前言

星期六閑著沒事，就想著寫寫原生js玩玩，在網上看了幾個效果后決定做這個效果，并且使用了prototype和eventEmitter封裝成了庫。

最終效果

分析

看到這個效果我們首先應該想到和拖動有關的api: onmousedown, onmousemove, onmouseup

其次要支持用戶傳入放置這個組件的dom元素和完成的回調事件。

最終如何使用？

我們先來看下使用方式，再來決定我們怎么編寫這個庫

具體使用就是這樣的，我們還想用戶能通過import等方式使用，所以我們就要支持esMoudule的導入方式。

編寫庫的整體初始框架

(function () { // =================代碼塊1========================================= var root = (typeof self == ’object’ && self.self == self && self) || (typeof global == ’object’ && global.global == global && global) || this || {}; var util = { extend: function (target) { for (var i = 1, len = arguments.length; i < len; i++) { for (var prop in arguments[i]) { if (arguments[i].hasOwnProperty(prop)) { target[prop] = arguments[i][prop] } } } return target }, isValidListener: function (listener) { if (typeof listener === ’function’) { return true } else if (listener && typeof listener === ’object’) { return util.isValidListener(listener.listener) } else { return false } }, addCSS: function (cssText) { var style = document.createElement(’style’), //創建一個style元素 head = document.head || document.getElementsByTagName(’head’)[0]; //獲取head元素 style.type = ’text/css’; //這里必須顯示設置style元素的type屬性為text/css，否則在ie中不起作用 if (style.styleSheet) { //IE var func = function () { try { //防止IE中stylesheet數量超過限制而發生錯誤 style.styleSheet.cssText = cssText; } catch (e) { } } //如果當前styleSheet還不能用，則放到異步中則行 if (style.styleSheet.disabled) { setTimeout(func, 10); } else { func(); } } else { //w3c //w3c瀏覽器中只要創建文本節點插入到style元素中就行了 var textNode = document.createTextNode(cssText); style.appendChild(textNode); } head.appendChild(style); //把創建的style元素插入到head中 }, indexOf: function (array, item) { if (array.indexOf) { return array.indexOf(item); } else { var result = -1; for (var i = 0, len = array.length; i < len; i++) { if (array[i] === item) { result = i; break; } } return result; } } } function EventEmitter() { this._events = {} } EventEmitter.prototype.on = function (eventName, listener) { if (!eventName || !listener) return; if (!util.isValidListener(listener)) { throw new TypeError(’listener must be a function’); } var events = this._events; var listeners = events[eventName] = events[eventName] || []; var listenerIsWrapped = typeof listener === ’object’; // 不重復添加事件 if (util.indexOf(listeners, listener) === -1) { listeners.push(listenerIsWrapped ? listener : { listener: listener, once: false }); } return this; }; EventEmitter.prototype.once = function (eventName, listener) { return this.on(eventName, { listener: listener, once: true }) }; EventEmitter.prototype.off = function (eventName, listener) { var listeners = this._events[eventName]; if (!listeners) return; var index; for (var i = 0, len = listeners.length; i < len; i++) { if (listeners[i] && listeners[i].listener === listener) { index = i; break; } } if (typeof index !== ’undefined’) { listeners.splice(index, 1, null) } return this; }; EventEmitter.prototype.emit = function (eventName, args) { var listeners = this._events[eventName]; if (!listeners) return; for (var i = 0; i < listeners.length; i++) { var listener = listeners[i]; if (listener) { listener.listener.apply(this, args || []); if (listener.once) { this.off(eventName, listener.listener) } } } return this; }; // =================代碼塊2========================================= function SliderTools(options) { this.options = util.extend({}, this.constructor.defaultOptions, options) this.init(); this.bindEvents(); this.diffX = 0; this.flag = false;//是否拖動到最右側 } SliderTools.defaultOptions = { el: document.body //默認放到body里 }; var proto = SliderTools.prototype = new EventEmitter();//SliderTools繼承emitter proto.constructor = SliderTools;//修正構造器 proto.init = function () { this.createSlider();//創建插件所需要的dom元素 this.getElements();//獲取創建好的元素 } // =================代碼塊3========================================= if (typeof exports != ’undefined’ && !exports.nodeType) { if (typeof module != ’undefined’ && !module.nodeType && module.exports) { exports = module.exports = SliderTools; } exports.SliderTools = SliderTools; } else { root.SliderTools = SliderTools; }}());

代碼塊1是在判斷是在瀏覽器環境還是nodeJS環境，方便代碼三后期使用， 代碼塊2聲明了一個對象 SliderTools ,將用戶傳進來的 option 和默認的 defaultOption 進行合并

