Created
September 9, 2017 00:51
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HTML basics part 1 (Blog post)
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<html> | |
<body> | |
<template id="info-card"> | |
</template> | |
<script> | |
class XInfoCard extends HTMLElement { | |
// Monitor the 'message' attribute for changes. | |
static get observedAttributes() { return ['message']; } | |
// Respond to attribute changes. | |
attributeChangedCallback(attr, oldValue, newValue) { | |
if (attr == 'message') { | |
this.textContent = newValue; | |
} | |
} | |
createdCallback(){ | |
let infoCard = document.querySelector('#info-card'); | |
let infoCardInstance = document.importNode(infoCard.content, true); | |
var root = this.createShadowRoot(); //create a new shadow root | |
root.appendChild(infoCardInstance); //append the cloned template to the ShadowRoot | |
}; | |
} | |
customElements.define('x-info-card', XInfoCard); | |
</script> | |
<x-info-card message="hello world!"></x-info-card> | |
</body> | |
</html> |
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