ES6通过jspm错误在Firefox, Edge, Vivaldi，但工作在Chrome, Opera

Question

我使用ES6通过jspm + SystemJS + traceur根据jspm教程。

在Chrome和Opera中一切正常，然而，控制台在其他浏览器中发布各种错误。

Firefox: SyntaxError: class is a reserved identifier, uncaught exception: SyntaxError: class is a reserved identifier

边缘:SCRIPT1002: Syntax error, Potentially unhandled rejection [2] Syntax error

Vivaldi: Unexpected token =>

SystemJS自述声明它甚至可以运行IE8+。

My jspm.config.js:

System.config({
  baseURL: "/",
  defaultJSExtensions: true,
  transpiler: "traceur",
  babelOptions: {
    "optional": [
      "runtime",
      "optimisation.modules.system"
    ]
  },
  paths: {
    "github:*": "jspm_packages/github/*",
    "npm:*": "jspm_packages/npm/*"
  },
  shim: {
    "packages": {
      "assets/js/lib/tabs": {
        "main": "tabby",
        "format": "global",
        "deps": "jquery",
        "exports": "$.tabby"
      },
      "assets/js/lib/select": {
        "main": "selectify",
        "format": "global",
        "deps": "jquery",
        "exports": "$.selectify"
      }
    }
  },
  map: {
    "babel": "npm:babel-core@5.8.25",
    "babel-runtime": "npm:babel-runtime@5.8.25",
    "core-js": "npm:core-js@1.2.1",
    "jquery": "github:components/jquery@2.1.4",
    "jquery-mask-plugin": "npm:jquery-mask-plugin@1.13.4",
    "jquery-validation": "github:jzaefferer/jquery-validation@1.14.0",
    "selectify": "assets/js/lib/select",
    "tabby": "assets/js/lib/tabs",
    "traceur": "github:jmcriffey/bower-traceur@0.0.91",
    "traceur-runtime": "github:jmcriffey/bower-traceur-runtime@0.0.91",
    "github:jspm/nodelibs-assert@0.1.0": {
      "assert": "npm:assert@1.3.0"
    },
    "github:jspm/nodelibs-process@0.1.2": {
      "process": "npm:process@0.11.2"
    },
    "github:jspm/nodelibs-util@0.1.0": {
      "util": "npm:util@0.10.3"
    },
    "github:jzaefferer/jquery-validation@1.14.0": {
      "jquery": "github:components/jquery@2.1.4"
    },
    "npm:assert@1.3.0": {
      "util": "npm:util@0.10.3"
    },
    "npm:babel-runtime@5.8.25": {
      "process": "github:jspm/nodelibs-process@0.1.2"
    },
    "npm:core-js@1.2.1": {
      "fs": "github:jspm/nodelibs-fs@0.1.2",
      "process": "github:jspm/nodelibs-process@0.1.2",
      "systemjs-json": "github:systemjs/plugin-json@0.1.0"
    },
    "npm:inherits@2.0.1": {
      "util": "github:jspm/nodelibs-util@0.1.0"
    },
    "npm:process@0.11.2": {
      "assert": "github:jspm/nodelibs-assert@0.1.0"
    },
    "npm:util@0.10.3": {
      "inherits": "npm:inherits@2.0.1",
      "process": "github:jspm/nodelibs-process@0.1.2"
    }
  }
});

And package.json:

{
  "name": "project_name",
  "version": "1.0.0",
  "description": "project_description",
  "scripts": {
    "test": "echo "Error: no test specified" && exit 1"
  },
  "author": "project_author",
  "license": "ISC",
  "devDependencies": {
    "glob": "^5.0.15",
    "gulp": "^3.9.0",
    "gulp-autoprefixer": "^3.0.2",
    "gulp-concat-css": "^2.2.0",
    "gulp-imagemin": "^2.3.0",
    "gulp-jspm": "^0.3.2",
    "gulp-less": "^3.0.3",
    "gulp-minify-css": "^1.2.1",
    "gulp-notify": "^2.2.0",
    "gulp-rename": "^1.2.2",
    "imagemin-pngquant": "^4.2.0",
    "jspm": "^0.16.11"
  },
  "jspm": {
    "configFile": "jspm.config.js",
    "dependencies": {
      "jquery": "github:components/jquery@^2.1.4",
      "jquery-mask-plugin": "npm:jquery-mask-plugin@^1.13.4",
      "jquery-validation": "github:jzaefferer/jquery-validation@^1.14.0"
    },
    "devDependencies": {
      "babel": "npm:babel-core@^5.8.24",
      "babel-runtime": "npm:babel-runtime@^5.8.24",
      "core-js": "npm:core-js@^1.1.4",
      "traceur": "github:jmcriffey/bower-traceur@0.0.91",
      "traceur-runtime": "github:jmcriffey/bower-traceur-runtime@0.0.91"
    }
  }
}

迫切想解决这个问题，据我所知，可能有很多原因。也许有人遇到了类似的问题，设置

Answer 1

明白了

这是由于jspm.config.js shim中提供的一个插件。该插件使用Immediately-Invoked Arrow Function符号和class字，没有任何导出指令，因此，shim插件没有被翻译成ES5。

因此，与其在第三方库(shim插件)中使用ES6类，不如使用简单的原型继承。

我花了好几个小时才找到。