# \[Solved\]Extending UI Capabilities with custom JavaScript (third-party libraries) **URL:** \ **Category:** Questions about Thunkable X\ **Created:** [August 16, 2022, 4:31am UTC](https://community.thunkable.com/t/solved-extending-ui-capabilities-with-custom-javascript-third-party-libraries/2001118 "2022-08-16T04:31:45Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![spencer.taskeryifoox](https://avatars.discourse-cdn.com/v4/letter/s/e9c0ed/32.png) [@spencer.taskeryifoox](https://community.thunkable.com/u/spencer.taskeryifoox)\ **Post date:** [August 16, 2022, 4:31am UTC](https://community.thunkable.com/t/solved-extending-ui-capabilities-with-custom-javascript-third-party-libraries/2001118/1 "2022-08-16T04:31:45Z")
I would like to know whether it is possible to extend an app UI with custom (React?) code, particularly where a third-party library might be involved. An example of using a 3rd party component would be a library that supports the embedding of a PDF viewer. Something less “chunky” would be a home-grown custom component that itself made use of some low-level library features, say gagues. Thanks! ---
**Author:** ![zander](https://avatars.discourse-cdn.com/v4/letter/z/ecb155/32.png) [@zander](https://community.thunkable.com/u/zander)\ **Post date:** [August 16, 2022, 12:22pm UTC](https://community.thunkable.com/t/solved-extending-ui-capabilities-with-custom-javascript-third-party-libraries/2001118/2 "2022-08-16T12:22:24Z")
The only way that you can use some custom javascript is by using the webviewer. ---
**Author:** ![system](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/0/f/0f59f292712368bce16ff80133ae10de8a6f27e8.png) [@system](https://community.thunkable.com/u/system)\ **Post date:** [November 14, 2022, 12:22pm UTC](https://community.thunkable.com/t/solved-extending-ui-capabilities-with-custom-javascript-third-party-libraries/2001118/3 "2022-11-14T12:22:34Z")
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