# New node property and validation

**URL:** <https://discourse.nodered.org/t/new-node-property-and-validation/6673>\
**Category:** Developing Nodes\
**Created:** [10 January 2019 20:54 UTC](https://discourse.nodered.org/t/new-node-property-and-validation/6673 "2019-01-10T20:54:15Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [10 January 2019 21:51 UTC](https://discourse.nodered.org/t/new-node-property-and-validation/6673/5 "2019-01-10T21:51:45Z")

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Hi @BartButenaers. I read your post ([Upgrading Nodes specifically my own](https://discourse.nodered.org/t/upgrading-nodes-specifically-my-own/2641/11?u=bartbutenaers)) and seen from the screen shots you are debugging the onEditPrepare . How do you achieve this? I can never find the script from my .html in chrome debugger!?!  
I guess it has something to do with downloading and running node red from source instead of npm install (minified)?

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