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原生JS实现天气预报
网络编程 2024/12/23 佚名
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本文实例为大家分享了JS实现天气预报的具体代码，供大家参考，具体内容如下

HTML代码

<!doctype html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <meta name="viewport"
  content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
 <meta http-equiv="X-UA-Compatible" content="ie=edge">
 <title>Document</title>
 <link rel="stylesheet" href="tianqi.css" >
 <link rel="stylesheet" href="iconfont/iconfont.css" >
</head>
<body>
 <!-- 搜索 -->
 <div class="search">
 <span>Tq</span>
 <form target="sou" id="search_from">
 <input type="search" placeholder="输入搜索的城市">
 <iframe name="sou" style = "display: none"></iframe>
 </form>
 <div class="search-btn"><img src="/UploadFiles/2021-04-02/search.png">


CSS代码





* {
 margin: 0;
 padding: 0;
}
ul,li {
 list-style: none;
}
body {
 background-size: 120%;
 color: white;
}
.search {
 position: fixed;
 width: 100%;
 height: 0.5rem;
 background-color: rgba(0,0,0,.0);
 display: flex;
 justify-content: space-between;
 align-items: center;
}
#search_from {
 width: 2.8rem;
 height: 0.4rem;
 position: relative;
}
.search > span {
 width: 0.5rem;
 font-size: 0.25rem;
 line-height: 0.5rem;
 text-align: center;
 font-family: "Segoe UI Symbol";
 color: white;
}
.search #search_from > input {
 width: 2.8rem;
 height: 0.4rem;
 border-radius: 0.1rem;
 text-indent: 0.1rem;
 outline: none;
 position: absolute;
 border: none;
 border-bottom: 0.01rem solid white;
 background-color: rgba(255,255,255,.05);
 color: white;
}
.search #search_from > input::-webkit-input-placeholder {
 color: white;
}
.search > .search-btn {
 width: 0.5rem;
 position: relative;
}
.search > .search-btn > img {
 width: 0.25rem;
 position: absolute;
 top: 50%;
 left: 50%;
 transform: translate(-50%,-50%);
}
.history {
 height: 0.9rem;
 overflow: auto;
 background-color: rgba(255,255,255,.05);
 transition-duration: 0.5s;
}
.historys {
 margin-top: 0.8rem;
 overflow: hidden;
}
.history .history-item {
 display: flex;
 height: 0.4rem;
 border-bottom: 0.01rem dashed #cccccc;
 align-items: center;
 justify-content: space-evenly;
}
.history .history-item > .history-time {
 font-size: 0.14rem;
}
.history .history-item > .history-city {
 font-size: 0.18rem;
}
.history .la {
 height: 0.3rem;
 display: flex;
 position: fixed;
 top: 0.45rem;
 width: 90%;
 background-color: rgba(255,255,255,.0);
 justify-content: space-between;
 font-size: 0.16rem;
 border-bottom: 0.01rem solid white;
 margin: 0.1rem 0.2rem;
 font-family: 幼圆;
 line-height: 0.3rem;
}
.history .la > span {
 color: white;
}
.history .la > img {
 width: 0.2rem;
 height: 0.2rem;
 padding: 0.03rem;
 border: 0.01rem solid #cccccc;
 border-radius: 0.05rem;
}
.clearbtn {
 height: 0.3rem;
 text-align: center;
 text-decoration: underline;
 font-size: 0.2rem;
 margin-top: 0.1rem;
 line-height: 0.3rem;
}
.information {
 /*background-color: gold;*/
}
.now {
 padding-top: 0.2rem;
 display: flex;
 flex-direction: column;
}
.now .city {
 font-size: 0.4rem;
 text-align: center;
}
.now .situation {
 padding-top: 0.2rem;
 display: flex;
 justify-content: space-evenly;
 font-size: 0.15rem;
 align-items: center;
}
.now .situation > img {
 width: 1rem;
 height: 1rem;
 vertical-align: bottom;
}
.now .temp {
 display: flex;
 flex-direction: column;
 align-items: center;
}
.now .temp > h3 {
 font-size: 0.2rem;
 margin-top: 0.1rem;
}
.forecast {
 background-color: rgba(0,0,0,.3);
 margin: 0 0.2rem;
 border-radius: 0.1rem;
}
.forecast-item {
 height: 0.3rem;
 display: flex;
 justify-content: space-between;
 margin: 0.1rem 0.2rem 0;
 padding-top: 0.1rem;
}
.forecast-item:last-of-type {
 padding-bottom: 0.1rem;
}
.forecast-item .forecast-situation > img {
 width: 0.2rem;
 height: 0.2rem;
}
.forecast-item .forecast-situation {
 font-size: 0.16rem;
}
.forecast-temp {
 font-size: 0.18rem;
}
.lifestyle {
 display: none;
 margin: 0 0.2rem;
 background-color: rgba(0,0,0,.3);
 border-radius: 0.1rem;
}
.lifestyle > h2 {
 text-align: center;
 margin-top: 0.2rem;
 font-size: 0.2rem;
 padding-top: 0.15rem;
 font-family: 幼圆;
}
.lifestyle .lifestyle-box {
 display: flex;
 flex-wrap: wrap;
 justify-content: space-between;
}
.lifestyle .lifestyle-box .lifestyle-item {
 display: flex;
 flex-direction: column;
 width: 0.7rem;
 height: 0.4rem;
 font-size: 0.14rem;
 text-align: center;
 padding-top: 0.1rem;
 padding-bottom: 0.05rem;

