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原生JS封装拖动验证滑块的实现代码示例
网络编程 2024/11/19 佚名
3 1

前言

星期六闲着没事，就想着写写原生js玩玩，在网上看了几个效果后决定做这个效果，并且使用了prototype和eventEmitter封装成了库。

最终效果

原生JS封装拖动验证滑块的实现代码示例 

分析

看到这个效果我们首先应该想到和拖动有关的api: onmousedown, onmousemove, onmouseup

其次要支持用户传入放置这个组件的dom元素和完成的回调事件。

最终如何使用？

我们先来看下使用方式，再来决定我们怎么编写这个库

原生JS封装拖动验证滑块的实现代码示例

具体使用就是这样的，我们还想用户能通过import等方式使用，所以我们就要支持esMoudule的导入方式。

编写库的整体初始框架

(function () {
 // =================代码块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'), //创建一个style元素
    head = document.head || document.getElementsByTagName('head')[0]; //获取head元素
   style.type = 'text/css'; //这里必须显示设置style元素的type属性为text/css，否则在ie中不起作用
   if (style.styleSheet) { //IE
    var func = function () {
     try { //防止IE中stylesheet数量超过限制而发生错误
      style.styleSheet.cssText = cssText;
     } catch (e) {

     }
    }
    //如果当前styleSheet还不能用，则放到异步中则行
    if (style.styleSheet.disabled) {
     setTimeout(func, 10);
    } else {
     func();
    }
   } else { //w3c
    //w3c浏览器中只要创建文本节点插入到style元素中就行了
    var textNode = document.createTextNode(cssText);
    style.appendChild(textNode);
   }
   head.appendChild(style); //把创建的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';
  // 不重复添加事件
  if (util.indexOf(listeners, listener) === -1) {
   listeners.push(listenerIsWrapped "color: #000000">编写核心函数1(创建dom和css)





proto.createSlider = function () {
 this.options.el.innerHTML = '<div id="slider"><div class="drag_bg"></div><div class="drag_text" onselectstart="return false;" unselectable="on">拖动滑块验证</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,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAA3hpVFh0WE1MOmNvbS5hZG9iZS54bXAAAAAAADw/eHBhY2tldCBiZWdpbj0i77u/IiBpZD0iVzVNME1wQ2VoaUh6cmVTek5UY3prYzlkIj8+IDx4OnhtcG1ldGEgeG1sbnM6eD0iYWRvYmU6bnM6bWV0YS8iIHg6eG1wdGs9IkFkb2JlIFhNUCBDb3JlIDUuNS1jMDIxIDc5LjE1NTc3MiwgMjAxNC8wMS8xMy0xOTo0NDowMCAgICAgICAgIj4gPHJkZjpSREYgeG1sbnM6cmRmPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5LzAyLzIyLXJkZi1zeW50YXgtbnMjIj4gPHJkZjpEZXNjcmlwdGlvbiByZGY6YWJvdXQ9IiIgeG1sbnM6eG1wTU09Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC9tbS8iIHhtbG5zOnN0UmVmPSJodHRwOi8vbnMuYWRvYmUuY29tL3hhcC8xLjAvc1R5cGUvUmVzb3VyY2VSZWYjIiB4bWxuczp4bXA9Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC8iIHhtcE1NOk9yaWdpbmFsRG9jdW1lbnRJRD0ieG1wLmRpZDo0ZDhlNWY5My05NmI0LTRlNWQtOGFjYi03ZTY4OGYyMTU2ZTYiIHhtcE1NOkRvY3VtZW50SUQ9InhtcC5kaWQ6NTEyNTVEMURGMkVFMTFFNEI5NDBCMjQ2M0ExMDQ1OUYiIHhtcE1NOkluc3RhbmNlSUQ9InhtcC5paWQ6NTEyNTVEMUNGMkVFMTFFNEI5NDBCMjQ2M0ExMDQ1OUYiIHhtcDpDcmVhdG9yVG9vbD0iQWRvYmUgUGhvdG9zaG9wIENDIDIwMTQgKE1hY2ludG9zaCkiPiA8eG1wTU06RGVyaXZlZEZyb20gc3RSZWY6aW5zdGFuY2VJRD0ieG1wLmlpZDo2MTc5NzNmZS02OTQxLTQyOTYtYTIwNi02NDI2YTNkOWU5YmUiIHN0UmVmOmRvY3VtZW50SUQ9InhtcC5kaWQ6NGQ4ZTVmOTMtOTZiNC00ZTVkLThhY2ItN2U2ODhmMjE1NmU2Ii8+IDwvcmRmOkRlc2NyaXB0aW9uPiA8L3JkZjpSREY+IDwveDp4bXBtZXRhPiA8P3hwYWNrZXQgZW5kPSJyIj8+YiRG4AAAALFJREFUeNpi/P//PwMlgImBQkA9A+bOnfsIiBOxKcInh+yCaCDuByoswaIOpxwjciACFegBqZ1AvBSIS5OTk/8TkmNEjwWgQiUgtQuIjwAxUF3yX3xyGIEIFLwHpKyAWB+I1xGSwxULIGf9A7mQkBwTlhBXAFLHgPgqEAcTkmNCU6AL9d8WII4HOvk3ITkWJAXWUMlOoGQHmsE45ViQ2KuBuASoYC4Wf+OUYxz6mQkgwAAN9mIrUReCXgAAAABJRU5ErkJggg==") no-repeat center;} .handler_ok_bg {background: #fff url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAA3hpVFh0WE1MOmNvbS5hZG9iZS54bXAAAAAAADw/eHBhY2tldCBiZWdpbj0i77u/IiBpZD0iVzVNME1wQ2VoaUh6cmVTek5UY3prYzlkIj8+IDx4OnhtcG1ldGEgeG1sbnM6eD0iYWRvYmU6bnM6bWV0YS8iIHg6eG1wdGs9IkFkb2JlIFhNUCBDb3JlIDUuNS1jMDIxIDc5LjE1NTc3MiwgMjAxNC8wMS8xMy0xOTo0NDowMCAgICAgICAgIj4gPHJkZjpSREYgeG1sbnM6cmRmPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5LzAyLzIyLXJkZi1zeW50YXgtbnMjIj4gPHJkZjpEZXNjcmlwdGlvbiByZGY6YWJvdXQ9IiIgeG1sbnM6eG1wTU09Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC9tbS8iIHhtbG5zOnN0UmVmPSJodHRwOi8vbnMuYWRvYmUuY29tL3hhcC8xLjAvc1R5cGUvUmVzb3VyY2VSZWYjIiB4bWxuczp4bXA9Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC8iIHhtcE1NOk9yaWdpbmFsRG9jdW1lbnRJRD0ieG1wLmRpZDo0ZDhlNWY5My05NmI0LTRlNWQtOGFjYi03ZTY4OGYyMTU2ZTYiIHhtcE1NOkRvY3VtZW50SUQ9InhtcC5kaWQ6NDlBRDI3NjVGMkQ2MTFFNEI5NDBCMjQ2M0ExMDQ1OUYiIHhtcE1NOkluc3RhbmNlSUQ9InhtcC5paWQ6NDlBRDI3NjRGMkQ2MTFFNEI5NDBCMjQ2M0ExMDQ1OUYiIHhtcDpDcmVhdG9yVG9vbD0iQWRvYmUgUGhvdG9zaG9wIENDIDIwMTQgKE1hY2ludG9zaCkiPiA8eG1wTU06RGVyaXZlZEZyb20gc3RSZWY6aW5zdGFuY2VJRD0ieG1wLmlpZDphNWEzMWNhMC1hYmViLTQxNWEtYTEwZS04Y2U5NzRlN2Q4YTEiIHN0UmVmOmRvY3VtZW50SUQ9InhtcC5kaWQ6NGQ4ZTVmOTMtOTZiNC00ZTVkLThhY2ItN2U2ODhmMjE1NmU2Ii8+IDwvcmRmOkRlc2NyaXB0aW9uPiA8L3JkZjpSREY+IDwveDp4bXBtZXRhPiA8P3hwYWNrZXQgZW5kPSJyIj8+k+sHwwAAASZJREFUeNpi/P//PwMyKD8uZw+kUoDYEYgloMIvgHg/EM/ptHx0EFk9I8wAoEZ+IDUPiIMY8IN1QJwENOgj3ACo5gNAbMBAHLgAxA4gQ5igAnNJ0MwAVTsX7IKyY7L2UNuJAf+AmAmJ78AEDTBiwGYg5gbifCSxFCZoaBMCy4A4GOjnH0D6DpK4IxNSVIHAfSDOAeLraJrjgJp/AwPbHMhejiQnwYRmUzNQ4VQgDQqXK0ia/0I17wJiPmQNTNBEAgMlQIWiQA2vgWw7QppBekGxsAjIiEUSBNnsBDWEAY9mEFgMMgBk00E0iZtA7AHEctDQ58MRuA6wlLgGFMoMpIG1QFeGwAIxGZo8GUhIysmwQGSAZgwHaEZhICIzOaBkJkqyM0CAAQDGx279Jf50AAAAAABJRU5ErkJggg==") 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;}')//像页面里add新的样式
}
proto.getElements = function () {
 this.slider = document.querySelector('#slider');
 this.drag_bg = document.querySelector('.drag_bg');
 this.handler = document.querySelector('.handler');
}





