Function processAddUpdate

src/chart/custom/CustomView.ts:1459–1476

(
    this: DataDiffer<DiffGroupContext>,
    newIndex: number,
    oldIndex?: number
)

}

function processAddUpdate(
    this: DataDiffer<DiffGroupContext>,
    newIndex: number,
    oldIndex?: number
): void {
    const context = this.context;
    const childOption = newIndex != null ? context.newChildren[newIndex] : null;
    const child = oldIndex != null ? context.oldChildren[oldIndex] : null;

    doCreateOrUpdateEl(
        context.api,
        child,
        context.dataIndex,
        childOption,
        context.seriesModel,
        context.group
    );
}

function processRemove(this: DataDiffer<DiffGroupContext>, oldIndex: number): void {
    const context = this.context;