前端---原生JS实现分页

叁歲伎倆 2022-11-29 00:54 168阅读 0赞

<html>
    
    <head>
        <title>原生js分页插件</title>
        <style>
            /*分页样式 start*/
            #pag_li_ {
                /*分页页码 <li> 的样式*/
                display: inline-block;
                min-width: 30px;
                height: 28px;
                cursor: pointer;
                color: black;
                line-height: 28px;
                background-color: white;
                border: 1px solid rgba(217, 217, 217, 1);
                text-align: center;
                margin: 0 4px;
                border-radius: 3px;
            }
    
            #pag_li_:hover {
                /*悬停样式*/
                background-color: #D1A85F;
                border-color: #D1A85F;
                color: #FFF
            }
    
            li.xl-disabled:hover {
                /*省略的页码按钮 ...按钮*/
                background-color: #f9f9f9 !important;
                border: 1px solid #dce0e0 !important;
                color: #666 !important;
            }
    
            li.xl-jumpText:hover {
                background-color: rgba(0, 0, 0, 0) !important;
                border-color: rgba(0, 0, 0, 0) !important;
            }
    
            #xlJumpNum {
                width: 50px;
                border-radius: 4px;
                border: 1px solid rgba(217, 217, 217, 1);
                height: 27px;
                text-align: center;
                outline: none;
            }
    
            input::-webkit-outer-spin-button,
            input::-webkit-inner-spin-button {
                -webkit-appearance: none !important;
            }
    
