susiwen8 commented on a change in pull request #16225:
URL: https://github.com/apache/echarts/pull/16225#discussion_r771218134



##########
File path: src/animation/customGraphicKeyframeAnimation.ts
##########
@@ -0,0 +1,161 @@
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*/
+
+import { AnimationEasing } from 'zrender/src/animation/easing';
+import Element from 'zrender/src/Element';
+import { keys, filter, each, isArray } from 'zrender/src/core/util';
+import { ELEMENT_ANIMATABLE_PROPS } from './customGraphicTransition';
+import { AnimationOption, AnimationOptionMixin, Dictionary } from 
'../util/types';
+import { Model } from '../echarts.all';
+import { getAnimationConfig } from './basicTrasition';
+import { warn } from '../util/log';
+import { makeInner } from '../util/model';
+
+// Helpers for creating keyframe based animations in custom series and graphic 
components.
+
+type AnimationKeyframe<T extends Record<string, any>> = T & {
+    easing?: AnimationEasing
+    percent?: number    // 0 - 1
+};
+
+type StateToRestore = Dictionary<any>;
+const getStateToRestore = makeInner<StateToRestore, Element>();
+
+export interface ElementKeyframeAnimationOption<Props extends Record<string, 
any>> extends AnimationOption {
+    // Animation configuration for keyframe based animation.
+    loop?: boolean
+    keyframes?: AnimationKeyframe<Props>[]
+}
+
+/**
+ * Stopped previous keyframe animation and restore the attributes.
+ * Avoid new keyframe animation starts with wrong internal state when the 
percent: 0 is not set.
+ */
+export function stopPreviousKeyframeAnimationAndRestore(el: Element) {
+    // Stop previous keyframe animation.
+    el.stopAnimation('keyframe');
+    // Restore
+    el.attr(getStateToRestore(el));
+}
+
+export function applyKeyframeAnimation<T extends Record<string, any>>(
+    el: Element,
+    animationOpts: ElementKeyframeAnimationOption<T> | 
ElementKeyframeAnimationOption<T>[],
+    animatableModel: Model<AnimationOptionMixin>
+) {
+    if (!animatableModel.isAnimationEnabled() || !animationOpts) {
+        return;
+    }
+
+    if (isArray(animationOpts)) {
+        each(animationOpts, singleAnimationOpts => {
+            applyKeyframeAnimation(el, singleAnimationOpts, animatableModel);
+        });
+        return;
+    }
+
+    const keyframes = animationOpts.keyframes;
+    let duration = animationOpts.duration;
+
+    if (animatableModel && duration == null) {
+        const config = getAnimationConfig('enter', animatableModel, 0);
+        duration = config && config.duration;
+    }
+
+    if (!keyframes || !duration) {
+        return;
+    }
+
+    const stateToRestore: StateToRestore = getStateToRestore(el);
+
+    each(ELEMENT_ANIMATABLE_PROPS, (targetPropName) => {
+        if (targetPropName && !(el as any)[targetPropName]) {
+            return;
+        }
+
+        let animator: ReturnType<Element['animate']>;
+        let endFrameIsSet = false;
+
+        // Sort keyframes by percent.
+        keyframes.sort((a, b) => a.percent - b.percent);
+
+        each(keyframes, kf => {
+            // Stop current animation.
+            const animators = el.animators;
+            const kfValues = targetPropName ? kf[targetPropName] : kf;
+
+            if (__DEV__) {
+                if (kf.percent >= 1) {
+                    endFrameIsSet = true;
+                }
+            }
+
+            if (!kfValues) {
+                return;
+            }
+
+            let propKeys = keys(kfValues);
+            if (!targetPropName) {
+                // PENDING performance?
+                propKeys = filter(
+                    propKeys, key => key !== 'percent' && key !== 'easing'
+                    && key !== 'shape' && key !== 'style' && key !== 'extra'
+                );

Review comment:
       It's better to use `include`?
   ```ts
   !['percent', 'easing', 'shape', 'style', 'extra'].include(key)
   ```




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