# ChangeLog of JS API Changes in the commonlibrary Subsystem

Compared with OpenHarmony 3.2 Beta4, OpenHarmony 3.2.10.1(Mr) has the following API changes in the commonlibrary subsystem.

## cl.commonlibrary.1 Error Code and Information Change
Changed error codes and information returned by APIs of the **ArrayList**, **List**, **LinkedList**, **Stack**, **Queue**, **Deque**, **PlainArray**, **LightWeightMap**, **LightWeightSet**, **HashMap**, **HashSet**, **TreeMap**, and **TreeSet** classes in the commonlibrary subsystem.

For details about the changed error codes, see [error codes of language basic class libraries](../../../application-dev/reference/errorcodes/errorcode-utils.md).

No adaptation is required for applications developed using these APIs.

**Key API/Component Changes**

Error code information is redefined for APIs in these classes and marked using **'@throws'** in the `*.d.ts` file of the corresponding module.

The sample code is as follows:

**ArrayList** class before the change:

constructor();

**ArrayList** class after the change:

@throws { BusinessError } 10200012 - The ArrayList's constructor cannot be directly invoked.
constructor();

**Change Impacts**

None