<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<button id="btn">按钮</button>
<div id="div1">
</div>
</body>
<script>
let oBtn = document.getElementById('btn');
let oDiv = document.getElementById ('div1' );
let obj = {};
let iNow = 1;
oBtn.onclick = function(){
var number = randomNum(35,7);
oDiv.innerHTML = number;
window.history.pushState( null ,'',iNow++); // Note that it must be in the server environment, otherwise an error will be reported
}
window.onpopstate = function(ev){
var number = ev.state || '';
oDiv.innerHTML = number;
}
function randomNum (alls, now) {
var arr = [];
var newArr = [];
for ( var i = 1; i <= alls; i ++ ) {
arr.push(i);
}
for(var i=0;i<now;i++){
newArr.push(arr.splice(Math.floor(Math.random()*arr.length),1));
}
return newArr;
}
</script>
</html>