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翻页.html
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翻页.html
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<!DOCTYPE html>
<html>
<head>
<title>实现简单的一页展示多条数据左右翻页功能</title>
</head>
<body>
<div class="container">
<button type="button" onclick="moveLeft(-1)">左翻页</button>
<button type="button" onclick="moveLeft(1)">右翻页</button>
</div>
<script>
var arr = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18];
var flag = 0;
const NUM = 6;
function moveLeft(a){
var newArr = [];
//如果是向左滑动，首先判断标志位flag是否小于等于0
if(a == -1){
//如果标志位为0，则表示不能向右滑动，把flag标志位置位0
if(flag <= 0){
flag = 0;
newArr = arr.slice(flag*NUM,flag*NUM+NUM);
}else{
flag = flag - 1;
console.log(flag);
newArr = arr.slice(flag*NUM,flag*NUM+NUM);
}
}else{//如果向右滑动，则需要判断上限
/*debugger;*/
//首先判断是不是NUM的整数倍
//如果是NUM的整数倍
if(arr.length % NUM == 0){
//如果flag大于等于arr.length/NUM-1，把flag置为arr.length/NUM-1
if(flag >= arr.length/NUM-1){
flag = arr.length/NUM-1;
newArr = arr.slice(flag*NUM,flag*NUM+NUM);
}else{//如果flag小于arr.length/NUM-1
flag = flag + 1;
console.log(flag);
newArr = arr.slice(flag*NUM,flag*NUM+NUM);
}
}else{//如果不是NUM的整数倍
//如果flag大于等于Math.floor(arr.length/NUM),把flag置为Math.floor(arr.length/NUM)
if(flag >= Math.floor(arr.length/NUM)){
flag = Math.floor(arr.length/NUM);
newArr = arr.slice(flag*NUM,flag*NUM+NUM);
}else{//如果flag小于Math.floor(arr.length/NUM)
flag = flag + 1;
newArr = arr.slice(flag*NUM,flag*NUM+NUM);
}
}
}
console.log(newArr);
return newArr;
}
</script>
</body>
</html>