Question

我是angular2的新手，需要帮助。我正在开发一个angular2应用程序，其后端是用Java Spring编写的。该应用程序之前运作良好。我没有更改任何代码，但现在当我在chrome中加载它时，它仍然在加载时...我检查了控制台但没有错误。如果我尝试在firefox或safari中打开它，它加载完美但在Firefox中我无法提交表单（可能是兼容性问题？）。

应用程序是用＃34; angular2＆＃34;：＆＃34; 2.0beta.0-.14＆＃34; 。由于Angular2 RC5已经发布，所以代码已经过时了吗？我是否应该对代码进行更改？

的index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>BMIS</title>
    <base href="/">

    <!-- Angular JS  -->

    <!-- 1. Load libraries -->
    <!-- IE required polyfills, in this exact order -->
    <script src="node_modules/es6-shim/es6-shim.min.js"></script>
    <script src="node_modules/systemjs/dist/system-polyfills.js"></script>
    <script src="node_modules/angular2/es6/dev/src/testing/shims_for_IE.js"></script>

    <script src="node_modules/angular2/bundles/angular2-polyfills.js"></script>
    <script src="node_modules/systemjs/dist/system.src.js"></script>
    <script src="node_modules/rxjs/bundles/Rx.js"></script>
    <script src="node_modules/angular2/bundles/angular2.dev.js"></script>
    <script src="node_modules/angular2/bundles/http.dev.js"></script>
    <script src="node_modules/angular2/bundles/router.dev.js"></script>


    <!-- 2. Configure SystemJS -->

    <script>
        System.config({

            packages: {
                app: {
                    format: 'register',
                    defaultExtension: 'js',
                }
            },
            map: {
                "angular2-jwt": "node_modules/angular2-jwt/angular2-jwt.js"
            }
        });
        System.import('app/main')
                .then(null, console.error.bind(console));
    </script>

    <!-- Angular JS  -->


    <!-- Bootstrap -->
    <link href="assets/css/bootstrap.min.css" rel="stylesheet" />
    <link href="assets/css/custom.css" rel="stylesheet" />
    <!-- Bootstrap -->

    <!-- Timeline css -->
    <link href="assets/css/timeline.min.css" rel="stylesheet" />
    <!-- Timeline css -->


    <!-- Navigation -->
    <link href="assets/css/navbar.css" rel="stylesheet" />
    <script src="assets/js/navbar.js" type="text/javascript"></script>
    <!-- Navigation -->

    <!-- Font Awesome -->
    <link rel="stylesheet" href="assets/css/font-awesome.min.css">

    <!-- Font Awesome -->


</head>
<body>
    <app>Loading...</app>
</body>
</html>

的package.json

{
  "name": "abcd",
  "version": "1.0.0",
  "scripts": {
    "start": "concurrently \"npm run tsc:w\" \"npm run lite\" ",
    "tsc": "tsc",
    "tsc:w": "tsc -w",
    "lite": "lite-server",
    "typings": "typings",
    "postinstall": "typings install"
  },
  "license": "ISC",
  "dependencies": {
    "angular2": "2.0beta.0-.14",
    "es6-promise": "^3.0.2",
    "es6-shim": "^0.35.0",
    "ng2-radio-group": "0.0.2",
    "reflect-metadata": "0.1.2",
    "rxjs": "5.0.0-beta.2",
    "systemjs": "0.19.24",
    "zone.js": "0.6.10"
  },
  "devDependencies": {
    "concurrently": "^2.0.0",
    "lite-server": "^2.1.0",
    "typescript": "^1.8.9",
    "typings": "^0.7.9"
  }
}

Answer 1

您必须遵循升级路径。第一步是检查RC1的升级路径：

http://www.picnet.com.au/blogs/guido/post/2016/05/10/upgrading-from-angular-2-beta-17-to-angular-2-rc1/

如果您没有routing

，升级不应该成为问题

接下来将升级到 RC5 。主要的突破性变化是使用NgModules进行自举。检查https://angular.io/docs/ts/latest/cookbook/rc4-to-rc5.html以了解具体步骤。

Angular 2应用程序未在Chrome中加载 - 卡住加载... - 后端用Java Spring编写

1 个答案: