我正在尝试在我的项目中实现recaptcha,但我不确定如何使用它。
我以这种方式导入脚本:
public loadScript() {
let body = <HTMLDivElement>document.body;
let script = document.createElement('script');
script.innerHTML = '';
script.src = 'https://www.google.com/recaptcha/api.js';
script.async = true;
script.defer = true;
body.appendChild(script);
}
然后我在组件构造函数中调用此函数,它工作 - recaptcha正确呈现并工作,但如何从我的后端获得响应?
我尝试了grecaptcha.getResponse()
,但我得到ReferenceError: "grecaptcha is not defined"
- 有趣的并不总是。那么如何让打字稿知道grecaptcha是什么?
要在Angular 4,5,6中使用Google reCAPTCHA v3,请按照简单的步骤操作
现在在角度项目index.html中添加以下脚本文件
<script src='https://www.google.com/recaptcha/api.js'></script>
然后在要使用Captcha的Component文件中添加以下标记
<div class="form-group">
<div id="captcha_element" class="g-recaptcha"
[attr.data-sitekey]="siteKeyCaptcha"></div>
</div>
现在使用以下代码更新您的Typescript文件。
declare var grecaptcha: any;
//declare Varible with public key given by Google
siteKeyCaptcha: string = "6LdF6xxxxxxxxxxxxxxxxxxxxxxxxxxxWVT";
//when we route back from the page we have to render captcha again
grecaptcha.render('capcha_element', {
'sitekey': this.siteKeyCaptcha
});
要获取Captcha的响应,请在HTML中单击添加回调事件,如下所示
**HTML**
<div class="form-group">
<div id="capcha_element" class="g-recaptcha"
data-callback="getResponceCapcha" [attr.data-sitekey]="siteKeyCaptcha"></div>
</div>
**Typescript**
ngOnInit() {
//....rest of code....
window['getResponceCapcha'] = this.getResponceCapcha.bind(this);
}
getResponceCapcha(captchaResponse: string) {
this.verifyCaptcha(captchaResponse);
}
verifyCaptcha(captchaResponse: string) {
//you can do HTTP call from here
}