Question

问题：

我使用webpack包来定位和转换ES6。

我想在没有try / catch块的情况下捕获错误。我怎样才能得到这个，是什么原因使异常沉默？这个问题不仅仅出现在constructor（）方法中。该类的任何方法都会像这样无声地发生错误

import React from 'react';
class TestComponent extends React.Component {
    constructor(props) {
        super(props);
        /*
            Try/catch block works fine.
            "test is not defined(…)" 
        */
        try {
            test.fake(1);
        } catch (e) {
            console.error(e);
        }
        // Line below should theoretically throw exception but it does not 
        test.fake(1);
    }
    render() {
        return <div>TEST</div>
    }
}
export default TestComponent;

这是我的webpack.config

var path = require('path');
var webpack = require('webpack');
var ExtractTextPlugin = require('extract-text-webpack-plugin');
var HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
    devtool: 'cheap-module-eval-source-map',
    //devtool: 'eval',
    entry: [
        'webpack-dev-server/client?http://localhost:3000',
        'webpack/hot/only-dev-server',
        './src/js/main'
    ],
    output: {
        filename: 'app.js',
        path: path.join(__dirname, 'dist'),
        publicPath: '/assets/'
    },
    plugins: [
        new webpack.HotModuleReplacementPlugin(),
        new webpack.NoErrorsPlugin(),
        new ExtractTextPlugin('app.css', {
            allChunks: true
        }),
        new webpack.DefinePlugin({
            __DEV_TOOLS__: true
        }),
        new HtmlWebpackPlugin({
            title: 'Redux Boilerplate',
            filename: 'index.html',
            template: 'index.template.html'
        })
    ],
    resolve: {
        root: path.resolve('./src/js')
    },
    module: {
        loaders: [
            {
                test: /\.scss$/,
                loader: ExtractTextPlugin.extract('style-loader', 'css-loader!sass')
            }, {
                test: /\.js$/,
                loaders: ['babel'],
                exclude: /node_modules/
            }
        ]
    },
    cssnext: {
        browsers: 'last 2 versions'
    }
};

Answer 1

Webpack将 transile 无法编译您的代码。当您转换上述内容时，没有语法问题或缺少要求，因此webpack将通过babel运行该代码并转换为EC5。您可能希望查找在转换后实际执行代码的加载程序或插件。更好的是，结合webpack与gulp或业力，并获得一个完整的解决方案。我们使用这样的东西。 https://github.com/webpack/karma-webpack

ES6（babel + webpack）类方法中的无提示错误

1 个答案: