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
Document Tq历史查询
清除历史记录生活指数
舒适度指数穿衣指数感冒指数运动指数旅游指数紫外线指数洗车指数空气污染扩散条件指数
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 = `
${cityName}
${now.cond_txt}
温度:${now.tmp}℃
体感温度:${now.fl}℃
`;
/*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 += `
${date} * ${txt}
${item.tmp_max}°/
${item.tmp_min}°
`;
})
});
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 = `
${lifestyleitem[j].children[1].childNodes[0].data}
${li.brf}
"${li.txt}"
`;
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 += `
${item.time}
${item.cityName}
`;
})
/*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脚本之家。