1、字符串模板

             var str = "hello";
        var age = 18;
        console.log("world"+str)
        /* ``字符串模板,可以在字符串中插入变量${} */
        var sum = `world${str}`;

例子

<script>
        var arr = [
            { 
                imgUrl:"https://img.alicdn.com/imgextra/i2/16049769/O1CN01sJVfBd2M2FsOCQsl1_!!0-saturn_solar.jpg_468x468q75.jpg_.webp",
                name:"cheng",
                age:19
            },{
                imgUrl:"https://img9.doubanio.com/view/photo/s_ratio_poster/public/p2680748636.webp",
                name:"lisi",
                age:18
            }
        ]
        for(var i=0;i<arr.length;i++){
            var {imgUrl,name,age}= arr[i];
            var template = 
            `
            <div class="item">
                <p>${name}</p>
                <img src="${imgUrl}"/>
                <p>${age}</p>
            </div>
            `
            console.log(template)
            $("body").prepend(template)
        }
    </script>