Javascript 更改ReCaptcha语言OnClick

我意识到，通过在api.js中添加“hl”选项来更改Recaptcha语言是很简单的

https://www.google.com/recaptcha/api.js?hl=fr

我想做的是，当有人单击通过查询字符串参数（如“？lang=fr”）公开的语言选择器时，更改Recaptcha语言。我有js将解析参数，但我似乎无法在head标记中重新加载脚本以包含参数

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我已经看过了所有的条件IF…ELSE javascript加载文章。有没有办法在版本2中加载Recaptcha选项？

我认为目前不可能通过javascript直接设置Recaptcha语言。如您所述，在脚本加载期间使用参数“hl”是可能的

如果您需要在不重新加载页面的情况下动态更改应用程序的语言，可以通过从head部分删除recaptcha脚本链接，而直接通过javascript调用来加载。当您的用户通过单击按钮更改语言时，您现在可以通过再次调用load函数用新语言重新加载recaptcha

在我的例子中，recaptcha元素显示在一个模式中，用户响应通过ajax发送到服务器，并在服务器端针对Google进行验证。 像这样的东西会起作用：

/* Clears recaptcha HTML element of all content, clears 
 * recaptcha element id so that the code would know to create 
 * the new HTML. Reloads recaptcha code with the new specified 
 * language using jQuery */
var captchaReload = function(langCode) {
    $('#recaptchaDiv').empty();
    recaptchaElement = null;
    var url = "https://www.google.com/recaptcha/api.js?render=explicit&hl=" + langCode;
    $.getScript(url);
};

/* Called by recaptcha when the user solves the puzzle.
 * The incoming parameter 'response' is generated by the recaptcha 
 * and needs to be validated against google separately, which 
 * is not shown here */
var captchaValidate = function(response){
    console.log('Doing captcha response: ' + response);
    grecaptcha.reset();
    $('#captchaModal').modal('hide');
    // TODO: Add server side call for validating the client response
};

/* Variable for keeping track if recaptcha has already been created */
var recaptchaElement = null;

/* Called for initializing the recaptcha element and opening the modal */
var captchaShow = function () {
    // Initialize recaptcha if it is not present yet
    if(recaptchaElement === null){
        recaptchaElement = grecaptcha.render('recaptchaDiv', {
            'sitekey'   : 'YoUrReCaPtChAsItEkEy',
            'theme'     : 'light',
            'callback'  : captchaValidate
        });
    }
    // Open captcha modal
    window.setTimeout(function() {
        $('#captchaModal').modal('show');
    },300);
};

现在，在页面加载或用户选择新语言时，您可以执行以下操作：

captchaReload('fr');

它应该从页面中删除现有的recaptcha对象，并用正确的语言重新加载一个对象。之后，您可以使用以下命令打开模式：

captchaShow();

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简单解决方案

您可以这样做：

HTML

<div id="captcha_container"></div>
<select id="ddllanguageListsGoogleCaptcha"></select>
<input id="btnApplyLanguage" type="button" value="Apply Selected Language" />

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您需要重新加载页面或销毁新页面中的html元素和脚本才能执行此操作。注意一个错误，该错误表示reCaptcha ID或reCaptcha容器必须为空。非常好。谢谢

// Button for updating captcha language
$('#btnApplyLanguage').click(function () {
    updateGoogleCaptchaLanguage($('#ddllanguageListsGoogleCaptcha').val());
});

// Update language captcha 
function updateGoogleCaptchaLanguage(selectedLanguage) {

    // Get GoogleCaptcha iframe
    var iframeGoogleCaptcha = $('#captcha_container').find('iframe');

    // Get language code from iframe
    var language = iframeGoogleCaptcha.attr("src").match(/hl=(.*?)&/).pop();

    // Get selected language code from drop down
    var selectedLanguage = $('#ddllanguageListsGoogleCaptcha').val();

    // Check if language code of element is not equal by selected language, we need to set new language code
    if (language !== selectedLanguage) {
        // For setting new language 
        iframeGoogleCaptcha.attr("src", iframeGoogleCaptcha.attr("src").replace(/hl=(.*?)&/, 'hl=' + selectedLanguage + '&'));
    }
}