HTML5历史管理

时间:2024-09-19 10:35:44

边看视频边做的练习,随机显示数字,分别使用history和hash来实现历史管理

<!doctype html>
<html>
<head>
    <meta charset="utf-8" >
    <title>随机显示数字</title>
    <style type="text/css">
        *{
            padding: 0;
            margin: 0;
        }
        #btn1,#div1{
            margin: 10px;
        }
    </style>
</head>
<body>
    <input type="button" value="请随机选择" id="btn1" />
    <div id="div1"></div>
    <script type="text/javascript">
    // history,需在服务器下运行
    window.onload = function(){
        var oBtn1 = document.getElementById('btn1');
        var oDiv1 = document.getElementById('div1');

        oBtn1.onclick = function(){

            var arr = randomNum(35,7);

                history.pushState(arr,'',arr); // 三个参数,数据、标题(没有效果)、地址(可选)

                oDiv.innnerHTML = arr; 

            }

            window.onpopstate = function(ev){
                oDiv.innnerHTML = ev.state; // popstate事件,读取数据 event.state
            }

            function randomNum(iAll,iNow){
                var arr = [];
                var newArr = [];

                for(var i=1;i<=iAll;i++){
                    arr.push(i);
                }

                for(var i=0; i<iNow; i++){
                    newArr.push( arr.splice(Math.floor(Math.random()*arr.length),1));
                }

                return newArr;
            }

        }

        //onhashchange通过改变hash值来管理
        window.onload = function(){
            var oBtn1 = document.getElementById('btn1');
            var oDiv1 = document.getElementById('div1');
            //var json = {};

            oBtn1.onclick = function(){

                var arr = randomNum(35,7);
                var num = Math.random();
                json[num] = arr;
                oDiv1.innerHTML = arr;
                window.location.hash = num;

            }

            window.onhashchange = function(){
                oDiv1.innerHTML = json[window.location.hash.substring(1)];
            }

            function randomNum(iAll,iNow){
                var arr = [];
                var newArr = [];

                for(var i=1;i<=iAll;i++){
                    arr.push(i);
                }

                for(var i=0; i<iNow; i++){
                    newArr.push( arr.splice(Math.floor(Math.random()*arr.length),1));
                }

                return newArr;
            }

        }
    </script>
</body>
</html>