//ES6中字符串新的连接的方式 --->字符串模板
        let name = "小样儿",
            age = 18;
        let str = `我叫${name},今年${age}岁！`
        console.log(str);    //我叫小样儿,今年18岁！

        let str = "呵呵哒哈哈哈1额额额";
        console.log(str.includes("呵呵"));    //true

if (navigator.userAgent.includes(‘Chrome‘)) {
            console.log("是谷歌浏览器");
        } else {
            console.log("不是谷歌浏览器");
        }

{
        //检查字符串是否以XXX开头   --->string.startsWith("要检查的字符串")   返回值bool
        let urlstr = "http://www.baidu.com";
        let urlstr1 = "file:///C:/Users/xxx.html";
        console.log(urlstr.startsWith("https://"));    //false
        console.log(urlstr1.startsWith("file://"))        //true
    }
    {
        //检查字符串是否以XXX结尾   --->string.endsWith("要检查的字符串")   返回值bool
        let urlstr = "http://www.baidu.com";
        console.log(urlstr.endsWith("baidu.com"));
        let path = "111.jpg";
        console.log(path.endsWith(".png"));
    }

     //字符串重复    ---》string.repeat(次数)；
        let str = "小样儿";
        console.log(str.repeat(10));     //小样儿小样儿小样儿小样儿小样儿小样儿小样儿小样儿小样儿小样儿

//会输出十次            ---》感觉没什么用处

        let str = "Iphone";
        let padStr = "我的";
        console.log(str.padStart(str.length + padStr.length, padStr));//我的Iphone

        let iphone = "Iphone";    
        let endStr = "10";    
        console.log(iphone.padEnd(iphone.length + endStr.length, endStr));    //Iphone10