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@sygnas/scroll-inview

v3.4.0

Published

Scroll in viewport add data attribute.

Downloads

16

Readme

syg-scroll-inview

Scroll in viewport add data attribute.

Description

スクロールしてビューポートに入ったら data-invew 属性を true にする。

画面に入ったらエフェクトを加えたいけど、余計な機能は不要、cssは自分で書く、という人向け。

Release

  • 2021.12.28
    • メンバー onInviewFunc を追加
  • 2021.11.27
    • ブラウザ用は削除
  • 2021.14.21
    • IE11非対応にし、InterscrtionObserver方式のみ対応。
    • data-inview-margin属性を廃止。
    • 個別に InterscrtionObserver のオプションを指定できるように data-inview-rootMargindata-inview-root属性を追加
  • 2020.05.02
    • data-inview-margin属性、data-inview-threshold属性を追加。
  • 2019.11.11
    • オプションを intersectionObserver に合わせた方式に変更。
    • 上記にあわせoffset値はマイナスをデフォルトに変更。
  • 2019.8.27
    • intersectionObserver に対応。

Usage

Install

npm install --save @sygnas/scroll-inview

html / JS / css

<div class="js-inview .inview">foo</div>
<div class="js-inview .inview" data-inview-threshold="1">bar</div>
import ScrollInView from '@sygnas/scroll-inview';

const inview = new ScrollInView($('.js-inview'));

inview.onInviewFunc = elm => {
  console.log('画面に入った', elm);
}

inview.start();
.inview{
    opacity: 0;
    transform: translateY(20px);
    transition: .2s;

    // ビューポートに入ると data-inview属性が「true」になるので、
    // エレメントを表示させる
    &[data-inview = "true"]{
        opacity: 1;
        transform: translateY(0);
    }
}

Methods

コンストラクタ

syg-scroll-inview のインスタンスを作成。

const inview = new ScrollInView('.js-inview');

IntersectionObserver() のオプションを指定できる。 https://developer.mozilla.org/ja/docs/Web/API/IntersectionObserver

const option = {
  rootMargin: '-10%'
};
const inview = new ScrollInView('.js-inview', option);

start()

スクロールの監視を開始する。

inview.start();

Attributes

data属性で個別に option を指定できる。

<div class="js-inview .inview" data-inview-threshold="1">bar</div>

| 属性 | デフォルト | 機能 | | --- | --- | --- | | data-inview-root | null | IntersectionObserver の root | | data-inview-rootMargin | '0px' | IntersectionObserver の rootMargin | | data-inview-threshold | 0 | IntersectionObserver の threshold |

Members

onInviewFunc

ターゲットエレメントが画面に入った時に呼び出される関数を指定。

const inview = new ScrollInView($('.js-inview'));

inview.onInviewFunc = elm => {
  console.log('画面に入った', elm);
}

License

MIT