Angular 2 TypeError：無法讀取null的屬性“動畫”

Question

我正在使用Chrome 51和Angular 2.rc4，並且在加載我的角度應用程序時，控制台中會彈出以下錯誤消息。

TypeError: Cannot read property 'animate' of null
at e.supportsWebAnimation (platform-browser.umd.js:2232)
at st (platform-browser.umd.js:2896)
at t._instantiate (core.umd.js:6370)
at t._instantiateProvider (core.umd.js:6311)
at t._new (core.umd.js:6300)
at t.getObjByKeyId (core.umd.js:5954)
at t._getByKeyDefault (core.umd.js:6480)
at t._getByKey (core.umd.js:6452)
at t._getByReflectiveDependency (core.umd.js:6442)
at t._instantiate (core.umd.js:6342)
at c (vendors.js:3)
at vendors.js:3
at t.invokeTask (vendors.js:3)
at Object.onInvokeTask (core.umd.js:9091)
at t.invokeTask (vendors.js:3)
at t.runTask (vendors.js:3)
at s (vendors.js:3)
at XMLHttpRequest.invoke (vendors.js:3)

如果我再次刷新它，它就會消失並且應用程序可以正常加載。 當我進一步研究它時，我發現了以下有問題的代碼，其中文件body在文件platform-browser.umd.js似乎為null 。

BrowserDomAdapter.prototype.supportsWebAnimation = function () {
        return isFunction(document.body['animate']);
};

我正在使用systemjs-builder綁定角度組件，如下所示：

//Bundle auth module to a single script file
gulp.task('bundle_auth', ['bundle_vendors'], function() {
var builder_auth = new Builder('', 'assets/js/dependencies/config/auth.system.js');
return builder_auth
    .buildStatic('assets/app/auth/main.js', 'assets/dist/js/auth/bundle.js', { minify: true, sourceMaps: true })
    .then(function() {
        //console.log('Build complete for auth module');
    })
    .catch(function(err) {
        console.log(err);
    });
});

如果需要，這是我的systemjs配置：

(function(global) {

// map tells the System loader where to look for things
var map = {
    'app' : 'assets/app/auth',
    '@angular': 'node_modules/@angular',
    'ng2-translate': 'node_modules/ng2-translate',
    'rxjs': 'node_modules/rxjs', // added this map section
    'primeng': 'node_modules/primeng',
    'angular2-recaptcha': 'node_modules/angular2-recaptcha'
};

// packages tells the System loader how to load when no filename and/or no extension
var packages = {
    'app': { main: 'assets/app/auth/main.js',  defaultExtension: 'js'},
    'rxjs': { defaultExtension: 'js' },
    'primeng': {defaultExtension: 'js'},
    'angular2-recaptcha': {defaultExtension: 'js'}
};

var packageNames = [
    'common',
    'compiler',
    'core',
    'http',
    'forms',
    'platform-browser',
    'platform-browser-dynamic',
    'router'
];

// Individual files (~300 requests):
function packIndex(pkgName) {
    packages['@angular/'+pkgName] = { main: 'index.js', defaultExtension: 'js' };
}
// Bundled (~40 requests):
function packUmd(pkgName) {
    packages['@angular/'+pkgName] = { main: 'bundles/' + pkgName + '.umd.js', defaultExtension: 'js' };
}

// Most environments should use UMD; some (Karma) need the individual index files
var setPackageConfig = System.packageWithIndex ? packIndex : packUmd;

// Add package entries for angular packages
packageNames.forEach(setPackageConfig);

var config = {
    defaultJSExtensions: true,
    map: map,
    packages: packages
};

System.config(config);

})(this);

此問題僅在Chrome中發生。

編輯

這是角度引導文件：

import {bootstrap}    from '@angular/platform-browser-dynamic';
import {AppComponent} from './component/app.component';
import {HTTP_PROVIDERS} from '@angular/http';
import {HttpService} from '../common/service/http.service';
import {enableProdMode} from '@angular/core';
import {disableDeprecatedForms, provideForms} from '@angular/forms';
import {APP_ROUTER_PROVIDERS} from '../routes/auth.routes';
import {TRANSLATE_PROVIDERS, TranslateService, TranslatePipe, TranslateLoader, TranslateStaticLoader} from 'ng2-translate/ng2-translate';

enableProdMode();
bootstrap(AppComponent,[
    APP_ROUTER_PROVIDERS,
    HTTP_PROVIDERS,
    TRANSLATE_PROVIDERS,
    HttpService,
    disableDeprecatedForms(),
    provideForms()
]).catch(err => console.error(err));

Answer 1

我認為您將捆綁的js文件包括在index.html的頭部部分中，但是您應該將這些文件傳輸到應用程序下的主體部分。

為了在將應用程序轉移到webpack之后更加清晰，我遇到了完全相同的問題。

例如，

 <!DOCTYPE html> <html> <head> <base href=""> <title>Test</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <script src="prod/vendor.js"></script> <script src="prod/app.js"></script> </head> <body> <app-one> Loading... </app-one> </body> </html>

我這樣轉移了腳本

 <!DOCTYPE html> <html> <head> <base href=""> <title>Test</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> </head> <body> <app-one> Loading... </app-one> <script src="prod/vendor.js"></script> <script src="prod/app.js"></script> </body> </html>

Angular 2 TypeError：無法讀取null的屬性“動畫”

問題描述

1 個解決方案

解決方案1
4 2016-08-11 13:24:00

Angular 2 TypeError：無法讀取null的屬性“動畫”

問題描述

1 個解決方案

解決方案1 4 2016-08-11 13:24:00

解決方案1
4 2016-08-11 13:24:00