Onshape FeatureScript Snippet Library & Cheat Sheet Community

What this tool does

FeatureScript is Onshape's language for writing your own parametric features. The documentation is complete but dense; what students and makers need is a short list of patterns that work. This library collects them: the minimal feature skeleton, dialog parameters (lengths, angles, counts, booleans, selections with filters, enums with conditional fields), creating geometry from a sketch with extrude, filleting, boolean operations, linear patterns built with a loop, moving and deleting bodies, query functions and set operations, looping over selections and measuring, validation and error messages, units and arrays, and debugging helpers.

How to use it, step by step

1. Search or pick a topic.
2. Copy the snippet.
3. Paste it into a Feature Studio in Onshape.
4. Adjust names and units, then test in a Part Studio.

Tips from the guide

• Keep the version lines Onshape writes; do not edit them casually.
• Use println and debug while developing.
• Validate inputs and throw regenError with the parameter name for clear messages.
• Name ids clearly (id + "extrude1") so queries are stable.

Common mistakes to avoid

• Mixing units (adding a number to a length).
• Using queries before the operation that creates them.
• Forgetting to import the standard library.

Who uses it

• Onshape students. Learn FeatureScript from short, correct examples.
• Makers and engineers. Automate repeated modelling tasks.
• Educators. Hand out a one-page reference.

How to ask a question people can answer

A good thread on the Onshape FeatureScript Snippet Library & Cheat Sheet saves everyone time. Start with a title that names the exact problem, such as the input you used, the result you expected and the result you got. A title like “Not working” is hard to answer, while a title with the specifics gets replies quickly.

• Say what you tried. List the steps you followed and any settings you changed, so replies do not repeat what you already did.
• Share a small example. A short sample input and the output you saw is worth more than a long description. Remove anything private first.
• Mention your setup. Your device, browser and whether you are on a phone or a computer can explain many odd results.
• One question per thread. Separate topics get clearer answers and are easier to find later with the search box above.
• Come back and reply. If a suggestion worked, say so and upvote it, and if you found the fix yourself, post it for the next person.

Community rules

Be kind, stay on topic and keep personal data out of your posts. Do not post adult, hateful or illegal content, advertising or repeated links. Every post is shown with its author’s username and date, and posts that break these rules can be hidden by moderators. This space is for help with the Onshape FeatureScript Snippet Library & Cheat Sheet and related tasks, and it is separate from the sitewide discussion forum where broader topics live.