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September 5, 2017 10:06
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Web component custom elements
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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; | |
} | |
} | |
} |
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