Utilisez JS natif pour implémenter les compétences d'effets de couche contextuelle_javascript

创建遮罩层

复制代码 代码如下 :

  _createCover : fonction() {
      var newMask = document.createElement("div");
      newMask.id = this._mark;
      newMask.style.position = "absolu";
      newMask.style.zIndex = "100";
      _scrollWidth = Math.max(document.body.scrollWidth,document.documentElement.scrollWidth);
      _scrollHeight = Math.max(document.body.scrollHeight,document.documentElement.scrollHeight);
      newMask.style.width = _scrollWidth "px";
      newMask.style.height = _scrollHeight "px";
      newMask.style.top = "0px";
      newMask.style.left = "0px";
      newMask.style.background = "#000";
      newMask.style.filter = "alpha(opacity=50)";
      newMask.style.opacity = "0.50";
      newMask.style.display = 'aucun';
      document.body.appendChild(newMask);
      this._cover = newMask;
  >

新建弹出层

复制代码 代码如下 :

  _createFloater : fonction (html) {
      var newDiv = document.createElement("div");
      newDiv.id = this._id;
      newDiv.style.position = "absolu";
      newDiv.style.zIndex = "9999";
      nouveauDivWidth = 400;
      newDivHeight = 200;
      newDiv.style.width = newDivWidth "px";
      newDiv.style.height = newDivHeight "px";
      newDiv.style.top = (document.body.scrollTop document.body.clientHeight/2 - newDivHeight/2) "px";
      newDiv.style.left = (document.body.scrollLeft document.body.clientWidth/2 - newDivWidth/2) "px";
      newDiv.style.padding = "5px";
      newDiv.style.display = 'aucun';
      newDiv.innerHTML = html;
      document.body.appendChild(newDiv);
      this._floater = newDiv;
  >

调节弹层位置

复制代码 代码如下 :

     addjustPosition : function() {
         this._floater.style.top = (document.body.scrollTop document.body.clientHeight/2 - newDivHeight/2) "px";
         this._floater.style.left = (document.body.scrollLeft document.body.clientWidth/2 - newDivWidth/2) "px";
     >

屏幕滚动事件时调整位置

复制代码 代码如下 :

this._fS = BindAsEventListener(this, this.addjustPosition);
addEventHandler(window, "scroll", this._fS);
// 隐藏后需
removeEventHandler(window, "scroll", this._fS);

完整代码

复制代码 代码如下 :

 var Flotteur = (fonction(){
 var moi = Class.create();
 moi.prototype = {
     initialiser : fonction (options) {
         this._fS = BindAsEventListener(this, this.addjustPosition);
         this.setOptions(options);
     },
     setOptions : fonction (options) {
         ceci.options = options || {};
         this._id = options.id;
         this._mark = 'mark';
     },
     show : fonction (html, options) {
         options = options || {};
         si(!this._cover){
             this._createCover();
         >
         si(!this._floater){
             this._createFloater(html);
         >
         si(options.saveOpt){
             this._saveOption = options.saveOpt;
             this.bindSaveEvent();
         >
         this._bindScrollEvent();
         this.addjustPosition();
         this._floater.style.display = '';
         this._cover.style.display = '';
         this.isShow = true;
     },
     insérer : fonction (html, opts, att) {
         var _e = document.createElement("div"), _t;
         _e.innerHTML = html;
         pour(var k dans opts){
             _e[k] = opte[k];
         >
         _t = this._floater.querySelector('[' att ']');
         si(_t){
             _t.appendChild(_e);
         >
     },
     getFloater : fonction(){
         si(this._floater){
             renvoie this._floater;
         >
     },
     //遮罩层
     _createCover : fonction() {
         var newMask = document.createElement("div");
         newMask.id = this._mark;
         newMask.style.position = "absolu";
         newMask.style.zIndex = "100";
         _scrollWidth = Math.max(document.body.scrollWidth,document.documentElement.scrollWidth);
         _scrollHeight = Math.max(document.body.scrollHeight,document.documentElement.scrollHeight);
         newMask.style.width = _scrollWidth "px";
         newMask.style.height = _scrollHeight "px";
         newMask.style.top = "0px";
         newMask.style.left = "0px";
         newMask.style.background = "#000";
         newMask.style.filter = "alpha(opacity=50)";
         newMask.style.opacity = "0.50";
         newMask.style.display = 'aucun';
         document.body.appendChild(newMask);
         this._cover = newMask;
     },
     //新弹出层
     _createFloater : fonction (html) {
         var newDiv = document.createElement("div");
         newDiv.id = this._id;
         newDiv.style.position = "absolu";
         newDiv.style.zIndex = "9999";
         nouveauDivWidth = 400;
         newDivHeight = 200;
         newDiv.style.width = newDivWidth "px";
         newDiv.style.height = newDivHeight "px";
         newDiv.style.top = (document.body.scrollTop document.body.clientHeight/2 - newDivHeight/2) "px";
         newDiv.style.left = (document.body.scrollLeft document.body.clientWidth/2 - newDivWidth/2) "px";
         newDiv.style.padding = "5px";
         newDiv.style.display = 'aucun';
         newDiv.innerHTML = html;
         document.body.appendChild(newDiv);
         this._floater = newDiv;
     },
     //弹出层滚动居中
     addjustPosition : function() {
         this._floater.style.top = (document.body.scrollTop document.body.clientHeight/2 - newDivHeight/2) "px";
         this._floater.style.left = (document.body.scrollLeft document.body.clientWidth/2 - newDivWidth/2) "px";
     },
     bindSaveEvent : fonction() {
         this._saveElem = this._floater.querySelector('[' this._saveOption.elem ']');
         si(this._saveElem){
             addEventHandler(this._saveElem, "click", this._saveOption.handler);
         >
     },
     _bindScrollEvent : fonction() {
         addEventHandler(window, "scroll", this._fS);
     },
     cacher : fonction() {
         this.isShow = false;
         this.destory();
     },
     destory: function() {
         removeEventHandler(window, "scroll", this._fS);
         si(this._saveElem){
             removeEventHandler(this._saveElem, "click", this._saveOption.handler);
         >
         si (this._cover){
             document.body.removeChild(this._cover);
         >
         si (this._floater){
             document.body.removeChild(this._floater);
         >
         this._cover = null;
         this._floater = null;
     >
 };
 rends-moi ;
 })();