# Custom expression in expression editor

**URL:** <https://community.tulip.co/t/custom-expression-in-expression-editor/5352>\
**Category:** Developer\
**Tags:** custom-widgets\
**Created:** [May 25, 2022, 1:51am UTC](https://community.tulip.co/t/custom-expression-in-expression-editor/5352 "2022-05-25T01:51:08Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![youri.regnaud](https://sea2.discourse-cdn.com/flex020/user_avatar/community.tulip.co/youri.regnaud/32/2917_2.png) [@youri.regnaud](https://community.tulip.co/u/youri.regnaud)\
**Post date:** [May 25, 2022, 1:51am UTC](https://community.tulip.co/t/custom-expression-in-expression-editor/5352/1 "2022-05-25T01:51:08Z")

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Hi,

After custom widget, maybe add possibility to create custom expression available in expression editor?

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**Author:** ![mglidden](https://sea2.discourse-cdn.com/flex020/user_avatar/community.tulip.co/mglidden/32/3894_2.png) [@mglidden](https://community.tulip.co/u/mglidden)\
**Post date:** [May 25, 2022, 11:15am UTC](https://community.tulip.co/t/custom-expression-in-expression-editor/5352/2 "2022-05-25T11:15:27Z")

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@youri.regnaud Hmm, interesting idea. Are you thinking that you would write the expressions in Javascript as well?

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**Author:** ![youri.regnaud](https://sea2.discourse-cdn.com/flex020/user_avatar/community.tulip.co/youri.regnaud/32/2917_2.png) [@youri.regnaud](https://community.tulip.co/u/youri.regnaud)\
**Post date:** [May 25, 2022, 11:18am UTC](https://community.tulip.co/t/custom-expression-in-expression-editor/5352/3 "2022-05-25T11:18:02Z")

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Yes, exactly in JavaScript and use the same language we use in NodeRed

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<div class="post-metadata">

**Author:** ![mglidden](https://sea2.discourse-cdn.com/flex020/user_avatar/community.tulip.co/mglidden/32/3894_2.png) [@mglidden](https://community.tulip.co/u/mglidden)\
**Post date:** [May 26, 2022, 7:58pm UTC](https://community.tulip.co/t/custom-expression-in-expression-editor/5352/4 "2022-05-26T19:58:00Z")

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@youri.regnaud Got it. We’ve been doing a lot of thinking about how to strategically bring in ways to have custom code in Apps. More to come!

Unrelated – I heard that you’ll be at Hannover next week? I’ll be at the Tulip booths on Mon & Tue, would be great to say hi

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**Author:** ![youri.regnaud](https://sea2.discourse-cdn.com/flex020/user_avatar/community.tulip.co/youri.regnaud/32/2917_2.png) [@youri.regnaud](https://community.tulip.co/u/youri.regnaud)\
**Post date:** [May 27, 2022, 5:07am UTC](https://community.tulip.co/t/custom-expression-in-expression-editor/5352/5 "2022-05-27T05:07:54Z")

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I hope to have the opportunity to meet you