicComponent
const __PROD__ = process.env.NODE_ENV === 'production'
const { getConfig, getInfoFromPath } = require('./module')
module.exports = function(source: any) {
// @ts-ignore
const { resourcePath } = this
const config = getConfig(loaderUtils.getOptions(this))
let info
try {
info = getInfoFromPath(resourcePath, config)
} catch (e) {
info = {
name: '',
namespace: ''
}
}
const compilerOutput = config.mode ? productionConfig : {}
let codeTransformed = source
if (resourcePath.endsWith('.ts')) {
let { code } = babel.transform(source, {
filename: resourcePath,
plugins: [
require.resolve('@babel/plugin-syntax-class-properties'),
[
require.resolve('@babel/plugin-syntax-decorators'),
{
decoratorsBeforeExport: true
}
]
],
presets: [require.resolve('@babel/preset-typescript')]
})
codeTransformed = code
}
// @ts-ignore
const cb = this.async()
compiler
.transform(codeTransformed, resourcePath, {
name: info.name,
namespace: info.ns,
outputConfig: compilerOutput,
stylesheetConfig,
experimentalDynamicComponent
})
.then((res: any) => {
cb(null, res.code)
})
.catch((err: any) => {
cb(err)
})
return
}