A very simple thread-safe progress bar which should work on every OS without problems. I needed a progressbar for [croc](https://github.com/schollz/croc) and everything I tried had problems, so I made another one. In order to be OS agnostic I do not plan to support [multi-line outputs](https://github.com/schollz/progressbar/issues/6).
## Install
```
go get -u github.com/schollz/progressbar/v3
```
## Usage
### Basic usage
```golang
bar:=progressbar.Default(100)
fori:=0;i<100;i++{
bar.Add(1)
time.Sleep(40*time.Millisecond)
}
```
which looks like:
### I/O operations
The `progressbar` implements an `io.Writer` so it can automatically detect the number of bytes written to a stream, so you can use it as a progressbar for an `io.Reader`.
### Progress bar with unknown length
A progressbar with unknown length is a spinner. Any bar with -1 length will automatically convert it to a spinner with a customizable spinner type. For example, the above code can be run and set the `resp.ContentLength` to `-1`.
which looks like:
### Customization
There is a lot of customization that you can do - change the writer, the color, the width, description, theme, etc. See [all the options](https://pkg.go.dev/github.com/schollz/progressbar/v3?tab=doc#Option).
