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="images/search.png" alt=""></div> </div> <!-- 历史记录--> <div class="history"> <div class="la"> <span>历史查询</span> <img src="images/more.png" alt=""> </div> <div class="historys"> <!-- 历史记录 --> </div> <div class="clearbtn"> 清除历史记录 </div> </div> <!-- 今日天气 --> <div class="information"> </div> <!-- 天气预报 --> <div class="forecast"> </div> <!-- 生活指数 --> <div class="lifestyle"> <h2>生活指数</h2> <div class="lifestyle-box"> <div class="lifestyle-item" data-indexs="0"> <i class="iconfont icon-shushidu"></i> <span>舒适度指数</span> </div> <div class="lifestyle-item" data-indexs="1"> <i class="iconfont icon-3chuanyixiguan"></i> <span>穿衣指数</span> </div> <div class="lifestyle-item" data-indexs="2"> <i class="iconfont icon-ganmaoyaowu"></i> <span>感冒指数</span> </div> <div class="lifestyle-item" data-indexs="3"> <i class="iconfont icon-yundong"></i> <span>运动指数</span> </div> <div class="lifestyle-item" data-indexs="4"> <i class="iconfont icon-lvyou"></i> <span>旅游指数</span> </div> <div class="lifestyle-item" data-indexs="5"> <i class="iconfont icon-iconset0451"></i> <span>紫外线指数</span> </div> <div class="lifestyle-item" data-indexs="6"> <i class="iconfont icon-xiche"></i> <span>洗车指数</span> </div> <div class="lifestyle-item" data-indexs="7"> <i class="iconfont icon-kongqiwuranfenxi"></i> <span>空气污染扩散条件指数</span> </div> </div> </div> <!-- 生活指数弹窗 --> <div class="lifestyle-tc"> </div> <script src="rem.js"></script> <script src="Ajax.js"></script> <script src="tianqi.js"></script> </body> </html>
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?location="+cityName+"&key=26be256aca2c43a7bb7f9a72e0f99a6b";
let dailyurl = "https://free-api.heweather.net/s6/weather/forecast?location="+cityName+"&key=26be256aca2c43a7bb7f9a72e0f99a6b";
let lifestyleurl = "https://free-api.heweather.net/s6/weather/lifestyle?location="+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 ? '0' + house : house;
let minutes = date.getMinutes();
minutes = minutes < 10 ? '0' + minutes : minutes;
let second = date.getMinutes();
second = second < 10 ? '0' + second : second;
let time = year + "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?location="+cityName+"&key=26be256aca2c43a7bb7f9a72e0f99a6b";
let dailyurl = "https://free-api.heweather.net/s6/weather/forecast?location="+cityName+"&key=26be256aca2c43a7bb7f9a72e0f99a6b";
let lifestyleurl = "https://free-api.heweather.net/s6/weather/lifestyle?location="+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">${cityName}</span>
<div class="situation">
<img src="https://cdn.heweather.com/cond_icon/${now.cond_code}.png" alt=""> <!-- 天气图标 -->
<h1 class="text">${now.cond_txt}</h1> <!-- 天气状况 -->
<div class="temp">
<h3 class="tmp">温度:${now.tmp}℃</h3> <!-- 温度 -->
<h3 class="fl">体感温度:${now.fl}℃</h3> <!-- 体感温度 -->
</div>
</div>
`;
/*渲染背景图片*/
let nowcondtxt = now.cond_code;
switch(nowcondtxt) {
case "101":
case "102":
case "103":
case "104":
document.body.style.backgroundImage = "url('images/2.jpg')";
break;
case "100":
case "200":
case "201":
case "202":
case "203":
case "204":
document.body.style.backgroundImage = "url('images/1.jpg')";
break;
case "205":
case "206":
case "207":
case "208":
case "209":
document.body.style.backgroundImage = "url('images/7.jpg')";
break;
case "210":
case "211":
case "212":
case "213":
document.body.style.backgroundImage = "url('images/8.jpg')";
break;
case "300":
case "301":
case "302":
case "303":
case "304":
case "305":
case "306":
case "307":
case "308":
case "309":
case "310":
case "311":
case "312":
case "313":
case "314":
case "315":
case "316":
case "317":
case "318":
case "399":
document.body.style.backgroundImage = "url('images/3.jpg')";
break;
case "400":
case "401":
case "402":
case "403":
case "404":
case "405":
case "406":
case "407":
case "408":
document.body.style.backgroundImage = "url('images/4.jpg')";
break;
case "500":
case "501":
case "502":
case "503":
case "504":
case "505":
case "506":
case "507":
