> For the complete documentation index, see [llms.txt](https://westsilver.gitbook.io/study-script/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://westsilver.gitbook.io/study-script/nomad-script/vanillajs/momentum/weather.md).
# Getting Weather
{% tabs %}
{% tab title="index.html" %}
```markup
Something
00:00
```
{% endtab %}
{% tab title="weather.js" %}
```javascript
const weather = document.querySelector(".js-weather");
const API_KEY = "450f72e78bda69d216bf82a702bb51b2";
const COORDS = 'coords';
function getWeather(lat, lng){
fetch(
`https://api.openweathermap.org/data/2.5/weather?lat=${lat}&lon=${lng}&appid=${API_KEY}&units=metric`
).then(function(response){
return response.json();
}).then(function(json){
const temperature = json.main.temp;
const place = json.name;
weather.innerText = `${temperature} @ ${place}`;
})
}
function saveCoords(coordsObj){
localStorage.setItem(COORDS, JSON.stringify(coordsObj));
}
function handleGeoSuccess(position) {
const latitude = position.coords.latitude;
const longitude = position.coords.longitude;
const coordsObj = {
latitude,
longitude
};
saveCoords(coordsObj);
getWeather(latitude, longitude);
}
function handleGeoError() {
console.log("Cant access geo location");
}
function askForCoords() {
navigator.geolocation.getCurrentPosition(handleGeoSuccess, handleGeoError);
}
function loadCoords(){
const loadedCoords = localStorage.getItem(COORDS);
if(loadedCoords === null){
askForCoords();
} else {
//getWeather
const parsedCoords = JSON.parse(loadedCoords);
getWeather(parsedCoords.latitude, parsedCoords.longitude);
}
}
function init(){
loadCoords();
}
init();
```
{% endtab %}
{% endtabs %}
{% hint style="warning" %}
**fetch()** 안에는 가져올 데이터가 들어감
ex) \`https\://\~\`
\*주의 : 따옴표가 아닌 **backtick(\`)**을 사용할 것!
{% endhint %}
1. navigator geolocation 메서드를 사용해 latitude(위도), longitude(경도)를 불러올 수 있음
2. fetch API를 호출할 수 있음
3. then 기본적으로 함수를 호출하는 것이지만 데이터가 완전히 들어온 다음 호출하는 특징이 있음
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://westsilver.gitbook.io/study-script/nomad-script/vanillajs/momentum/weather.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.