JS+cookie实现购物评价五星好评功能
本文实例为大家分享了JS+cookie实现购物评价五星好评功能的具体代码,供大家参考,具体内容如下
案例实现的是购物评价中五星点评功能.
通过JS面向对象方法实现
利用cookie实现历史点评保存的功能,在下一次打开页面仍保存上一次点评效果.
具体html,js代码如下:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <body> <script type="module"> function getCookie(){ return document.cookie.split(";").reduce((value,item,index)=>{ var arr=item.split("="); var t=arr[1].trim(); try{ t=JSON.parse(t); }catch(e){ t=t; } value[arr[0].trim()]=t; return value; },{}) } if(document.cookie.length>0){ var a=getCookie(); var keys=Object.keys(a); console.log(a) console.log(keys) } var list=["用户体验","物流速度","物流服务","商家态度","商品包装"] import Starr from "./js/Starr.js"; list.forEach((item,index)=>{ let star= new Starr(item); star.appendTo("body"); var index=keys.indexOf(item); if(index>-1){ star.prv=a[item]-1; star.changeScore(a[item]-1); star.changestar(a[item]-1); } }) </script> </body> </html>
JS代码部分:
import Component from './Component.js'; export default class Starr extends Component{ labelCon; starCon; startArr=[]; score; face; prv; index; static EVERYSCORE={}; static STARTNUM=5; constructor(_label){ super(); this.label=_label; Object.assign(this.elem.style,{ width: "auto", float: "left", height: "16px", paddingBottom: "10px", marginRight: "20px", paddingTop:"16px" }); Starr.EVERYSCORE[_label]=0; this.creatLabel(_label); this.creatStartCon(); this.creatScore(); this.starCon.addEventListener("mouseover",e=>this.mouseHandler(e)); this.starCon.addEventListener("mouseleave",e=>this.mouseHandler(e)); this.starCon.addEventListener("click",e=>this.mouseHandler(e)); // this.elem.addEventListener("change",e=>this.changeHandler(e)); } //创建label容器 creatLabel(label){ this.labelCon=document.createElement("span"); Object.assign(this.labelCon.style,{ float: "left", height: "16px", lineHeight: "16px", marginRight: "10px", overflow: "hidden", whiteSpace: "nowrap", textOverflow: "ellipsis", font: '12px/150% tahoma,arial,Microsoft YaHei,Hiragino Sans GB,"\u5b8b\u4f53",sans-serif', color: "#666" }); this.labelCon.textContent=label; this.elem.appendChild(this.labelCon); } //创建星星和笑脸的容器 starCon creatStartCon(){ this.starCon=document.createElement("div"); Object.assign(this.starCon.style,{ float:"left", height:"16px", position:"relative", marginTop:"1px" }); for(var i=0;i<Starr.STARTNUM;i++){ let star = document.createElement("div"); Object.assign(star.style,{ width:"16px", height:"16px", float:"left", backgroundImage:"url(./img/commstar.png)", }); this.starCon.appendChild(star); this.startArr.push(star) } this.face=document.createElement("div"); Object.assign(this.face.style,{ width:"16px", height:"16px", backgroundImage:"url(./img/face-red.png)", position:"absolute", top:"-16px", display:"none" }) this.starCon.appendChild(this.face) this.elem.appendChild(this.starCon); } //创建分数 creatScore(){ this.score = document.createElement("span"); Object.assign(this.score.style,{ position: "relative", width: "30px", height: "16px", top:"-2px", marginLeft:"10px", lineHeight: "16px", textAlign: "right", color: "#999", font:'12px/150% tahoma,arial,Microsoft YaHei,Hiragino Sans GB,"\u5b8b\u4f53",sans-serif', }); this.score.textContent="0分"; this.elem.appendChild(this.score); } //鼠标事件 mouseHandler(e){ //进入时 if(e.type==="mouseover"){ this.face.style.display="block"; let index=this.startArr.indexOf(e.target); if(index<0)return; this.changeFace(index); this.changeScore(index); if(this.prv>index){ this.changestar(this.prv); }else{ this.changestar(index); } //离开时 }else if(e.type==="mouseleave"){ this.face.style.display="none"; if(this.prv>=0){ this.changestar(this.prv); this.changeScore(this.prv); this.changeFace(this.prv); }else{ this.changestar(-1); this.changeScore(-1); this.changeFace(0); } //点击时 }else if(e.type==="click"){ let index=this.startArr.indexOf(e.target); this.prv=index; this.changestar(this.prv); this.changeScore(this.prv); this.changeFace(this.prv); this.getCookie(this.prv+1); Starr.EVERYSCORE[this.label]=index+1; } } //改变星星颜色方法 changestar(index){ for(var i=0;i<this.startArr.length;i++){ if(i<=index)this.startArr[i].style.backgroundPositionY="-16px"; else this.startArr[i].style.backgroundPositionY="0px"; } } //分数改变方法 changeScore(index){ this.index=index; this.score.textContent=index+1+"分"; if(index+1===0){ this.score.style.color="#999"; }else{ //否则有分数,文字为红色 this.score.style.color="#e4393c"; } } //笑脸变化 changeFace(index){ this.face.style.left=index*16+"px"; this.face.style.backgroundPositionX=-(4-index)*20+"px"; } //设置cookie getCookie(index){ var date = new Date(); date.setFullYear(2021); if(!index)index=0; document.cookie=this.label+"="+index+";expires="+date.toDateString(); } }
最终实现效果: 下次打开仍会显示该点评效果
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