From 3aaa131ae9d9e9c87e1394fae4d1092d8475a446 Mon Sep 17 00:00:00 2001
From: Reverier <reverier.xu@outlook.com>
Date: Thu, 16 Mar 2023 16:05:41 +0800
Subject: [PATCH] Support browser usage (#31)

Co-authored-by: Sindre Sorhus <sindresorhus@gmail.com>
---
 index.js  | 13 ++++++++++---
 readme.md | 14 ++++++++++++++
 2 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/index.js b/index.js
index e26cde0..9307dfc 100644
--- a/index.js
+++ b/index.js
@@ -5,7 +5,14 @@ const OSC = '\u001B]';
 const BEL = '\u0007';
 const SEP = ';';
 
-const isTerminalApp = process.env.TERM_PROGRAM === 'Apple_Terminal';
+/* global window */
+const isBrowser = typeof window !== 'undefined' && typeof window.document !== 'undefined';
+
+const isTerminalApp = !isBrowser && process.env.TERM_PROGRAM === 'Apple_Terminal';
+const isWindows = !isBrowser && process.platform === 'win32';
+const cwdFunction = isBrowser ? () => {
+	throw new Error('`process.cwd()` only works in Node.js, not the browser.');
+} : process.cwd;
 
 const ansiEscapes = {};
 
@@ -82,7 +89,7 @@ ansiEscapes.scrollDown = ESC + 'T';
 
 ansiEscapes.clearScreen = '\u001Bc';
 
-ansiEscapes.clearTerminal = process.platform === 'win32'
+ansiEscapes.clearTerminal = isWindows
 	? `${ansiEscapes.eraseScreen}${ESC}0f`
 	// 1. Erases the screen (Only done in case `2` is not supported)
 	// 2. Erases the whole screen including scrollback buffer
@@ -126,7 +133,7 @@ ansiEscapes.image = (buffer, options = {}) => {
 };
 
 ansiEscapes.iTerm = {
-	setCwd: (cwd = process.cwd()) => `${OSC}50;CurrentDir=${cwd}${BEL}`,
+	setCwd: (cwd = cwdFunction()) => `${OSC}50;CurrentDir=${cwd}${BEL}`,
 
 	annotation(message, options = {}) {
 		let returnValue = `${OSC}1337;`;
diff --git a/readme.md b/readme.md
index 9467a24..30f73e7 100644
--- a/readme.md
+++ b/readme.md
@@ -18,6 +18,20 @@ process.stdout.write(ansiEscapes.cursorUp(2) + ansiEscapes.cursorLeft);
 //=> '\u001B[2A\u001B[1000D'
 ```
 
+**You can also use it in the browser with Xterm.js:**
+
+```js
+import ansiEscapes from 'ansi-escapes';
+import {Terminal} from 'xterm';
+import 'xterm/css/xterm.css';
+
+const terminal = new Terminal({…});
+
+// Moves the cursor two rows up and to the left
+terminal.write(ansiEscapes.cursorUp(2) + ansiEscapes.cursorLeft);
+//=> '\u001B[2A\u001B[1000D'
+```
+
 ## API
 
 ### cursorTo(x, y?)