            input[type="number"] {
                -moz-appearance: textfield;
            }
    
            /*分页样式 end*/
        </style>
    </head>
    
    <body>
        
        <div id="pageSea"></div>
    
        
        <div id="pageSea2"></div>
    </body>
    
    </html>
    <script>
        var Paging = (function () {
            function Paging(elementName, options) {
                this.elementName = elementName;
                this.options = options;
                options.nowPage = options.nowPage >= 1 ? options.nowPage : 1;
                options.pageNum = options.pageNum > 0 ? options.pageNum : 0;
                options.canJump = options.canJump || 0;
                options.showOne = options.showOne || 0;
                options.buttonNum = (options.buttonNum >= 5 ? options.buttonNum : 5) || 7;
                this.nowPage = options.nowPage > options.pageNum ? options.pageNum : options.nowPage;
                this.pageNum = options.pageNum < 0 ? 0 : options.pageNum;
                this.canJump = options.canJump;
                this.showOne = options.showOne;
                this.buttonNum = options.buttonNum;
                this.callback = options.callback;
                this.element = document.getElementById(elementName);
                this.init();
            }
            Paging.prototype.init = function () {
                this.createHtml();
            };
            Paging.prototype.createHtml = function () {
                var _this = this;
                var content = [];
                //如果pageNum小于等于0则不渲染
                if (this.pageNum <= 0) {
                    return '';
                }
                //如果只有一页并且设置为不显示，则不进行渲染
                if (!this.showOne && this.pageNum === 1) {
                    this.element.innerHTML = '';
                    return '';
                }
                content.push("<ul>");
                content.push("<li id='pag_li_' class='xl-prevPage'><</li>");
                //页面总数小于等于当前要展示页数总数，展示所有页面
                if (this.pageNum <= this.buttonNum) {
                    for (var i = 1; i <= this.pageNum; i++) {
                        if (this.nowPage !== i) {
                            content.push("<li id='pag_li_'>" + i + "</li>");
                        }
                        else {
                            content.push("<li id='pag_li_' class='xl-active' style='background-color: #D1A85F;border-color: #D1A85F;color: #FFF;'>" + i + "</li>");
                        }
                    }
                }
                else if (this.nowPage <= Math.floor(this.buttonNum / 2)) {
                    //当前页面小于等于展示页数总数的一半（向下取整），从1开始
                    for (var i = 1; i <= this.buttonNum - 2; i++) {
                        if (this.nowPage !== i) {
                            content.push("<li id='pag_li_'>" + i + "</li>");
                        }
                        else {
                            content.push("<li id='pag_li_' class='xl-active' style='background-color: #D1A85F;border-color: #D1A85F;color: #FFF;'>" + i + "</li>");
                        }
                    }
                    content.push("<li id='pag_li_' class='xl-disabled' style='opacity: .5;cursor: no-drop;'>...</li>");
                    content.push("<li id='pag_li_'>" + this.pageNum + "</li>");
                }
                else if (this.pageNum - this.nowPage <= Math.floor(this.buttonNum / 2)) {
                    //当前页面大于展示页数总数的一半（向下取整）
                    content.push("<li id='pag_li_'>" + 1 + "</li>");
                    content.push("<li id='pag_li_' class='xl-disabled' style='opacity: .5;cursor: no-drop;'>...</li>");
                    for (var i = this.pageNum - this.buttonNum + 3; i <= this.pageNum; i++) {
                        if (this.nowPage !== i) {
                            content.push("<li id='pag_li_'>" + i + "</li>");
                        }
                        else {
                            content.push("<li id='pag_li_' class='xl-active' style='background-color: #D1A85F;border-color: #D1A85F;color: #FFF;'>" + i + "</li>");
                        }
                    }
                }
                else {
                    //前半部分页码
                    if (this.nowPage - Math.floor(this.buttonNum / 2) <= 0) {
                        for (var i = 1; i <= Math.floor(this.buttonNum / 2); i++) {
                            if (this.nowPage !== i) {
                                content.push("<li id='pag_li_'>" + i + "</li>");
                            }
                            else {
                                content.push("<li id='pag_li_' class='xl-active' style='background-color: #D1A85F;border-color: #D1A85F;color: #FFF;'>" + i + "</li>");
                            }
                        }
                    }
                    else {
                        content.push("<li id='pag_li_'>" + 1 + "</li>");
                        content.push("<li id='pag_li_' class='xl-disabled' style='opacity: .5;cursor: no-drop;'>...</li>");
                        for (var i = this.nowPage - Math.floor(this.buttonNum / 2) + (this.buttonNum % 2 == 0 ? 3 : 2); i <= this.nowPage; i++) {
                            if (this.nowPage !== i) {
                                content.push("<li id='pag_li_'>" + i + "</li>");
                            }
                            else {
                                content.push("<li id='pag_li_' class='xl-active' style='background-color: #D1A85F;border-color: #D1A85F;color: #FFF;'>" + i + "</li>");
                            }
                        }
                    }
                    //后半部分页码
                    if (this.pageNum - this.nowPage <= 0) {
                        for (var i = this.nowPage + 1; i <= this.pageNum; i++) {
