Created
October 26, 2017 21:25
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WebComponent playground boilerplate (just edit and refresh)
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<html> | |
<head> | |
<style> | |
body { | |
font-family: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; | |
font-weight: 300; | |
color: gray; | |
} | |
badass-list-thing { | |
width: 200px; | |
display: block; | |
border: 1px solid purple; | |
} | |
</style> | |
</head> | |
<body> | |
<badass-list-thing> | |
<div>Item 1</div> | |
<div>Item 2</div> | |
<div>Item 3</div> | |
<div>Item 4</div> | |
</badass-list-thing> | |
<p>This works in pretty much all browsers other than IE without compiling...</p> | |
<script> | |
const run = () => { | |
customElements.define('badass-list-thing', class extends HTMLElement { | |
disconnectedCallback () { | |
console.log('disconnected') | |
} | |
attributeChangedCallback () { | |
console.log('attributeChangedCallback', arguments) | |
} | |
adoptedCallback () { | |
console.log('adopted') | |
} | |
connectedCallback () { | |
console.log('connected, do something!') | |
} | |
}) | |
} | |
const ensureWebComponents = () => new Promise((resolve, reject) => { | |
if (window.customElements) { | |
return resolve() | |
} | |
function loadScript(src) { | |
return new Promise(function(resolve, reject) { | |
const script = document.createElement('script'); | |
script.src = src; | |
script.onload = resolve; | |
script.onerror = reject; | |
document.head.appendChild(script); | |
}); | |
} | |
window.addEventListener('WebComponentsReady', resolve) | |
loadScript('https://cdnjs.cloudflare.com/ajax/libs/webcomponentsjs/1.0.12/webcomponents-loader.js') | |
.catch(reject) | |
}) | |
ensureWebComponents().then(run) | |
</script> | |
</body> | |
</html> |
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