编写核心函数2(绑定事件)





proto.bindEvents = function () {
 var self = this;
 self.handler.onmousedown = function (e) {
  self.diffX = e.clientX - self.handler.offsetLeft;
  util.setClassName(self.slider, 'unselect'); //禁止选择样式
  document.onmousemove = function (e) {
   let deltaX = e.clientX - self.diffX;
   if (deltaX >= self.slider.offsetWidth - self.handler.offsetWidth) { //拖动到了最右侧
    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') //拖动完成后的样式
    util.addClass(self.handler, 'handler_ok_bg')////拖动完成后的样式
    self.handler.onmousedown = null //防止拖动完成后再次拖动
    self.emit('complete')//emit通知使用者的回调事件
   } 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(核心函数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;
  }
 },
}





最终完整可运行代码





(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'), //创建一个style元素
    head = document.head || document.getElementsByTagName('head')[0]; //获取head元素
   style.type = 'text/css'; //这里必须显示设置style元素的type属性为text/css，否则在ie中不起作用
   if (style.styleSheet) { //IE
    var func = function () {
     try { //防止IE中stylesheet数量超过限制而发生错误
      style.styleSheet.cssText = cssText;
     } catch (e) {

     }
    }
    //如果当前styleSheet还不能用，则放到异步中则行
    if (style.styleSheet.disabled) {
     setTimeout(func, 10);
    } else {
     func();
    }
   } else { //w3c
    //w3c浏览器中只要创建文本节点插入到style元素中就行了
    var textNode = document.createTextNode(cssText);
    style.appendChild(textNode);
   }
   head.appendChild(style); //把创建的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';

  // 不重复添加事件
  if (util.indexOf(listeners, listener) === -1) {
   listeners.push(listenerIsWrapped "slider"><div class="drag_bg"></div><div class="drag_text" onselectstart="return false;" unselectable="on">拖动滑块验证</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('验证完成');
})





结语




参考资料
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更新日志

友情链接

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