Shadow DOM and CSS
I love custom elements! I've been building UIs with them since Polymer 0.5 was announced in 2014. One of the things that I've questioned with custom elements has been Shadow DOM and its relationship to CSS. This page is an experiment for comparing custom elements with and without Shadow DOM. Press the buttons below and 1,000 spinners will be displayed on the page, when 'Light' is pressed the custo
Custom Element Best Practices  | Articles  | web.dev
Custom elements let you construct your own HTML tags. This checklist covers best practices to help you build high quality elements. Custom elements allow you to extend HTML and define your own tags. They're an incredibly powerful feature, but they're also low-level, which means it's not always clear how best to implement your own element. To help you create the best possible experiences we've put
カスタムè¦ç´ v1 - å†åˆ©ç”¨å¯èƒ½ãªã‚¦ã‚§ãƒ– コンãƒãƒ¼ãƒãƒ³ãƒˆ  | Articles  | web.dev
カスタムè¦ç´ v1 - å†åˆ©ç”¨å¯èƒ½ãªã‚¦ã‚§ãƒ– コンãƒãƒ¼ãƒãƒ³ãƒˆ コレクションã§ã‚³ãƒ³ãƒ†ãƒ³ãƒ„ã‚’æ•´ç† å¿…è¦ã«å¿œã˜ã¦ã€ã‚³ãƒ³ãƒ†ãƒ³ãƒ„ã®ä¿å˜ã¨åˆ†é¡žã‚’è¡Œã„ã¾ã™ã€‚ ウェブ デベãƒãƒƒãƒ‘ーã¯ã€ã‚«ã‚¹ã‚¿ãƒ è¦ç´ を使用ã—ã¦ã€æ–°ã—ã„ HTML タグを定義ã—ãŸã‚Šã€æ—¢å˜ã®ã‚¿ã‚°ã‚’æ‹¡å¼µã—ãŸã‚Šã€å†åˆ©ç”¨å¯èƒ½ãªã‚¦ã‚§ãƒ– コンãƒãƒ¼ãƒãƒ³ãƒˆã‚’作æˆã—ãŸã‚Šã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ カスタムè¦ç´ を使用ã™ã‚‹ã¨ã€ã‚¦ã‚§ãƒ– デベãƒãƒƒãƒ‘ーã¯æ–°ã—ã„ HTML タグを作æˆã—ãŸã‚Šã€æ—¢å˜ã® HTML ã‚¿ã‚°ã‚’æ‹¡å¼µã—ãŸã‚Šã€ä»–ã®ãƒ‡ãƒ™ãƒãƒƒãƒ‘ーãŒä½œæˆã—ãŸã‚³ãƒ³ãƒãƒ¼ãƒãƒ³ãƒˆã‚’æ‹¡å¼µã—ãŸã‚Šã§ãã¾ã™ã€‚API ã¯ã‚¦ã‚§ãƒ– コンãƒãƒ¼ãƒãƒ³ãƒˆã®åŸºç›¤ã§ã™ã€‚API ã«ã‚ˆã‚Šã€å˜ã« Vanilla JSã€HTMLã€CSS を使用ã—ã¦å†åˆ©ç”¨å¯èƒ½ãªã‚³ãƒ³ãƒãƒ¼ãƒãƒ³ãƒˆã‚’作æˆã™ã‚‹ãŸã‚ã®ã‚¦ã‚§ãƒ–標準ベースã®æ–¹æ³•ãŒæä¾›ã•ã‚Œã¾ã™ã€‚ãã®çµæžœã€ã‚¢ãƒ—リã§ã¯ã€ã‚³ãƒ¼ãƒ‰ãŒæ¸›ã‚Šã€ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«åž‹ã®ã‚³ãƒ¼ãƒ‰ãŒä½¿ç”¨ã•ã‚Œã€ã‚³ãƒ¼ãƒ‰ã®å†åˆ©ç”¨ãŒå¢—ãˆã¾ã™ã€‚ ã¯ã˜ã‚ã«
Custom Elements v1 - 1000ch.net
2016.09.16 Custom Elements v1 Custom Elements v1 ㌠Chrome ã® 54 ã‹ã‚‰ã‚µãƒãƒ¼ãƒˆã•ã‚ŒãŸã€‚ ã“ã‚Œã¾ã§ã® document.registerElement('custom-element') ã«ã‚ˆã‚‹ã‚«ã‚¹ã‚¿ãƒ è¦ç´ ã®å®šç¾©ã¯ v0 ã«ã‚ãŸã‚Šã€ v1 ã¯æ§˜ã€…ãªè¦‹ç›´ã—ãŒãªã•ã‚ŒãŸ Custom Elements ã®æ–°ã—ã„ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã§ã‚る。 定義方法ã®å¤‰æ›´ v0 document ã«ã¶ã‚‰ä¸‹ãŒã‚‹ registerElement() ã§è¦ç´ を定義ã—ã¦ããŸã€‚ registerElement() ã¯å®šç¾©ã•ã‚ŒãŸã‚«ã‚¹ã‚¿ãƒ è¦ç´ ã®ã‚³ãƒ³ã‚¹ãƒˆãƒ©ã‚¯ã‚¿ã‚’è¿”ã™ã€‚ // カスタムè¦ç´ ã®å®šç¾© const FooElement = document.registerElement('foo-element', { prototype: FooElementPrototype });
HTML Standard
Firefox63+Safari10.1+Chrome54+Opera?Edge79+Edge (Legacy)?Internet ExplorerNoFirefox Android?Safari iOS?Chrome Android?WebView Android?Samsung Internet?Opera Android? 4.13.1 Introduction This section is non-normative. Custom elements provide a way for authors to build their own fully-featured DOM elements. Although authors could always use non-standard elements in their documents, with application-
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Difference between constructor and connectedCallback in custom elements v1
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