ES6字符串新增功能-判断字符串开头及结尾

    //startsWith    判断以什么字符串开头
    //endsWith      判断以什么字符串结尾
    let url = "https://www.lmonkey.com";

    if(url.startsWith("https")) {
        console.log(url);
    }else{
        console.log("不是以https开头的");
    }
    if(url.endsWith('cn')) {
        console.log(url);
    }else{
        console.log("不是以.cn结尾的URL");
    }