}
.lifestyle .lifestyle-box .lifestyle-item > i {
 font-size: 0.2rem;
}
.lifestyle .lifestyle-box .lifestyle-item > span {
 white-space: nowrap;
 text-overflow:ellipsis;
 overflow:hidden;
}
.lifestyle-tc {
 height: 100vh;
 position: fixed;
 top: 0;
 left: 0;
 background-color: gold;
 font-family: 幼圆;
 line-height: 0.4rem;

}
.lifestyle-tc .fanghui {
 width: 0.3rem;
 height: 0.3rem;
 position: absolute;
 left: 0.2rem;
 top: 0.1rem;
}
.lifestyle-tc .fanghui > img {
 width: 100%;
}
.lifestyle-tc > h2 {
 font-size: 0.3rem;
 width: 2.2rem;
 margin: 0.3rem auto 0;
 text-align: center;
}
.lifestyle-tc > span {
 width: 100%;
 font-size: 0.2rem;
 margin-top: 1.5rem;
 display: block;
 font-weight: 700;
 text-indent: 0.16rem;
}
.lifestyle-tc > p {
 text-indent: 0.32rem;
 font-size: 0.2rem;
}





JS代码





let searchtext = document.querySelector('.search #search_from > input');
let searchbtn = document.querySelector('.search-btn');
let information = document.querySelector('.information'); //当前天气div
let forecast = document.querySelector(".forecast"); //获取天气预报 div
let lifestyle = document.querySelector('.lifestyle');
 if (localStorage.tq == undefined) { /*如果默认没搜索过 就自动搜索普宁*/
 var tqList = [];
 let defauleCity = "普宁";
 autorend(defauleCity);
 } else { /*如果有搜索记录，就自动搜索最后一次机城市*/
 var tqList = JSON.parse(localStorage.tq);
 let endcityName = tqList[tqList.length - 1].cityName;
 autorend(endcityName);
}

 /* 自动渲染方法*/
 function autorend (cityName) {
 let nowurl = "https://free-api.heweather.net/s6/weather/now"+cityName+"&key=26be256aca2c43a7bb7f9a72e0f99a6b";
 let dailyurl = "https://free-api.heweather.net/s6/weather/forecast"+cityName+"&key=26be256aca2c43a7bb7f9a72e0f99a6b";
 let lifestyleurl = "https://free-api.heweather.net/s6/weather/lifestyle"+cityName+"&key=26be256aca2c43a7bb7f9a72e0f99a6b";
 console.log("执行自动渲染")
 rendweather(nowurl,cityName,dailyurl,lifestyleurl);
}

 function getTime() {
 let date = new Date();
 let year = date.getFullYear();
 let month = date.getMonth() + 1;
 let day = date.getDate();
 let house = date.getHours();
 house = house < 10 "年 - " + month + "月 - " + day + "日 - " + house + ":" + minutes + ":" + second;
 return time;
 }

 /*搜索按钮事件*/
 searchbtn.addEventListener('click',function () {
 let time = getTime();
 let cityName = searchtext.value;
 /*如果输入框不为空才执行 不加这条件 会导致传入一个空的字符串 导致历史记录添加到一个空的*/
 if (cityName != "") {
 let List = {
  "cityName" : cityName,
  "time" : time
 }
 tqList.push(List);
 localStorage.tq = JSON.stringify(tqList);
 rendhistory(tqList);
 let nowurl = "https://free-api.heweather.net/s6/weather/now"+cityName+"&key=26be256aca2c43a7bb7f9a72e0f99a6b";
 let dailyurl = "https://free-api.heweather.net/s6/weather/forecast"+cityName+"&key=26be256aca2c43a7bb7f9a72e0f99a6b";
 let lifestyleurl = "https://free-api.heweather.net/s6/weather/lifestyle"+cityName+"&key=26be256aca2c43a7bb7f9a72e0f99a6b";
 rendweather(nowurl,cityName,dailyurl,lifestyleurl); /*调用渲染方法*/
 searchtext.value = "";
 }
});

 /*手机键盘搜索键事件*/
 document.getElementById('search_from').onsubmit = function () {
 searchbtn.click();
 document.activeElement.blur();
 }

 /*主页面渲染*/
 function rendweather (nowurl,cityName,dailyurl,lifestyleurl) {
 /*获取今日天气信息*/
 getAjax(nowurl,function (xhr) {
  let databoj = JSON.parse(xhr.response);
  let now = databoj.HeWeather6[0].now;
  if (now == undefined) { /* 如果获取到的为now 说明用户输入的城市有误*/
  if (tqList.length > 1) {//如果长度大于1 说明之前用户正确输入过城市
   tqList.splice(tqList.length - 1 , 1 ); //执行删除最后一个元素 即输入错误的城市
   rendhistory(tqList); // 执行历史记录渲染
   cityName = tqList[tqList.length - 1].cityName; //将城市名赋值为数组最后一个元素 即最后一次正确搜索的城市
  } else if (tqList.length == 1) { /* 如果长度为1 说明现在为止用户没输入一个正确的城市*/
   cityName = "普宁"; //将城市名赋值为 普宁
   // tqList.splice(tqList.length - 1 , 1 );
   tqList.pop(); //删除输入错误的文字
   rendhistory(tqList); //执行历史记录渲染
  }
  autorend(cityName); //最后执行自动渲染
  } else { //如果以上都没错误 说明用户输入的城市正确 正常执行代码
  /* 渲染今日天气*/
  information.innerHTML = `
  <div class="now">
  <span class="city">${cityName}</span>
  <div class="situation">
  <img src="/UploadFiles/2021-04-02/${now.cond_code}.png">


以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
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