@visactor/vrender-core/es/common/diff.js

```typescript import { xxx } from '@visactor/vrender-core'; ```

import { isEqual } from "@visactor/vutils";

export function diff(oldAttrs, newAttrs, getAttr) {
    const diffObj = {};
    for (const key in newAttrs) key in oldAttrs && isEqual(oldAttrs[key], newAttrs[key]) || (diffObj[key] = newAttrs[key]);
    if (getAttr) for (const key in oldAttrs) if (!(key in newAttrs)) {
        const value = getAttr(key);
        void 0 !== value && (diffObj[key] = value);
    }
    return diffObj;
}