// Features specially written for demo

(function() {

    // language
    function language(params) {
        
        var lang = navigator.language||navigator.userLanguage;//常规浏览器语言和IE浏览器
        lang = lang.substr(0, 2);//截取lang前2位字符

        return lang;

    }
    // Tencent Forum Link Button
    function supportButton() {
        const text = language() === 'zh' ? '反馈' : 'Forum';

        document.querySelector("body").insertAdjacentHTML('beforeend', `<a id="container" href="https://support.qq.com/product/288322" target="_blank" style="z-index:2;width:50px;height:50px;line-height:50px;position:fixed;right:40px;bottom:86px;border-radius:50px;cursor:pointer;background:rgb(71,133,249);color:#fff;text-align:center;text-decoration:none;">${text}</a>`);
    }
    
    supportButton()
    
})()