Posted in Javascript onDecember 22, 2014
创建遮罩层
_createCover: function() { var newMask = document.createElement("div"); newMask.id = this._mark; newMask.style.position = "absolute"; 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 = 'none'; document.body.appendChild(newMask); this._cover = newMask; }
新建弹出层
_createFloater: function(html) { var newDiv = document.createElement("div"); newDiv.id = this._id; newDiv.style.position = "absolute"; newDiv.style.zIndex = "9999"; newDivWidth = 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 = 'none'; newDiv.innerHTML = html; document.body.appendChild(newDiv); this._floater = newDiv; }
调节弹层位置
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
this._fS = BindAsEventListener(this, this.addjustPosition); addEventHandler(window, "scroll", this._fS); // 隐藏后需 removeEventHandler(window, "scroll", this._fS);
完整代码
var Floater = (function(){ var me = Class.create(); me.prototype = { initialize: function(options) { this._fS = BindAsEventListener(this, this.addjustPosition); this.setOptions(options); }, setOptions: function(options) { this.options = options || {}; this._id = options.id; this._mark = 'mark'; }, show: function(html,options) { options = options || {}; if(!this._cover){ this._createCover(); } if(!this._floater){ this._createFloater(html); } if(options.saveOpt){ this._saveOption = options.saveOpt; this.bindSaveEvent(); } this._bindScrollEvent(); this.addjustPosition(); this._floater.style.display = ''; this._cover.style.display = ''; this.isShow = true; }, insert: function(html,opts,att){ var _e = document.createElement("div"), _t; _e.innerHTML = html; for(var k in opts){ _e[k] = opts[k]; } _t = this._floater.querySelector('['+att+']'); if(_t){ _t.appendChild(_e); } }, getFloater: function(){ if(this._floater){ return this._floater; } }, //遮罩层 _createCover: function() { var newMask = document.createElement("div"); newMask.id = this._mark; newMask.style.position = "absolute"; 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 = 'none'; document.body.appendChild(newMask); this._cover = newMask; }, //新弹出层 _createFloater: function(html) { var newDiv = document.createElement("div"); newDiv.id = this._id; newDiv.style.position = "absolute"; newDiv.style.zIndex = "9999"; newDivWidth = 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 = 'none'; 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: function() { this._saveElem = this._floater.querySelector('['+this._saveOption.elem+']'); if(this._saveElem){ addEventHandler(this._saveElem, "click", this._saveOption.handler); } }, _bindScrollEvent: function() { addEventHandler(window, "scroll", this._fS); }, hide: function() { this.isShow = false; this.destory(); }, destory: function() { removeEventHandler(window, "scroll", this._fS); if(this._saveElem){ removeEventHandler(this._saveElem, "click", this._saveOption.handler); } if (this._cover){ document.body.removeChild(this._cover); } if (this._floater){ document.body.removeChild(this._floater); } this._cover = null; this._floater = null; } }; return me; })();
使用原生JS实现弹出层特效
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