How to change the spinner speed in yacspin?

Adjust the Frequency field in the Config struct, measured in time units like milliseconds. The README notes that some spinners look better at different speeds, so experiment with values like 100ms or 200ms.

yacspin vs briandowns/spinner which should I use?

yacspin is better for real-time updates and concurrency safety, as it fixes issues in briandowns/spinner. However, briandowns/spinner might suffice for simpler, non-concurrent tasks with less configuration.

Why isn't my yacspin spinner showing colors?

Colors are disabled by default in non-TTY modes. Check TerminalMode in Config; if output is non-interactive, override it to ForceSmartTerminalMode or ensure TTY detection is functioning properly.

Can I create custom spinner animations in yacspin?

Yes, by providing your own character sets in the Config, though the README primarily showcases over 90 pre-built sets in CharSets and doesn't detail advanced custom animation creation.

How to handle multiple spinners concurrently in yacspin?

The library doesn't have built-in support for multiple spinners; you need to manage separate Spinner instances manually, which can complicate synchronization and output formatting.

What's the best way to pause and unpause a yacspin spinner?

Use the Pause() method to halt rendering, make batch configuration changes, then Unpause() to resume smoothly, as described in the README's 'Pausing for Updates' section.

yacspin — Go Terminal Spinner Library

What is yacspin?

yacspin is a Go library for creating animated spinners in terminal applications. It provides visual feedback for ongoing processes, with features like live message updates, concurrency safety, and automatic TTY detection. The library solves common issues in spinner implementations, such as message flickering and unsafe concurrent usage.

Target Audience

Go developers building command-line interfaces (CLIs) or tools that require progress indicators for long-running tasks, such as data processing, file uploads, or system operations.

Value Proposition

Developers choose yacspin for its robust API, which supports real-time message updates without sacrificing animation smoothness, along with built-in concurrency safety and extensive customization options not found in simpler spinner libraries.

Yet Another CLi Spinner; providing over 80 easy to use and customizable terminal spinners for multiple OSes

Use Cases

Best For

Adding progress indicators to CLI tools with multiple concurrent tasks
Displaying real-time status updates during file uploads or downloads
Building interactive terminal applications with smooth animations
Creating CLI tools that need to run in both TTY and non-TTY environments
Implementing task queues with success/failure visual feedback
Developing Go-based DevOps or automation scripts with user-friendly output

Not Ideal For

Projects requiring cross-language CLI tools not written in Go
Applications that output solely to log files without terminal interaction
Developers needing zero-configuration, drop-in spinner components with minimal options
Environments with strict dependency constraints that avoid external libraries like fatih/color

Pros & Cons

Pros

Dynamic Width Animation

Automatically pads spinner frames to keep message text stationary, ensuring smoother visuals as demonstrated in the README's comparison gifs between yacspin and other libraries.

Concurrency Safety

Thread-safe design allows configuration updates while the spinner is running, addressing data race issues that the README notes were present in the briandowns/spinner library.

Live Message Updates

Messages update independently of animation timing, enabling real-time progress display without sacrificing aesthetic frequency, as shown in the upload example gif.

Success/Failure States

Customizable Stop() and StopFail() methods with configurable characters and colors let spinners indicate task completion, useful for serial task status as illustrated in the README's stop and stop_fail gifs.

Cons

Configuration Overhead

With numerous Config fields like Frequency, CharSet, SuffixAutoColon, and TerminalMode, setup is more complex compared to simpler spinner libraries, potentially overwhelming for basic use cases.

Go-Exclusive Dependency

Limited to Go projects, making it unsuitable for CLI tools built in other languages, and it relies on the external fatih/color library for color mappings, adding an extra dependency.

Limited Multi-Spinner Support

The README focuses on single-spinner concurrency safety and doesn't provide built-in handling for multiple simultaneous spinners, requiring manual instance management which can be error-prone.

Frequently Asked Questions

What is yacspin?

Target Audience

Go developers building command-line interfaces (CLIs) or tools that require progress indicators for long-running tasks, such as data processing, file uploads, or system operations.

Value Proposition

Use Cases

Best For

Adding progress indicators to CLI tools with multiple concurrent tasks
Displaying real-time status updates during file uploads or downloads
Building interactive terminal applications with smooth animations
Creating CLI tools that need to run in both TTY and non-TTY environments
Implementing task queues with success/failure visual feedback
Developing Go-based DevOps or automation scripts with user-friendly output

Not Ideal For

Projects requiring cross-language CLI tools not written in Go
Applications that output solely to log files without terminal interaction
Developers needing zero-configuration, drop-in spinner components with minimal options
Environments with strict dependency constraints that avoid external libraries like fatih/color

Pros & Cons

Pros

Dynamic Width Animation

Automatically pads spinner frames to keep message text stationary, ensuring smoother visuals as demonstrated in the README's comparison gifs between yacspin and other libraries.

Concurrency Safety

Thread-safe design allows configuration updates while the spinner is running, addressing data race issues that the README notes were present in the briandowns/spinner library.

Live Message Updates

Messages update independently of animation timing, enabling real-time progress display without sacrificing aesthetic frequency, as shown in the upload example gif.

Success/Failure States

Cons

Configuration Overhead

With numerous Config fields like Frequency, CharSet, SuffixAutoColon, and TerminalMode, setup is more complex compared to simpler spinner libraries, potentially overwhelming for basic use cases.

Go-Exclusive Dependency

Limited to Go projects, making it unsuitable for CLI tools built in other languages, and it relies on the external fatih/color library for color mappings, adding an extra dependency.

Limited Multi-Spinner Support

The README focuses on single-spinner concurrency safety and doesn't provide built-in handling for multiple simultaneous spinners, requiring manual instance management which can be error-prone.

Frequently Asked Questions

yacspin

What is yacspin?

Overview

Use Cases

Best For

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions

Related Projects

Found a gem we're missing?

yacspin

What is yacspin?

Overview

Use Cases

Best For

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions

Related Projects

Found a gem we're missing?