Why Aren\'t My ANSI Colors Working in Windows 10?

Ansi Colors Not Functioning in Windows 10?

In the realm of Windows, the ability to display colors on the console is a relatively new and thrilling feature. However, amidst the excitement, certain users have encountered a puzzling issue where the expected color output suddenly vanished. This article aims to elucidate the cause and provide a solution.

Windows Console Color Conundrum

One such user experiences this problem when running a program that utilizes ANSI color escapes. The perplexing part is that the same binary outputs colors correctly on another laptop. On the affected machine, the console window, despite displaying colors properly when launched from the Node.js application, fails to do so for other programs. This suggests some underlying system-level inconsistencies.

The Role of Virtual Terminal Processing

To delve into the solution, we must first comprehend the concept of virtual terminal processing in Windows. This feature, which was introduced in an update, enables advanced terminal capabilities that are essential for properly rendering ANSI colors. Unfortunately, it is disabled by default.

Enabling Virtual Terminal Processing

To resolve the issue, it is necessary to enable virtual terminal processing on your Windows machine. This can be achieved by adding an initialization file (e.g., init_windows.go) that sets this option. The following code sample demonstrates how to do this:

<code class="go">// +build windows

package main

import (
    "os"

    "golang.org/x/sys/windows"
)

func init() {
    stdout := windows.Handle(os.Stdout.Fd())
    var originalMode uint32

    windows.GetConsoleMode(stdout, &originalMode)
    windows.SetConsoleMode(stdout, originalMode|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING)
}</code>

By incorporating this code into your program, you can ensure that virtual terminal processing is enabled, allowing your application to display ANSI colors correctly on Windows 10.

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