几个月前我也遇到了类似的问题。我找到了kottenator的这个Gist。
你的range函数被修改如下，其中c是当前页，m是你的pageCount。对函数的调用进行了一些修改，并且还添加了对paginate(...)函数的递归调用以在导航后重新计算标记（同时，在DOM附加函数调用时添加了一个分支，以修改分页标记，我使用了三目运算符，可能有更优雅的方法来实现这一点）。
查看这个CodePen
function range(c,m) {
var current = c || 1,
last = m,
delta = 2,
left = current - delta,
right = parseInt(current) + delta + 1,
range = [],
rangeWithEllipsis = [],
l,
t;
range.push(1);
for (var i = c - delta ; i <= c + delta ; i++) {
if (i >= left && i < right && i < m && i > 1) {
range.push(i);
}
}
range.push(m);
for (var i of range) {
if (l) {
if (i - l === 2) {
t = l+1;
rangeWithEllipsis.push(t);
} else if (i - l !== 1) {
rangeWithEllipsis.push("...");
}
}
rangeWithEllipsis.push(i);
l = i;
}
return rangeWithEllipsis;
}
这并不能完全解决你的问题，但它可以正确地分页。如果我有时间，我会尝试按照你想要的方式进行分页（这仅涉及在算法中自定义
delta、
left和
right操作，并更改你的分页下一页和分页上一页事件处理程序调用）。
编辑：我已经修改了算法，找到了
left和
right边界。你的
index.html也稍作修改。思路是通过5的倍数来计算左右边界，然后创建一个要显示的索引范围，如果差异太大，则添加省略号。这应该有效地解决了你最初的问题。
JavaScript
getFirstDigits = (t) => {
return parseInt(t.toString().slice(0,-1))
}
getLastDigit = (t) => {
return parseInt(t.toString().slice(-1))
}
isMultipleOf5 = (t) => {
return [0,5].reduce((res,curr)=>{
return res = res || curr === getLastDigit(t);
},false);
}
isBetween0and5 = (t) => {
const _t = getLastDigit(t);
return _t < 5;
}
isBetween5and9 = (t) => {
const _t = getLastDigit(t);
return _t => 5 && _t <= 9;
}
appendDigit = (t,d) => {
return parseInt(getFirstDigits(t).toString() + d.toString())
}
getSecondRightMostDigit = (t) => {
return parseInt(t.toString().slice(-2,-1))
}
incrementSecondDigit = (t) => {
return t+10;
}
getLeft = (t) => {
if(t>=10){
if(isBetween0and5(t)) return appendDigit(t,0);
else return appendDigit(t,5);
} else {
if (t<5) return 0;
else return 5;
}
}
getRight = (t) => {
if(t<5) return 5;
else if (t<10) return 10;
else if(isBetween0and5(t)) return appendDigit(t,5)
else return appendDigit(incrementSecondDigit(t),0);
}
function range(c,m) {
var current = c || 1,
last = m,
delta = 2,
left = getLeft(c),
right = getRight(c),
range = [],
rangeWithEllipsis = [],
l,
t;
var rightBoundary = right < 5 ? 5 : right;
for (var i = left ; i < rightBoundary ; ++i) {
if( i < m && i > 0) range.push(i);
}
range.push(m);
for (var i of range) {
if (l) {
if (i - l === 2) {
t = l+1;
rangeWithEllipsis.push(t);
} else if (i - l !== 1){
rangeWithEllipsis.push("...");
}
}
rangeWithEllipsis.push(i);
l = i;
}
return rangeWithEllipsis;
}
HTML/HandleBars
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Handlebars Pagination</title>
<link href="main.css" rel="stylesheet" />
<script src="jquery.min.js"></script>
<script src="handlebars.min.js"></script>
<script src="functions.js"></script>
</head>
<body class="container">
<div id="posts"></div>
<script id="pagination-template" type="text/x-handlebars-template">
<ul class="pagination">
<li class="pagination-prev"><a href="#">«</a></li>
{{#each pages}}
<li class="pagination-page" data-page="{{this}}"><a href="#">{{this}}</a></li>
{{/each}}
<li class="pagination-next"><a href="#">»</a></li>
</ul>
</script>
<script id="post-template" type="text/x-handlebars-template">
<div class="score-structural score-column2-wideright search-listings post">
<div class="score-right">
<h4>{{record_count}}</h4>
<h5 style="z-index: 1;">
<a href="#"> {{ title }} </a>
</h5>
<p style="z-index: 1;"> {{ desc }} </p>
</div>
</div>
<hr>
</script>
</body>
</html>
<script>
$(function () {
var opts = {
pageMax: 2,
postsDiv: $('#posts'),
dataUrl: "searchResult.json"
}
function loadPosts(posts) {
opts.postsDiv.empty();
posts.each(function () {
var source = $("#post-template").html();
var template = Handlebars.compile(source);
var context = {
title: this.title,
desc: this.body,
};
var html = template(context);
opts.postsDiv.append(html);
});
hidePrev();
}
function hidePrev() { $('.pagination .pagination-prev').hide(); }
function showPrev() { $('.pagination .pagination-prev').show(); }
function hideNext() { $('.pagination .pagination-next').hide(); }
function showNext() { $('.pagination .pagination-next').show(); }
function paginate(page,pageCount) {
var source = $("#pagination-template").html();
var template = Handlebars.compile(source);
var context = { pages: range(page,pageCount) };
console.log(range(page,pageCount));
var html = template(context);
var paginationTag = opts.postsDiv.parent().find(".pagination");
paginationTag.length > 0 ? paginationTag.replaceWith(html) : opts.postsDiv.before(html);
function changePage(page) {
pageItems.removeClass('active');
pageItems.filter('[data-page="' + page + '"]').addClass('active');
loadPosts(data.slice(page * opts.pageMax - opts.pageMax, page * opts.pageMax));
paginate(page,pageCount);
if (gotoPageNumber <= 1) {
hidePrev();
}
}
var pageItems = $('.pagination>li.pagination-page');
var pageItemsLastPage = $('.pagination li').length - 2;
pageItems.removeClass('active');
pageItems.filter('[data-page="' + page + '"]').addClass('active');
pageItems.on('click', function () {
getDataPageNo = this.getAttribute('data-page')
console.log(getDataPageNo)
changePage(getDataPageNo);
if (getDataPageNo == 1) {
hidePrev()
}
else if (getDataPageNo == pageItemsLastPage) {
hideNext();
}
else {
showPrev();
showNext();
}
});
$('.pagination>li.pagination-prev').on('click', function () {
gotoPageNumber = parseInt($('.pagination>li.active').attr('data-page')) - 1;
changePage(gotoPageNumber);
});
$('.pagination>li.pagination-next').on('click', function () {
gotoPageNumber = parseInt($('.pagination>li.active').attr('data-page')) + 1;
if (gotoPageNumber > pageCount) {
gotoPageNumber = 1;
showPrev();
}
changePage(gotoPageNumber);
});
}
$.ajax({
dataType: 'json',
url: opts.dataUrl,
success: function (response_json) {
data = $(response_json.records.page);
dataCount = data.length;
pageCount = Math.ceil(dataCount / opts.pageMax);
if (dataCount > opts.pageMax) {
paginate(1,pageCount);
posts = data.slice(0, opts.pageMax);
} else {
posts = data;
}
loadPosts(posts);
}
});
});
</script>
