Document Object ModelElementInstance propertiesariaAtomicariaAutoCompleteariaBrailleLabelariaBrailleRoleDescriptionariaBusyariaCheckedariaColCountariaColIndexariaColIndexText Experimental ariaColSpanariaCurrentariaDescriptionariaDisabledariaExpandedariaHasPopupariaHiddenariaKeyShortcutsariaLabelariaLevelariaLiveariaModalariaMultiLineariaMultiSelectableariaOrientationariaPlaceholderariaPosInSetaria
利用規約など最後までスクロールしなければ次へ進めない機能を実装する。 scrollTop, scrollHeight を使用して検出できる。 scrollTop : スクロール可能な領域の上端から現在表示している領域の上端までの距離 scrollHeight : スクロール可能な領域全体の高さ それに jQuery などで取得した表示領域の高さ height を組み合わせる。 scrollTop はスクロールとともに増加する。 一番下までスクロールされると scrollTop と height の合計値が scrollHeight に一致する。 計算は要素がスクロールされている間、発生し続ける scroll イベントを使う。 $('element').on('scroll', function() { console.log('スクロールされています'); }); 以下が動作するサンプル。
Webページやアプリ用のマルチスクリーン対応の柔軟なレイアウトを簡単に実装できるjQuery, React, Angularに対応したスクリプトを紹介します。 Golden Layout Golden Layout -GitHub Golden Layoutの特徴 Golden Layoutのデモ Golden Layoutの使い方 Golden Layoutの特徴 Golden LayoutはjQuery, React, Angularに対応したMITライセンスのレイアウト マネージャーです。 ネイティブのポップアップウインドウ デザインはテーマで簡単に変更可能 包括的なAPI パワフルな持続性 IE8+, Firefox, Chrome対応 Golden Layoutのデモ デモではGolden Layoutで実装されたレイアウトのHTML, CSS, JSをカスタマイズすることもでき
Introduction React enables to create components by invoking the React.createClass() method which expects a render method and triggers a lifecycle that can be hooked into via a number of so called lifecycle methods. This short article should shed light into all the applicable functions. Understanding the component lifecycle will enable you to perform certain actions when a component is created or d
Dealing with scroll position when you insert content is usually a difficult problem to solve. We'll see how to use React life cycle methods to solve it elegantly. Insertion at the bottom The first example is to maintain the scroll position at the bottom when an element is inserted at the bottom. A common use case is a chat application. In order to scroll at the bottom, we can do that on componentD
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ProductQuickly review changed methods and functions in your pull requestsThe biggest barrier to code review is often time, but there's a new way to easily understand how changes impact your code. Now you can navigate to changed methods and… The biggest barrier to code review is often time, but there’s a new way to easily understand how changes impact your code. Now you can navigate to changed meth
One of my main goals, whenever I'm teaching or writing technical content, is to maximize "aha" moments. An "aha" moment is a moment of sudden insight or clarity; when the subject matter suddenly makes sense. We've all experienced them, and the best teachers I know can understand their audience and adapt the lesson to maximize these moments. Throughout the last few years, I've taught React in just
For the record, asking someone these questions probably isn't the best way to get a deep understanding of their experience with React. React Interview Questions just seemed like a better title than Things you may or may not need to know in React, but you may find helpful none the less. What happens when you call setState? The first thing React will do when setState is called is merge the object yo
You won't get very far into learning React until you hear it – "React is declarative". But, what does that even mean? If you try to dive deeper, you inevitably come across a definition that looks something like this, comparing it to imperative programming. Imperative vs Declarative ProgrammingImperative programming is how you do something, and declarative programming is more like what you do. That
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