原生js实现分页效果

本文实例为大家分享了js实现分页效果的具体代码，供大家参考，具体内容如下

效果如下：

代码：

page.js

var pageNation;
pageNation = (function () {
 function extend(target, source) {
  for (var obj in source) {
   target[obj] = source[obj];
  }
  return target;
 }
 function pageNation(options) {
  var defaultOptions = {
   el: "body",//分页父容器 
   page: 1,
   size: 10,
   total: 0,
   styUrl: 'style.css',
   callback: null,
   IsShowBtn: {//设置需要显示的按钮
    choosePageSize: true,//是否显示下拉选项
    IsShowPrevOrNextBtn: true,//否显示上一页下一页按钮
    IsShowEnterBtn: true,//是否显示跳转输入
    IsShowTotalPage:true,//是否显示总页数
   }
  };
  this.options = extend(defaultOptions, options) || {};
  this.options.el = document.querySelectorAll(this.options.el)[0];
  this.pageT = Math.ceil(this.options.total / this.options.size);
  this.init();
  if (!document.querySelector("#dynamic-style")) {
   this.pageStyle();
  }
  //this.options.callback(1,self.options.size,self.options.total); 
 }

 var proto = pageNation.prototype || {};
 proto.rander = function (page, size, total) {
  this.options.page = !!page ? page : 1;
  this.options.size = !!size ? size : 10;
  this.options.total = !!total ? total : 0;// 
  this.pageT = Math.ceil(this.options.total / this.options.size);
  this.init();
  this.page_nation = null;
 };
 proto.init = function () {
  var self = this;
  var pageNum = function (page) {//创建分页器 
   return (function () {
    let ol = document.createElement("ol");
    ol.classList.add("page-ol");
    let p = !!page ? page : 1;
    let tPage = Math.ceil(self.options.total / self.options.size);
    let s = p <= 3 ? 1 : p > (tPage - 3) ? tPage - 4 : p - 2;
  s=s==0?1:s;
    for (let i = s; i < (s + 5); i++) {
     if (i > tPage) {
      break;
     }
     let li = document.createElement("li");
     li.innerText = i;
     if (i == p) {
      li.classList.add("hover");
     }
     ol.appendChild(li);
    }
    return ol;
   })(page);
  };
  var sizeNum = function (size) {//重置size 
   return (function () {
    let select = document.createElement("select");
    select.setAttribute("class", "page-Select");
    let s = !!size ? size : 10;
    //let tPage=Math.ceil(self.options.total/self.options.size); 
    for (let i = 5; i <= (5 * 4); i += 5) {
     let option = document.createElement("option");
     option.value = i;
     option.innerText = i;
     if (i === self.options.size) {
      option.setAttribute("selected", "selected");
     }
     select.appendChild(option);
    }
    return select;
   })(size);
  };
  var prevBtn = function () {//上一页按钮 
   return (function () {
    let button = document.createElement("span");
    button.setAttribute("class", "prev-btn");
    button.innerText = "上一页";
    if (self.options.page == 1) {
     button.classList.add("disabled")
    };
    return button;
   })();
  };
  var nextBtn = function () {//下一页按钮 
   return (function () {
    let button = document.createElement("span");
    button.setAttribute("class", "next-btn");
    button.innerText = "下一页";
    if (self.options.page == self.pageT) {
     button.classList.add("disabled")
    }
    ;
    return button;
   })();
  };
  var pageMark = function () {//页码标识 
   return (function () {
    let span = document.createElement("span");
    span.setAttribute("class", "pageMark");
    span.innerHTML = "" + self.options.page + " / " + Math.ceil(self.options.total / self.options.size) + "";
    return span;
   })();
  };
  var enterBtn = function () {//跳转按钮 
   return (function () {
    let button = document.createElement("span");
    button.setAttribute("class", "enter-btn");
    let ipt = document.createElement("input");
    ipt.value = self.options.page;
    ipt.setAttribute("type", "text");

    let b = document.createElement("span");
    b.setAttribute("class", "enterBtn");
    b.innerText = "跳转";

    button.appendChild(ipt);
    button.appendChild(b);

    return button;
   })();
  };
  let page_nation = self.options.el.querySelector(".page-nation");
  if (page_nation != null && page_nation != "undefind") {
   page_nation.innerHTML = "";
  }
  else {
   page_nation = document.createElement("div");
   page_nation.classList.add("page-nation");
   self.options.el.appendChild(page_nation);
  }
  page_nation.appendChild(new pageNum(self.options.page));
  self.options.IsShowBtn.choosePageSize&&page_nation.appendChild(new sizeNum(self.options.size));
  self.options.IsShowBtn.IsShowPrevOrNextBtn&&page_nation.appendChild(new prevBtn());
  self.options.IsShowBtn.IsShowPrevOrNextBtn&&page_nation.appendChild(new nextBtn());
  page_nation.appendChild(new pageMark());
  self.options.IsShowBtn.IsShowEnterBtn&&page_nation.appendChild(new enterBtn());

  self.page_nation = document.querySelector(".page-nation");

  this.switchPage(self.options.callback);
  this.switchSize(self.options.callback);
  return self;
 };
 proto.pageStyle = function () {
  let headDoc = document.querySelector("head");
  var linkTag = document.createElement("link");
  var cssURL = this.options.styUrl;
  linkTag.id = 'dynamic-style';
  linkTag.href = cssURL;
  linkTag.setAttribute('rel', 'stylesheet');
  linkTag.setAttribute('media', 'all');
  linkTag.setAttribute('type', 'text/css');
  headDoc.appendChild(linkTag);
 };
 proto.switchPage = function (fun) {
  let self = this;
  let lis = this.page_nation.children[0].children;
  for (let i = 0, len = lis.length; i < len; i++) {
   lis[i].onclick = function () {
    self.options.page = this.innerText;
    self.rander(self.options.page, self.options.size, self.options.total);
   };
  }
  this.options.el.querySelectorAll(".prev-btn")[0].onclick = function (e) {
   //console.time("rr"); 
   self.options.page = --self.options.page;
   self.rander(self.options.page, self.options.size, self.options.total);
   //console.timeEnd("rr"); 
  };
  this.options.el.querySelectorAll(".next-btn")[0].onclick = function (e) {
   self.options.page = ++self.options.page;
   self.rander(self.options.page, self.options.size, self.options.total);
  };
  this.options.el.querySelectorAll(".enterBtn")[0].onclick = function (e) {
   let val = this.previousElementSibling.value;
   if (!val || val > self.pageT || val < 1) {
    alert("参数超出范围！");
    return false;
   } else {
    self.options.page = val;
    self.rander(self.options.page, self.options.size, self.options.total);
   }
  };
  fun(self.options.page, self.options.size, self.options.total);
 };
 proto.switchSize = function (fun) {
  let self = this;
  let lis = this.page_nation.children[1];
  lis.onchange = function () {
   self.options.size = Number(this.value);
   self.rander(1, self.options.size, self.options.total);
   fun(1, self.options.size, self.options.total);
  }
 };
 return pageNation;
})(); 

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。