标签: uglifyjs

我正在使用Grunt连接grunt-contrib-uglify任务来缩小我的应用程序中的JavaScript.

在缩小时,它会删除'use strict'除第一个之外的所有语句,因此我将获得一个巨大的JavaScript文件,顶部带有"use strict"指令.

问题是全局'use strict'指令使浏览器在"严格模式"下执行我在项目中使用的每个lib的代码,并且它导致错误,因为不是每个第三方代码都是为严格模式编写的.

关于如何解决这个问题的任何想法？

我有一个使用grunt,browserify和uglify的SPA ASP.NET项目.当我尝试在Chrome调试器中查看JavaScript时,它会显示缩小的JavaScript并且似乎忽略了地图文件.在IE11和Firefox中,调试器正确显示未分析的JavaScript.我确认在Chrome选项中选中了"启用JavaScript源地图".

在Chrome中,缩小文件的最后一行是:

//# sourceMappingURL=bundledApp.min.js.map

这是我的完整gruntfile:

module.exports = function (grunt) {

grunt.initConfig({
    clean: ['dist'],
    browserify: {
        build: {
            files: {
                "dist/bundledApp.js": [
                    './Scripts/jquery-2.1.4.js',
                    './Scripts/underscore.js',
                    './Scripts/backbone.js',
                    './App/App.js',
                    './App/**/*.js',
                    '!./App/**/*-spec.js'
                ]
            },
            options: {
                alias: {
                    'jquery': './Scripts/jquery-2.1.4.js',
                    'underscore': './Scripts/underscore.js',
                    'backbone': './Scripts/backbone.js'
                },
                transform: ['node-underscorify']
            }
        },
        test: {
            files: {
                "dist/bundledApp.js": [
                    './Scripts/jquery-2.1.4.js',
                    './Scripts/underscore.js',
                    './Scripts/backbone.js',
                    './App/App.js',
                    './App/**/*.js'
                ]
            },
            options: {
                alias: {
                    'jquery': './Scripts/jquery-2.1.4.js',
                    'underscore': './Scripts/underscore.js',
                    'backbone': './Scripts/backbone.js'
                },
                transform: ['node-underscorify']
            }
        }
    },
    less: {
        debug: {
            options: { …

在尝试在生产中构建一个ember应用程序时,我已经有两个星期的错误了.在开发环境中构建它工作正常.我还意识到在ember-cli-build中禁用minifyJs会阻止错误,但是然后,应用程序在浏览器中加载时会停滞不前,而在控制台中,我看到另一个错误:"无法导入ember-resolver".

我的猜测是,这是因为UglifyWriter不了解某些代码.

完整的错误是:

构建失败.文件:assets/vendor.js(95443:4)Broccoli插件:[UglifyWriter]失败:新JS_Parse_Error错误(eval at(/home/larisoft/frontend/node_modules/uglify-js/tools/node.js:1 :1),:1545:18)

at js_error (eval at <anonymous> (/home/larisoft/frontend/node_modules/uglify-js/tools/node.js:1:1), <anonymous>:1553:11)

at croak (eval at <anonymous> (/home/larisoft/frontend/node_modules/uglify-js/tools/node.js:1:1), <anonymous>:2092:9)

at token_error (eval at <anonymous> (/home/larisoft/frontend/node_modules/uglify-js/tools/node.js:1:1), <anonymous>:2100:9)

at unexpected (eval at <anonymous> (/home/larisoft/frontend/node_modules/uglify-js/tools/node.js:1:1), <anonymous>:2106:9)

at semicolon (eval at <anonymous> (/home/larisoft/frontend/node_modules/uglify-js/tools/node.js:1:1), <anonymous>:2126:56)

at simple_statement (eval at <anonymous> (/home/larisoft/frontend/node_modules/uglify-js/tools/node.js:1:1), <anonymous>:2317:73)

at eval (eval at <anonymous> (/home/larisoft/frontend/node_modules/uglify-js/tools/node.js:1:1), <anonymous>:2186:19)

at eval (eval at <anonymous> (/home/larisoft/frontend/node_modules/uglify-js/tools/node.js:1:1), <anonymous>:2139:24)

at block_ (eval at <anonymous> (/home/larisoft/frontend/node_modules/uglify-js/tools/node.js:1:1), <anonymous>:2432:20)

西兰花插件在以下地址实例化:UglifyWriter.Plugin(/home/larisoft/frontend/node_modules/broccoli-plugin/index.js:7:31)

at new UglifyWriter (/home/larisoft/frontend/node_modules/broccoli-uglify-sourcemap/index.js:25:10)

at UglifyWriter (/home/larisoft/frontend/node_modules/broccoli-uglify-sourcemap/index.js:20:12)

at Class.postprocessTree (/home/larisoft/frontend/node_modules/ember-cli-uglify/index.js:15:50) …

我console.log()在开发应用程序时使用了很多语句（我的意思是LOTS）。在没有Create React App 的情况下"ejecting"， 我究竟如何才能删除它们 我考虑过但不确定如何实现：

 "build": "react-scripts build && uglifyjs --compress drop_console build/static/js/main.xxxxx.js  -o build/static/js/main.xxxxx.js