javascript – 谷歌登录与angular2和打字稿 – 在哪里得到gapi?
作者:互联网
我想通过以下问题尝试使用带有angular2的谷歌登录:Google Sign-In for Websites and Angular 2 using Typescript
但我收到一个错误:
ORIGINAL EXCEPTION: ReferenceError: gapi is not defined
ORIGINAL STACKTRACE:
ReferenceError: gapi is not defined
at LoginAppComponent.ngAfterViewInit (http://localhost:3000/app/login.component.js:33:9)
at DebugAppView._View_AppComponent0.detectChangesInternal (AppComponent.template.js:46:68)
at DebugAppView.AppView.detectChanges (http://localhost:3000/node_modules/@angular/core//bundles/core.umd.js:12143:18)
at DebugAppView.detectChanges (http://localhost:3000/node_modules/@angular/core//bundles/core.umd.js:12247:48)
at DebugAppView.AppView.detectViewChildrenChanges (http://localhost:3000/node_modules/@angular/core//bundles/core.umd.js:12169:23)
at DebugAppView.AppView.detectChangesInternal (http://localhost:3000/node_modules/@angular/core//bundles/core.umd.js:12154:18)
at DebugAppView.AppView.detectChanges (http://localhost:3000/node_modules/@angular/core//bundles/core.umd.js:12143:18)
at DebugAppView.detectChanges (http://localhost:3000/node_modules/@angular/core//bundles/core.umd.js:12247:48)
at ViewRef_.detectChanges (http://localhost:3000/node_modules/@angular/core//bundles/core.umd.js:10397:69)
at eval (http://localhost:3000/node_modules/@angular/core//bundles/core.umd.js:9911:88)
显然gapi没有定义 – 我可以理解,因为我似乎只是声明一个空的变量.
我目前的代码如下:
import {Component, NgZone} from "@angular/core";
declare var gapi: any;
@Component({
selector: "login",
templateUrl: "templates/login-template.html"
})
export class LoginAppComponent {
googleLoginButtonId = "google-login-button";
userAuthToken = null;
userDisplayName = "empty";
constructor(private _zone: NgZone) {
console.log(this);
}
// Angular hook that allows for interaction with elements inserted by the
// rendering of a view.
ngAfterViewInit() {
// Converts the Google login button stub to an actual button.
gapi.signin2.render(
this.googleLoginButtonId,
{
"onSuccess": this.onGoogleLoginSuccess,
"scope": "profile",
"theme": "dark"
});
}
// Triggered after a user successfully logs in using the Google external
// login provider.
onGoogleLoginSuccess = (loggedInUser) => {
this._zone.run(() => {
this.userAuthToken = loggedInUser.getAuthResponse().id_token;
this.userDisplayName = loggedInUser.getBasicProfile().getName();
});
}
}
模板加载很好,它只是gapi位.
所以我的问题是:我错过了什么?我如何定义gapi才能工作?
这是我的主要app.component代码:
import { Component } from '@angular/core';
import { LoginAppComponent } from './login.component'
@Component({
selector: 'my-app',
template: `<script src="https://apis.google.com/js/platform.js?onload=onLoadCallback" async defer></script>
<script>
window.onLoadCallback = function(){
gapi.auth2.init({
client_id: 'filler_text_for_client_id.apps.googleusercontent.com'
});
}
</script>
<h1>Angular2 P.O.C.</h1>
<login></login>`,
directives: [LoginAppComponent]
})
export class AppComponent { }
解决方法:
您是否已加入Google平台API脚本?
<script src="https://apis.google.com/js/platform.js"></script>
有关如何在执行代码之前等待加载GAPI脚本的说明,请参见this question.
标签:javascript,angular,typescript,gapi 来源: https://codeday.me/bug/20191006/1860278.html