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[英]Test an Async function in JS - Error: "Did you forget to use await"
[英]Gulp 4 error: The following tasks did not complete: Did you forget to signal async completion?
當isDev = false
時出現此錯誤。 這是我的 gulpfile.js 的一部分
function CSSLoaders(isDev) {
let loaders = []
isDev ? loaders.push('vue-style-loader') : loaders.push(MiniCssExtractPlugin.loader)
loaders.push({
loader: 'css-loader',
options: {
url: false,
sourceMap: isDev,
importLoaders: isDev ? 1 : 2,
modules: {
localIdentName: "[local]"
}
}
})
if (!isDev) {
loaders.push('postcss-loader')
loaders.push({
loader: 'string-replace-loader',
options: {
multiple: [...Array(100).fill({search: '../..', replace: ''})]
}
})
}
return loaders
}
function webpackConfig(isDev) {
return {
output: {
filename: '[name].js'
},
resolve: {
extensions: ['.js', '.vue', '.json'],
alias: {
// 'vue': 'vue/dist/vue.esm-bundler.js',
'vue': 'vue/dist/vue.esm.js',
// 'mixins-c': path.resolve(__dirname, '../../sass/_mixins-c.scss;')
}
},
module: {
rules: [
{
test: /\.s[ac]ss$/i,
use: CSSLoaders(isDev)
},
{
test: /\.vue$/,
loader: 'vue-loader'
},
{
test: /\.js$/,
loader: 'babel-loader',
exclude: '/node_modules/'
}
]
},
plugins: [
new VueLoaderPlugin(),
new MiniCssExtractPlugin({
filename: isDev ? 'css/[name].css' : 'skin/lightui/css/[name].css'
}),
// new cssoLoader(),
new webpack.LoaderOptionsPlugin({
minimize: true
})
],
optimization: {
minimizer: [
new UglifyJsPlugin({
sourceMap: false,
uglifyOptions: {
warnings: false,
compress: true
}
})
],
},
mode: isDev ? 'development' : 'production',
devtool: isDev ? 'eval-source-map' : 'none'
}
};
function js_build() {
return src(['src/pages/**/js/*.js'])
.pipe(named())
.pipe(webpackStream(webpackConfig(false)))
.pipe(dest('dist/js/'))
}
let build = gulp.series(js_build)
exports.build = build
我試過了
async function js_build() {
return await src(['src/pages/**/js/*.js'])
.pipe(named())
.pipe(webpackStream(webpackConfig(false)))
.pipe(dest('dist/js/'))
}
和
var print = require('gulp-print');
function js_build() {
return src(['src/pages/**/js/*.js'])
.pipe(named())
.pipe(webpackStream(webpackConfig(false)))
.pipe(dest('dist/js/'))
.pipe(print.default(function() { return 'HTTP Server Started'; }));
}
但是得到了同樣的錯誤。 我發現問題隨着 function CSSLoaders() 中的塊消失了:
if (!isDev) {
loaders.push('postcss-loader')
loaders.push({
loader: 'string-replace-loader',
options: {
multiple: [...Array(100).fill({search: '../..', replace: ''})]
}
})
}
我不明白為什么我可以正確使用“css-loader”而不能使用“postcss-loader”,有什么區別? 我應該把標志放在哪里,異步完成? 誰能幫我理解我應該做什么?
使用回調和 onEnd 方法應該可以解決問題。
function js_build(callback) {
return src(['src/pages/**/js/*.js'])
.pipe(named())
.pipe(webpackStream(webpackConfig(false)))
.pipe(dest('dist/js/'))
.pipe(print.default(function() { return 'HTTP Server Started'; }))
.on('end', function () {
callback();
});
}
這個問題在這里得到了回答: Gulp 錯誤:以下任務未完成:您是否忘記發出異步完成信號?
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