Anchor 优化

+ using `document.getElementById` instead of `document.querySelector`
+ ink will scroll to target position directly

components/anchor/AnchorLink.tsx

@@ -28,6 +28,8 @@ export default class AnchorLink extends React.Component<AnchorLinkProps, any> {
     prefixCls: 'ant-anchor',
   };
 
+  private _component: Element;
+
   context: {
     anchorHelper: AnchorHelper;
   };
@@ -42,24 +44,46 @@ export default class AnchorLink extends React.Component<AnchorLinkProps, any> {
     };
   } 
 
+  setActiveAnchor() {
+    const { bounds, href, affix } = this.props;
+    const { anchorHelper } = this.context;
+    const active = affix && anchorHelper && anchorHelper.getCurrentAnchor(bounds) === href;
+    if (active && anchorHelper) {
+      anchorHelper.setActiveAnchor(this._component);
+    }
+  }
+
+  componentDidMount() {
+    this.setActiveAnchor();
+  }
+
+  componentDidUpdate() {
+    this.setActiveAnchor();
+  }
+
   renderAnchorLink = (child) => {
     const { href } = child.props;
     if (href) {
       this.context.anchorHelper.addLink(href);
       return React.cloneElement(child, {
-        onClick: this.context.anchorHelper.scrollTo,
+        onClick: this.props.onClick,
         prefixCls: this.props.prefixCls,
+        affix: this.props.affix,
       });
     }
     return child;
   }
 
+  refsTo = (component) => {
+    this._component = component;
+  }
+
   scrollTo = (e) => {
     const { onClick, href } = this.props;
     const { anchorHelper } = this.context;
     e.preventDefault();
     if (onClick) {
-      onClick(href);
+      onClick(href, this._component);
     } else {
       e.stopPreventDefault();
       const scrollToFn = anchorHelper ? anchorHelper.scrollTo : scrollTo;
@@ -78,7 +102,7 @@ export default class AnchorLink extends React.Component<AnchorLinkProps, any> {
     return (
       <div className={cls}>
         <a
-          ref={(component) => component && active && anchorHelper ? anchorHelper.setActiveAnchor(component) : null}
+          ref={this.refsTo}
           className={`${prefixCls}-link-title`}
           onClick={this.scrollTo}
           href={href}

components/anchor/anchorHelper.tsx

@@ -37,9 +37,9 @@ export function getOffsetTop(element): number {
   return rect.top;
 }
 
-export function scrollTo(href, target = getDefaultTarget) {
+export function scrollTo(href, target = getDefaultTarget, callback) {
   const scrollTop = getScroll(target(), true);
-  const targetElement = document.querySelector(href);
+  const targetElement = document.getElementById(href.substring(1));
   if (!targetElement) {
     return;
   }
@@ -52,6 +52,8 @@ export function scrollTo(href, target = getDefaultTarget) {
     window.scrollTo(window.pageXOffset, easeInOutCubic(time, scrollTop, targetScrollTop, 450));
     if (time < 450) {
       reqAnimFrame(frameFunc);
+    } else {
+      callback();
     }
   };
   reqAnimFrame(frameFunc);
@@ -86,7 +88,7 @@ class AnchorHelper {
   getCurrentAnchor(bounds = 5) {
     let activeAnchor = '';
     this.links.forEach(section => {
-      const target = document.querySelector(section);
+      const target = document.getElementById(section.substring(1));
       if (target) {
         const top = getOffsetTop(target);
         const bottom = top + target.clientHeight;
@@ -99,8 +101,8 @@ class AnchorHelper {
     return this._activeAnchor;
   }
 
-  scrollTo(href, target = getDefaultTarget) {
-    scrollTo(href, target);
+  scrollTo(href, target = getDefaultTarget, callback = () => {}) {
+    scrollTo(href, target, callback);
   }
 }
 

components/anchor/index.tsx

@@ -34,11 +34,13 @@ export default class Anchor extends React.Component<AnchorProps, any> {
 
   private scrollEvent: any;
   private anchorHelper: AnchorHelper;
+  private _avoidInk: boolean;
 
   constructor(props) {
     super(props);
     this.state = {
       activeAnchor: null,
+      animated: true,
     };
     this.anchorHelper = new AnchorHelper();
   }
@@ -68,7 +70,9 @@ export default class Anchor extends React.Component<AnchorProps, any> {
   }
 
   componentDidUpdate() {
-    this.updateInk();
+    if (!this._avoidInk) {
+      this.updateInk();
+    }
   }
 
   updateInk = () => {
@@ -78,12 +82,22 @@ export default class Anchor extends React.Component<AnchorProps, any> {
     }
   }
 
+  clickAnchorLink = (href, component) => {
+    this.refs.ink.style.transition = 'top 0.01s ease-in-out';
+    this._avoidInk = true;
+    this.refs.ink.style.top = `${component.offsetTop + component.clientHeight / 2 - 4.5}px`;
+    this.anchorHelper.scrollTo(href, getDefaultTarget, () => {
+      this.refs.ink.style.transition = 'top 0.3s ease-in-out';
+      this._avoidInk = false;
+    });
+  }
+  
   renderAnchorLink = (child) => {
     const { href } = child.props;
     if (href) {
       this.anchorHelper.addLink(href);
       return React.cloneElement(child, {
-        onClick: this.anchorHelper.scrollTo,
+        onClick: this.clickAnchorLink,
         prefixCls: this.props.prefixCls,
         bounds: this.props.bounds,
         affix: this.props.affix,
@@ -94,9 +108,10 @@ export default class Anchor extends React.Component<AnchorProps, any> {
 
   render() {
     const { prefixCls, offsetTop, style, className = '', affix } = this.props;
-    const { activeAnchor } = this.state;
+    const { activeAnchor, animated } = this.state;
     const inkClass = classNames({
       [`${prefixCls}-ink-ball`]: true,
+      animated,
       visible: !!activeAnchor,
     });
 

components/anchor/style/index.less

@@ -29,8 +29,8 @@
         border-radius: 9px;
         border: 3px solid @primary-color;
         background-color: white;
-        transition: top .3s ease-in-out;
         left: 50%;
+        transition: top .3s ease-in-out;
         transform: translateX(-50%);
         &.visible {
           display: inline-block;