From 77885ed63d2b88004e0272845f9a92a4e08308e0 Mon Sep 17 00:00:00 2001
From: Daniel Imms <2193314+Tyriar@users.noreply.github.com>
Date: Mon, 4 Nov 2024 09:47:26 -0800
Subject: [PATCH] Set liga font feature when ligatures is enabled

Fixes #5207
---
 addons/addon-ligatures/src/LigaturesAddon.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/addons/addon-ligatures/src/LigaturesAddon.ts b/addons/addon-ligatures/src/LigaturesAddon.ts
index cb589303..47fbc323 100644
--- a/addons/addon-ligatures/src/LigaturesAddon.ts
+++ b/addons/addon-ligatures/src/LigaturesAddon.ts
@@ -31,8 +31,12 @@ export class LigaturesAddon implements ITerminalAddon , ILigaturesApi {
   }
 
   public activate(terminal: Terminal): void {
+    if (!terminal.element) {
+      throw new Error('Cannot activate LigaturesAddon before open is called');
+    }
     this._terminal = terminal;
     this._characterJoinerId = enableLigatures(terminal, this._fallbackLigatures);
+    terminal.element.style.fontFeatureSettings = '"liga" on, "calt" on';
   }
 
   public dispose(): void {
@@ -40,5 +44,8 @@ export class LigaturesAddon implements ITerminalAddon , ILigaturesApi {
       this._terminal?.deregisterCharacterJoiner(this._characterJoinerId);
       this._characterJoinerId = undefined;
     }
+    if (this._terminal?.element) {
+      this._terminal.element.style.fontFeatureSettings = '';
+    }
   }
 }