Created
December 15, 2016 13:38
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| <!doctype html> | |
| <html> | |
| <head> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <link rel="stylesheet" href="material.indigo-pink.min.css"> | |
| </head> | |
| <body> | |
| <h1>HTML Style copying demo</h1> | |
| <the-shizz>I am a button</the-shizz> | |
| <script> | |
| function copyStyles(styleElement, selectorText) { | |
| for (let sheet of document.styleSheets) { | |
| if (sheet.cssRules) { | |
| for (let rule of sheet.cssRules) { | |
| if (rule.selectorText && rule.selectorText.indexOf(selectorText) > -1) { | |
| styleElement.sheet.insertRule(rule.cssText, styleElement.sheet.cssRules.length); | |
| } | |
| } | |
| } | |
| } | |
| } | |
| class TheShizz extends HTMLElement { | |
| constructor() { | |
| super(); // duper | |
| const shadowRoot = this.attachShadow({mode: 'open'}); | |
| const styleElement = document.createElement('style'); | |
| const buttonElement = document.createElement('button'); | |
| buttonElement.classList.add('mdl-button', 'mdl-js-button'); | |
| shadowRoot.append(styleElement); | |
| shadowRoot.append(buttonElement); | |
| buttonElement.append(document.createElement('slot')); | |
| copyStyles(styleElement, 'button'); | |
| } | |
| } | |
| customElements.define('the-shizz', TheShizz); | |
| </script> | |
| </body> | |
| </html> |
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