If you start with a simple file design.js, save it in a folder and use editor of your choice.

open https://openjscad.xyz/ and make sure you check the option "Enable Auto-reload"
drag and drop the file into the window and you will see the model

change your js file and save, changes will be picked-up automatically.
openjscad checks for changes every second, but if you want to see changes even faster you can use livereload.

one way to use livereload is via nodejs
if you have nodejs just run
npm -g install livereload
go to the folder with your design and run:
livereload

you must do the livereload step before you drag and drop design into openjscad window.

@z3dev Thanks, I will change to subtract(a, a, b)

@Maria-Alzate Just for your information, as part of the last release, there's a new project() function which can project a 3D shape to a 2D shape.

@geobruce Just for your information, as part of the last release, there's a new project() function which can project a 3D shape to a 2D shape.

@Alasdair-McAndrew Just for your information, as part of the last release, there's a new project() function which can project a 3D shape to a 2D shape.

@Dunk-Fordyce I really like this concept of a preconfigured project. It would be a great addition to the JSCAD project.

Probably, there are a few different styles of projects. So, maybe a little repository of starting projects could be created.

Interested?

@gilboonet excellent!

You are the super user!

@hrgdavor yes, the method I used was what was available but any other could replace it. The purpose is to get data from the embedded jscad script and create a pdf file from it that can then be downloaded or directly viewed into the browser.

@z3dev That's cool designs. Maybe you can add links to open them in JSCAD like

Which reminds me that I have such links on several places but with old site that I need to replace.

@hrgdavor Yes that's this one. (the Maker comes with a fine-point blade and a rotary blade)

@ksanger welcome

Correct. The 'OpenSCAD' conversion to JSCAD has been decommissioned. The code is very old and needs some extensive maintenance / enhancements.

Your students should be able to use the new website easily; www.openjscad.xyz

The 'syntax' to create a new design is slightly different but there's plenty of documentation.

Update: This was fixed after I upgrade the chrome to version 90.
Thanks.

@Pippo-LoVe as mentioned, JSCAD focuses on designs for 3D printing, and therefore colors are essential. Colors are assigned to a geometry / shape after completing all operations.

Colors can also be assigned to individual polygons on 3D geometries.

Having said the above, textures may be possible. But there have not been many requests for this support.