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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
<meta name="viewport" content="width=device-width"> | |
</head> | |
<body> | |
<template id="weather-info"> | |
<style> | |
:host { | |
display: inline-block; | |
padding: 1em; | |
min-width: 20em; | |
border: 1px solid grey; | |
} | |
img { | |
float: left; | |
} | |
h2 { | |
margin-top: 0; | |
line-height: 50px; | |
} | |
p { | |
clear: both; | |
font-weight: bold; | |
font-size: 1.5em; | |
} | |
</style> | |
<img> | |
<h2>Weather in <span id="city"></span>:</h2> | |
<p id="weather"></p> | |
</template> | |
<script> | |
class WeatherInfo extends HTMLElement { | |
constructor() { | |
super() | |
let doc = (document.currentScript ? document.currentScript.ownerDocument : document) | |
this._tpl = doc.getElementById('weather-info').content | |
this._shadow = this.attachShadow({mode: 'open'}) | |
} | |
get city() { | |
return this.getAttribute('city') | |
} | |
set city(value) { | |
this.setAttribute('city', value) | |
this.update() | |
} | |
get isMetric() { | |
return this.hasAttribute('metric') | |
} | |
set isMetric(value) { | |
if(value) this.setAttribute('metric', '') | |
else this.removeAttribute('metric') | |
this.update() | |
} | |
getWeather(city, isMetric) { | |
let units = (isMetric ? 'metric' : 'imperial') | |
fetch(`http://api.openweathermap.org/data/2.5/weather?q=${city}&units=${units}&appid=6fb16872c800649a6f7a568cccda7475`) | |
.then((result) => { return result.json() }) | |
.then((result) => { | |
this._shadow.getElementById('city').textContent = city | |
this._shadow.getElementById('weather').textContent = `${result.main.temp} °${isMetric ? 'C' : 'F'} - ${result.weather[0].main}` | |
this._shadow.querySelector('img').src = `http://openweathermap.org/img/w/${result.weather[0].icon}.png` | |
}) | |
} | |
update() { | |
let city = this.getAttribute('city') | |
let isMetric = this.hasAttribute('metric') | |
this.getWeather(city, isMetric) | |
} | |
connectedCallback() { | |
let content = this._tpl.cloneNode(true) | |
this._shadow.appendChild(content) | |
let city = this.getAttribute('city') | |
let isMetric = this.hasAttribute('metric') | |
this.getWeather(city, isMetric) | |
} | |
attributeChangedCallback(name, oldValue, newValue) { | |
switch(name.toLowerCase()) { | |
case 'city': | |
this.city = newValue | |
this.update() | |
break | |
case 'metric': | |
this.isMetric = newValue | |
this.update() | |
break | |
} | |
} | |
} | |
window.customElements.define('weather-info', WeatherInfo) | |
</script> | |
</body> | |
</html> |
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