case "508":
document.body.style.backgroundImage = "url('images/5.jpg')";
break;
case "509":
case "510":
case "511":
case "512":
case "513":
case "514":
case "515":
document.body.style.backgroundImage = "url('images/6.jpg')";
break;
default:
document.body.style.backgroundImage = "url('images/9.jpg')";
}
/*获取天气预告信息*/
getAjax(dailyurl,function (xhr) {
forecast.innerHTML = ""; /*清除之前的渲染*/
let databoj = JSON.parse(xhr.response);
let daily = databoj.HeWeather6[0].daily_forecast;
daily.forEach(function (item,index) {
/*如果当天天气早上和晚上一样就输出一个 如果不一样 就早上转晚上（天气类型）*/
var txt = item.cond_txt_d == item.cond_txt_n ? item.cond_txt_d : item.cond_txt_d + "转" + item.cond_txt_n;
let date = '今天'; /*默认今天*/
if (index == 1) { /* 第二个赋值为明天*/
date = "明天";
} else if (index == 2) { /* 第三个赋值为后天*/
date = "后天";
}
/*渲染天气预报*/
forecast.innerHTML += `
<div class="nowday forecast-item">
<div class="forecast-situation">
<img src="https://cdn.heweather.com/cond_icon/${item.cond_code_d}.png" alt="">
${date} * <span class="txt">${txt}</span>
</div>
<div class="forecast-temp">
<span class="max">${item.tmp_max}°/</span>
<span class="min">${item.tmp_min}°</span>
</div>
</div>`;
})
});
lifestyle.style.display = 'block'; /*显示生活指数模板*/
/*获取生活指数*/
getAjax(lifestyleurl,function (xhr) {
let databoj = JSON.parse(xhr.response);
let lifestyle = databoj.HeWeather6[0].lifestyle;
lifestyleclick(lifestyle); /*调用生活指数渲染方法*/
});
}
});
}
/*生活指数渲染方法*/
let lifestyleitem = document.querySelectorAll('.lifestyle-item');
function lifestyleclick (lifestyle) {
for (let j = 0; j < lifestyleitem.length; j ++) {
lifestyleitem[j].onclick = function () {
let index = lifestyleitem[j].dataset.indexs;
let li = lifestyle[index];
let lifestyletc = document.querySelector('.lifestyle-tc');
lifestyletc.innerHTML = `<div class="fanghui">
<img src="images/fanghui.png" alt="">
</div>
<h2>${lifestyleitem[j].children[1].childNodes[0].data}</h2>
<span>${li.brf}</span>
<p>"${li.txt}"</p>`;
lifestyletc.style.display = 'block';
/*关闭按钮*/
let fanghuibtn = document.querySelector('.fanghui');
console.log(fanghuibtn);
fanghuibtn.onclick = function () {
lifestyletc.style.display = 'none';
}
}
}
}
//历史记录事件
let historys = document.querySelector('.historys');
function rendhistory(tqList) {
historys.innerHTML = ""; /*每次执行历史记录渲染都清除之前的记录 防止出现重复*/
tqList.forEach(function (item,index) {
/*将历史记录写入*/
historys.innerHTML += `
<div class="history-item" data-indexs="${index}">
<span class="history-time">${item.time}</span>
<span class="history-city">${item.cityName}</span>
</div>
`;
})
/*获取历史记录div 添加点击事件
* 点击后跳转点击的城市
* */
let historyitem = document.querySelectorAll('.history-item');
for (let j = 0; j < historyitem.length; j ++) {
historyitem[j].onclick = function() {
let index = historyitem[j].dataset.indexs;
let thecityName = tqList[index].cityName;
let time = getTime();
let List = {
"cityName" : thecityName,
"time" : time
}
tqList.push(List);
localStorage.tq = JSON.stringify(tqList);
rendhistory(tqList);
autorend(thecityName);
}
}
}
rendhistory(tqList);
xiala();
//下拉菜单事件
function xiala () {
let historybtn = document.querySelector('.la > img');
let historyDiv = document.querySelector('.history');
let clearhistory = document.querySelector('.clearbtn');
let flag = true;
historybtn.addEventListener('click',function () {
if (flag) {
flag = false;
historybtn.style.backgroundColor = "rgba(0,0,0,.3)";
let height = (tqList.length * 0.4) + 1.7;
historyDiv.style.height = height + 'rem';
} else {
flag = true;
historybtn.style.backgroundColor = "rgba(0,0,0,.0)";
historyDiv.style.height = '0.9rem';
}
});
clearhistory.addEventListener('click',function () { /*清除历史记录事件*/
localStorage.removeItem('tq'); /*删除本地存储*/
tqList = []; /*将数组清空*/
rendhistory(tqList); /*渲染历史记录*/
historybtn.click(); /*执行下拉按钮点击*/
});
searchtext.addEventListener('click',function () { //点击输入框 如果下拉菜单打开 就关闭
if (!flag) {
historybtn.click();
}
});
}
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自学编程网。
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