編寫核心函數1(創建dom和css)

proto.createSlider = function () { this.options.el.innerHTML = ’<div id='slider'><div class='drag_bg'></div><div onselectstart='return false;' unselectable='on'>拖動滑塊驗證</div><div class='handler handler_bg'></div></div>’;//像指定元素中放置插件的dom元素 util.addCSS(’ul,li {list-style: none;} a {text-decoration: none;} .wrap {width: 300px;height: 350px;text-align: center;margin: 150px auto;}.inner {padding: 15px;} .clearfix {overflow: hidden;_zoom: 1;} .none {display: none;} #slider {position:relative;background-color: #e8e8e8;width: 300px;height: 34px;line-height: 34px;text-align: center;} #slider .handler {position: absolute;top: 0px;left: 0px;width: 40px;height: 32px;border: 1px solid #ccc;cursor: move;} .handler_bg {background: #fff url('data:image/png;base64,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') no-repeat center;} .handler_ok_bg {background: #fff url('data:image/png;base64,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') no-repeat center;}#slider .drag_bg {background-color: #7ac23c; height: 34px;width: 0px;} #slider .drag_text {position: absolute; top: 0px;width: 300px;-moz-user-select: none;-webkit-user-select: none;user-select: none;-o-user-select: none;-ms-user-select: none; }.unselect {-moz-user-select: none;-webkit-user-select: none; -ms-user-select: none;}.slide_ok {color: #fff;}’)//像頁面里add新的樣式}proto.getElements = function () { this.slider = document.querySelector(’#slider’); this.drag_bg = document.querySelector(’.drag_bg’); this.handler = document.querySelector(’.handler’);}

編寫核心函數2(綁定事件)

proto.bindEvents = function () { var self = this; self.handler.onmousedown = function (e) { self.diffX = e.clientX - self.handler.offsetLeft; util.setClassName(self.slider, ’unselect’); //禁止選擇樣式 document.onmousemove = function (e) { let deltaX = e.clientX - self.diffX; if (deltaX >= self.slider.offsetWidth - self.handler.offsetWidth) { //拖動到了最右側 deltaX = self.slider.offsetWidth - self.handler.offsetWidth; self.flag = true; } else if (deltaX <= 0) { deltaX = 0; self.flag = false; } else { self.flag = false; } util.setInlineStyle([self.handler], ’left’, deltaX + ’px’); util.setInlineStyle([self.drag_bg], ’width’, deltaX + ’px’); } document.onmouseup = function (e) { util.setClassName(self.slider, ’’) if (self.flag) { util.setClassName(self.slider, ’slide_ok’) //拖動完成后的樣式 util.addClass(self.handler, ’handler_ok_bg’)////拖動完成后的樣式 self.handler.onmousedown = null //防止拖動完成后再次拖動 self.emit(’complete’)//emit通知使用者的回調事件 } else { util.setInlineStyle([self.handler], ’left’, 0 + ’px’); util.setInlineStyle([self.drag_bg], ’width’, 0 + ’px’); } document.onmousemove = null; document.onmouseup = null; } }}

添加工具方法(核心函數2中用到的)

var util = { // ...初始框架里的那部分 setClassName(selector, className) { selector.className = className; }, addClass(selector, className) { selector.classList.add(className); }, setInlineStyle(selector, attr, content) { let length = selector.length; for (let i = 0; i < length; i++) { selector[i].style[attr] = content; } },}

