1# Overview of ArkTS Common Library 2 3 4The ArkTS common library provides common basic capabilities, as illustrated in the figure below. 5 6 7**Figure 1** Capabilities of the ArkTS common library 8 9 10 11 12- Supporting [asynchronous concurrency and multithread concurrency](concurrency-overview.md) 13 - Supports standard JavaScript asynchronous concurrency capabilities such as Promise and async/await. 14 - Uses **TaskPool** to provide a multithread running environment for applications. The use of **TaskPool** helps reduce resource consumption and improve system performance. It also frees you from caring about the lifecycle of thread instances. 15 - Uses **Worker** to support multithread concurrency. The worker thread can communicate with the host thread. You need to proactively create and close a worker thread. 16 17- Providing common capabilities of [adding, deleting, modifying, and querying elements in containers](container-overview.md) 18 19- Constructing and parsing XML files, URLs, and URIs 20 - Extensible Markup Language (XML) is designed for data transmission and storage. The common library provides APIs for [XML generation, parsing, and conversion](xml-overview.md). 21 - [URI](../reference/apis/js-apis-uri.md) is a uniform resource identifier that uniquely identifies a resource. [URL](../reference/apis/js-apis-url.md) is a uniform resource locator that provides a path for locating a resource. 22 23- Supporting common [string and binary data processing](../reference/apis/js-apis-util.md) and [logging](../reference/apis/js-apis-logs.md) 24 - Provides APIs to encode and decode strings. 25 - Provides APIs to encode and decode Base64-encoded bytes. 26 - Supports common rational number operations, including comparing rational numbers and obtaining numerators and denominators. 27 - Provides **Scope** APIs to define the valid range of a field. 28 - Provides APIs to process binary data in scenarios such as TCP flows or file system operations. 29 - Supports logging using the console. 30 31- Providing the capability of [obtaining process information and operating processes](../reference/apis/js-apis-process.md)
