JS實現前端動態分頁碼程式碼例項
阿新 • • 發佈:2020-06-04
思路分析:有3種情況
第一種情況,當前頁面curPage < 4
第二種情況,當前頁面curPage == 4
第三種情況,當前頁面curPage>4
此外,還要考慮,當前頁碼 curPage < pageTotal(總頁碼)-2,才顯示 ...
首先,先是前端的佈局樣式
<body> /*首先,在body中新增div id="pagination" */ <div id="pagination"> <!-- 後面會在JS中動態追加 ,此處為了,實現前端效果,所以註冊 <a id="prevBtn"><</a> <a id="first">1</a> <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >2</a> <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >3</a> <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >4</a> <span>...</span> <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" id="last">10</a> <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" id="nextBtn">></a> --> </div> </body>
其次,是css程式碼
*{ margin: 0; padding: 0; } #pagination{ width: 500px; height: 100px; border: 2px solid crimson; margin: 50px auto ; padding-top: 50px ; padding-left: 50px; } .over,.pageItem{ float: left; display: block; width: 35px; height: 35px; line-height: 35px; text-align: center; } .pageItem{ border: 1px solid orangered; text-decoration: none; color: dimgrey; margin-right: -1px;/*解決邊框加粗問題*/ } .pageItem:hover{ background-color: #f98e4594; color:orangered ; } .clearfix{ clear: both; } .active{ background-color: #f98e4594; color:orangered ; } .banBtn{ border:1px solid #ff980069; color: #ff980069; } #prevBtn{ margin-right: 10px; } #nextBtn{ margin-left: 10px; }
JavaScript程式碼
<script type="text/javascript"> var pageOptions = {pageTotal:10,curPage:7,paginationId:''}; dynamicPagingFunc(pageOptions); function dynamicPagingFunc(pageOptions){ var pageTotal = pageOptions.pageTotal || 1; var curPage = pageOptions.curPage||1; var doc = document; var paginationId = doc.getElementById(''+pageOptions.paginationId+'') || doc.getElementById('pagination'); var html = ''; if(curPage>pageTotal){ curPage =1; } /*總頁數小於5,全部顯示*/ if(pageTotal<=5){ html = appendItem(pageTotal,curPage,html); paginationId.innerHTML = html; } /*總頁數大於5時,要分析當前頁*/ if(pageTotal>5){ if(curPage<=4){ html = appendItem(pageTotal,html); paginationId.innerHTML = html; }else if(curPage>4){ html = appendItem(pageTotal,html); paginationId.innerHTML = html; } } } function appendItem(pageTotal,html){ var starPage = 0; var endPage = 0; html+='<a id="prevBtn"><</a>'; if(pageTotal<=5){ starPage = 1; endPage = pageTotal; }else if(pageTotal>5 && curPage<=4){ starPage = 1; endPage = 4; if(curPage==4){ endPage = 5; } }else{ if(pageTotal==curPage){ starPage = curPage-3; endPage = curPage; }else{ starPage = curPage-2; endPage = curPage+1; } html += '<a id="first">1</a><span>...</span>'; } for(let i = starPage;i <= endPage;i++){ if(i==curPage){ html += '<a id="first">'+i+'</a>'; }else{ html += '<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >'+i+'</a>'; } } if(pageTotal<=5){ html+='<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" id="nextBtn">></a>'; }else{ if(curPage<pageTotal-2){ html += '<span>...</span>'; } if(curPage<=pageTotal-2){ html += '<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >'+pageTotal+'</a>'; } html+='<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" id="nextBtn">></a>'; } return html; } </script>
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