<html>
    <head>
        <meta charset=utf-8>
    </head>
    <body>
        <ul></ul>
    </body>
    <script type="text/javascript">
        function createLi(array){
            // 补全代码
            /*
                需求：创建li元素
                1.先拿到ul的dom结构
                2.然后根据array.length循环创建一个li元素
                3.插入到ul的dom里
            */
            var ul = document.querySelector("ul")
            for(let i=0; i<array.length; i++){
                let item = document.createElement("li")
                item.innerHTML = array[i]
                ul.appendChild(item)
            }
        }
    </script>
</html>