                            content.push("<li id='pag_li_'>" + i + "</li>");
                        }
                    }
                    else {
                        for (var i = this.nowPage + 1; i <= this.nowPage + Math.floor(this.buttonNum / 2) - 2; i++) {
                            content.push("<li id='pag_li_'>" + i + "</li>");
                        }
                        content.push("<li id='pag_li_' class='xl-disabled' style='opacity: .5;cursor: no-drop;'>...</li>");
                        content.push("<li id='pag_li_'>" + this.pageNum + "</li>");
                    }
                }
                content.push("<li id='pag_li_' class='xl-nextPage'>></li>");
                if (this.canJump) {
                    content.push("<li id='pag_li_' class='xl-jumpText xl-disabled' style='opacity: .5;cursor: no-drop;background-color: rgba(0, 0, 0, 0);border-color: rgba(0, 0, 0, 0);opacity: 1;'>共" + this.pageNum + "页<input type='number' id='xlJumpNum'>页</li>");
                    content.push("<li id='pag_li_' class='xl-jumpButton' style='padding: 0 5px;'>跳转</li>");
                }
                content.push("</ul>");
                this.element.innerHTML = content.join('');
                this.element.setAttribute('style', 'margin:20px auto;color:#666;text-align:center;');
                // DOM重新生成后每次调用是否禁用button
                setTimeout(function () {
                    _this.disabled();
                    _this.bindClickEvent();
                }, 20);
            };
            Paging.prototype.bindClickEvent = function () {
                var _this = this;
                var liList = this.element.children[0].children;
                var _loop_1 = function (i) {
                    liList[i].removeEventListener('click', function () {
                        _this.clickEvent(liList[i]);
                    });
                };
                for (var i = 0; i < liList.length; i++) {
                    _loop_1(i);
                }
                var _loop_2 = function (i) {
                    liList[i].addEventListener('click', function () {
                        _this.clickEvent(liList[i]);
                    });
                };
                for (var i = 0; i < liList.length; i++) {
                    _loop_2(i);
                }
            };
            Paging.prototype.clickEvent = function (li) {   //点击事件
                var cla = li.className;
                var num = parseInt(li.innerHTML);
                var nowPage = this.nowPage;
                if (li.className.indexOf('xl-disabled') !== -1 || cla === 'xl-jumpText') {
                    return '';
                }
                if (cla === 'xl-prevPage') { //点击上一页
                    if (nowPage >= 1) {
                        this.nowPage -= 1;
                    }
                }
                else if (cla === 'xl-nextPage') { //点击下一页
                    if (nowPage < this.pageNum) {
                        this.nowPage += 1;
                    }
                }
                else if (cla === 'xl-jumpButton') { //点击跳转按钮
                    var el = document.getElementById('xlJumpNum');//获取页码输入框的值
                    //没有输入正整数 或 大于总页数 或小于0
                    if (!(/(^[1-9]\d*$)/.test(Number(el.value))) || Number(el.value) > this.pageNum || Number(el.value) <= 0) {
                        alert('请输入合法的页码！');
                        el.value = ''; //清空页码输入框
                        return false;
                    } else {
                        this.nowPage = Number(el.value);
                    }
                } else {
                    this.nowPage = num;
                }
                this.createHtml();
                if (this.callback) {
                    this.callback(this.nowPage);    //回调
                }
            };
            Paging.prototype.disabled = function () {
                var nowPage = this.nowPage;
                var pageNum = this.pageNum;
                var liList = this.element.children[0].children;
                if (nowPage === 1) {
                    for (var i = 0; i < liList.length; i++) {
                        if (liList[i].className.indexOf('xl-prevPage') !== -1) {
                            liList[i].setAttribute('class', liList[i].getAttribute('class').concat(' xl-disabled'));
                        }
                    }
                }
                else if (nowPage === pageNum) {
                    for (var i = 0; i < liList.length; i++) {
                        if (liList[i].className.indexOf('xl-nextPage') !== -1) {
                            liList[i].setAttribute('class', liList[i].getAttribute('class').concat(' xl-disabled'));
                        }
                    }
                }
            };
            return Paging;
        }());
    
    
    
        new Paging('pageSea', {
            nowPage: 1,                 // 当前页
            pageNum: 12,                // 总页数
            buttonNum: 7,               // 要展示的页码数量
            canJump: 1,                 // 是否显示跳转功能跳转  0(默认):不显示    1:显示
            showOne: 0,                 // 只有一页时，是否显示  0:不显示     1(默认):显示
            callback: function (cpage) { //回调函数
                alert(cpage);
            }
        })
    
    
        new Paging('pageSea2', {
            nowPage: 1,                 // 当前页
            pageNum: 24,                // 总页数
            buttonNum: 7,               // 要展示的页码数量
            canJump: 0,                 // 是否显示跳转功能跳转  0(默认):不显示    1:显示
            showOne: 0,                 // 只有一页时，是否显示  0:不显示     1(默认):显示
            callback: function (cpage) { //回调函数
                alert(cpage);
            }
        })
    </script>

![20200915181821705.png][]

[20200915181821705.png]: /images/20221124/be848834acea4ae582b6d0c89ef4f5b4.png