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excalidraw/CONTRIBUTING.md
Gasim Gasimzada 862231da4f Make all operations on elements array immutable (#283)
* Make scene functions return array instead of mutate array

- Not all functions were changes; so the given argument was a new array to some

* Make data restoration functions immutable

- Make mutations in App component

* Make history actions immutable

* Fix an issue in change property that was causing elements to be removed

* mark elements params as readonly & remove unnecessary copying

* Make `clearSelection` return a new array

* Perform Id comparisons instead of reference comparisons in onDoubleClick

* Allow deselecting items with SHIFT key

- Refactor hit detection code

* Fix a bug in element selection and revert drag functionality

Co-authored-by: David Luzar <luzar.david@gmail.com>
2020-01-09 16:22:04 +01:00

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# Contributing
## Setup
### Option 1 - Manual
1. Fork and clone the repo
1. Run `npm install` to install dependencies
1. Create a branch for your PR with `git checkout -b your-branch-name`
> To keep `master` branch pointing to remote repository and make
> pull requests from branches on your fork. To do this, run:
>
> ```sh
> git remote add upstream https://github.com/excalidraw/excalidraw.git
> git fetch upstream
> git branch --set-upstream-to=upstream/master master
> ```
### Option 2 - Codesandbox
1. Go to https://codesandbox.io/s/github/excalidraw/excalidraw
1. Connect your Github account
1. Go to Git tab on left side
1. Tap on `Fork Sandbox`
1. Write your code
1. Commit and PR automatically