react

react 滚动到指定元素位置,类似锚点功能

2018-11-28  本文已影响0人  小明_4f28

组件

class HomeView extends Component {

  scrollToAnchor = (anchorName) => {
    if (anchorName) {
        let anchorElement = document.getElementById(anchorName);
        if(anchorElement) { anchorElement.scrollIntoView(); }
    }
  }

  render() {

    return (
      <div>
        <div className="android-be-together-section mdl-typography--text-center">
          <div className="logo-font android-slogan">be together. not the same.</div>
          <div className="logo-font android-sub-slogan">welcome to android... be yourself. do your thing. see what's going on.</div>
          <div className="logo-font android-create-character">
            <a href=""><img src="images/andy.png" /> create your android character</a>
          </div>

          <a onClick={()=>this.scrollToAnchor('screens')}>
            <button className="android-fab mdl-button mdl-button--colored mdl-js-button mdl-button--fab mdl-js-ripple-effect">
              <i className="material-icons">expand_more</i>
            </button>
          </a>
        </div>
        <div className="mdl-grid" style={{height: 800}}>
          <a id="screens"></a>
          跳到这里
          <br />
        </div>
      </div>
    );
  }
}
export default HomeView;

scrollIntoView的语法

用法如下:
element.scrollIntoView();
element.scrollIntoView(true);
element.scrollIntoView(alignToTop);
element.scrollIntoView(scrollIntoViewOptions);

alignToTop是一个布尔值,true 元素对齐到祖先元素的顶部,false 元素对齐到祖先元素的底部,默认是true
scrollIntoViewOptions是一个布尔值或以下选项的对象:

{
     behavior: 'auto' | 'instant' | 'smooth',
     block: 'start' | 'end'
}
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