原生js实现查询天气小应用

 //调用jsonp函数请求当前所在城市jsonp('https://api.map.baidu.com/api?v=2.0&ak=Dv1NMU23dh1sGS9n2tUouDEYY96Dfzh3&s=1&callback=getCity');window.onload=function(){ //请求天气车数据 btn.onclick=function (){  jsonp(createUrl()); }};function getCity(){ function city(result){  jsonp(createUrl(result.name)); } var cityName = new BMap.LocalCity(); cityName.get(city);}// 数据请求函数function jsonp(url){ var script = document.createElement('script'); script.src = url; document.body.insertBefore(script, document.body.firstChild); document.body.removeChild(script);}//数据请求成功回调函数，用于将获取到的数据放入页面相应位置function getWeather(response) { var oSpan = document.getElementsByClassName('info'); var data = response.result.data; oSpan[0].innerHTML=data.realtime.city_name; oSpan[1].innerHTML=data.realtime.date; oSpan[2].innerHTML='星期'+data.weather[0].week; oSpan[3].innerHTML=data.realtime.weather.info; oSpan[4].innerHTML=data.realtime.weather.temperature+'℃'; oSpan[5].innerHTML=data.realtime.wind.direct; oSpan[6].innerHTML=data.realtime.weather.humidity+'%'; oSpan[7].innerHTML=data.realtime.time; oSpan[8].innerHTML=data.life.info.ziwaixian[0]; oSpan[9].innerHTML=data.life.info.xiche[0]; oSpan[10].innerHTML=data.life.info.kongtiao[0]; oSpan[11].innerHTML=data.life.info.chuanyi[0]; var aDiv = document.getElementsByClassName('future_box'); for(var i=0; i<aDiv.length; i++){  var aSpan = aDiv[i].getElementsByClassName('future_info');  aSpan[0].innerHTML = data.weather[i].date;  aSpan[1].innerHTML = '星期'+data.weather[i].week;  aSpan[2].innerHTML =data.weather[i].info.day[1];  aSpan[3].innerHTML = data.weather[i].info.day[2]+'℃'; } changeImg(response);}//根据获取到的数据更改页面中相应的图片function changeImg(data){ var firstImg = document.getElementsByTagName("img")[0]; var firstWeatherId=data.result.data.realtime.weather.img; chooseImg(firstWeatherId,firstImg); var aImg = document.getElementById('future_container').getElementsByTagName('img'); for(var j=0; j<aImg.length; j++){  var weatherId = data.result.data.weather[j].info.day[0];  chooseImg(weatherId,aImg[j]); }}//选择图片function chooseImg(id,index){ switch(id){  case '0':   index.src='images/weather_icon/1.png';   break;  case '1':   index.src='images/weather_icon/2.png';   break;  case '2':   index.src='images/weather_icon/3.png';   break;  case '3':  case '7':  case '8':   index.src='images/weather_icon/4.png';   break;  case '6':   index.src='images/weather_icon/6.png';   break;  case '13':  case '14':  case '15':  case '16':   index.src='images/weather_icon/5.png';   break;  case '33':   index.src='images/weather_icon/7.png';   break;  default:   index.src='images/weather_icon/8.png'; }}//根据城市名创建请求数据及urlfunction createUrl(){ var cityName = ''; if(arguments.length == 0) {  cityName = document.getElementById('text').value; }else{  cityName = arguments[0]; } var url = 'https://op.juhe.cn/onebox/weather/query?cityname=' + encodeURI(cityName) + '&key=1053d001421b886dcecf81a38422a1a2&callback=getWeather'; return url;}