最終完整可運行代碼

(function () { var root = (typeof self == ’object’ && self.self == self && self) || (typeof global == ’object’ && global.global == global && global) || this || {}; var util = { extend: function (target) { for (var i = 1, len = arguments.length; i < len; i++) { for (var prop in arguments[i]) { if (arguments[i].hasOwnProperty(prop)) { target[prop] = arguments[i][prop] } } } return target }, setClassName(selector, className) { selector.className = className; }, addClass(selector, className) { selector.classList.add(className); }, setInlineStyle(selector, attr, content) { let length = selector.length; for (let i = 0; i < length; i++) { selector[i].style[attr] = content; } }, isValidListener: function (listener) { if (typeof listener === ’function’) { return true } else if (listener && typeof listener === ’object’) { return util.isValidListener(listener.listener) } else { return false } }, addCSS: function (cssText) { var style = document.createElement(’style’), //創建一個style元素 head = document.head || document.getElementsByTagName(’head’)[0]; //獲取head元素 style.type = ’text/css’; //這里必須顯示設置style元素的type屬性為text/css，否則在ie中不起作用 if (style.styleSheet) { //IE var func = function () { try { //防止IE中stylesheet數量超過限制而發生錯誤 style.styleSheet.cssText = cssText; } catch (e) { } } //如果當前styleSheet還不能用，則放到異步中則行 if (style.styleSheet.disabled) { setTimeout(func, 10); } else { func(); } } else { //w3c //w3c瀏覽器中只要創建文本節點插入到style元素中就行了 var textNode = document.createTextNode(cssText); style.appendChild(textNode); } head.appendChild(style); //把創建的style元素插入到head中 }, indexOf: function (array, item) { if (array.indexOf) { return array.indexOf(item); } else { var result = -1; for (var i = 0, len = array.length; i < len; i++) { if (array[i] === item) { result = i; break; } } return result; } } } function EventEmitter() { this._events = {} } EventEmitter.prototype.on = function (eventName, listener) { if (!eventName || !listener) return; if (!util.isValidListener(listener)) { throw new TypeError(’listener must be a function’); } var events = this._events; var listeners = events[eventName] = events[eventName] || []; var listenerIsWrapped = typeof listener === ’object’; // 不重復添加事件 if (util.indexOf(listeners, listener) === -1) { listeners.push(listenerIsWrapped ? listener : { listener: listener, once: false }); } return this; }; EventEmitter.prototype.once = function (eventName, listener) { return this.on(eventName, { listener: listener, once: true }) }; EventEmitter.prototype.off = function (eventName, listener) { var listeners = this._events[eventName]; if (!listeners) return; var index; for (var i = 0, len = listeners.length; i < len; i++) { if (listeners[i] && listeners[i].listener === listener) { index = i; break; } } if (typeof index !== ’undefined’) { listeners.splice(index, 1, null) } return this; }; EventEmitter.prototype.emit = function (eventName, args) { var listeners = this._events[eventName]; if (!listeners) return; for (var i = 0; i < listeners.length; i++) { var listener = listeners[i]; if (listener) { listener.listener.apply(this, args || []); if (listener.once) { this.off(eventName, listener.listener) } } } return this; }; function SliderTools(options) { this.options = util.extend({}, this.constructor.defaultOptions, options) this.init(); this.bindEvents(); this.diffX = 0; this.flag = false; } SliderTools.VERSION = ’1.0.0’; SliderTools.defaultOptions = { el: document.body }; var proto = SliderTools.prototype = new EventEmitter(); proto.constructor = SliderTools; proto.init = function () { this.createSlider(); this.getElements(); } proto.createSlider = function () { this.options.el.innerHTML = ’<div id='slider'><div class='drag_bg'></div><div onselectstart='return false;' unselectable='on'>拖動滑塊驗證</div><div class='handler handler_bg'></div></div>’; util.addCSS(’ul, li { list-style: none; } a { text-decoration: none; } .wrap { width: 300px; height: 350px; text-align: center; margin: 150px auto; } .inner { padding: 15px; } .clearfix { overflow: hidden; _zoom: 1; } .none { display: none; } #slider { position: relative; background-color: #e8e8e8; width: 300px; height: 34px; line-height: 34px; text-align: center; } #slider .handler { position: absolute; top: 0px; left: 0px; width: 40px; height: 32px; border: 1px solid #ccc; cursor: move;} .handler_bg { background: #fff url('data:image/png;base64,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') no-repeat center; } .handler_ok_bg { background: #fff url('data:image/png;base64,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') no-repeat center; } #slider .drag_bg { background-color: #7ac23c; height: 34px; width: 0px; } #slider .drag_text { position: absolute; top: 0px; width: 300px; -moz-user-select: none; -webkit-user-select: none; user-select: none; -o-user-select: none; -ms-user-select: none; } .unselect { -moz-user-select: none; -webkit-user-select: none; -ms-user-select: none; } .slide_ok { color: #fff; }’) } proto.getElements = function () { this.slider = document.querySelector(’#slider’); this.drag_bg = document.querySelector(’.drag_bg’); this.handler = document.querySelector(’.handler’); } proto.bindEvents = function () { var self = this; self.handler.onmousedown = function (e) { self.diffX = e.clientX - self.handler.offsetLeft; util.setClassName(self.slider, ’unselect’); document.onmousemove = function (e) { let deltaX = e.clientX - self.diffX; if (deltaX >= self.slider.offsetWidth - self.handler.offsetWidth) { deltaX = self.slider.offsetWidth - self.handler.offsetWidth; self.flag = true; } else if (deltaX <= 0) { deltaX = 0; self.flag = false; } else { self.flag = false; } util.setInlineStyle([self.handler], ’left’, deltaX + ’px’); util.setInlineStyle([self.drag_bg], ’width’, deltaX + ’px’); } document.onmouseup = function (e) { util.setClassName(self.slider, ’’) if (self.flag) { util.setClassName(self.slider, ’slide_ok’) util.addClass(self.handler, ’handler_ok_bg’) self.handler.onmousedown = null self.emit(’complete’) } else { util.setInlineStyle([self.handler], ’left’, 0 + ’px’); util.setInlineStyle([self.drag_bg], ’width’, 0 + ’px’); } document.onmousemove = null; document.onmouseup = null; } } } if (typeof exports != ’undefined’ && !exports.nodeType) { if (typeof module != ’undefined’ && !module.nodeType && module.exports) { exports = module.exports = SliderTools; } exports.SliderTools = SliderTools; } else { root.SliderTools = SliderTools; }}());let slider = new SliderTools();slider.on(’complete’,() => { alert(’驗證完成’);})

結語

參考資料

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