From 55b6725d7b1ecd12b3feaced6d432649225712c8 Mon Sep 17 00:00:00 2001
From: Yukti Nandwana <nandwanayukti@gmail.com>
Date: Tue, 17 Mar 2026 02:32:06 +0530
Subject: [PATCH 1/2] feat: add FES warning for zero or negative textSize

---
 src/typography/attributes.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/typography/attributes.js b/src/typography/attributes.js
index d6a5eb8d5e..f815f9216a 100644
--- a/src/typography/attributes.js
+++ b/src/typography/attributes.js
@@ -191,6 +191,14 @@ p5.prototype.textLeading = function(theLeading) {
  */
 p5.prototype.textSize = function(theSize) {
   p5._validateParameters('textSize', arguments);
+
+  // New FES Warning Logic
+  if (arguments.length > 0 && theSize <= 0) {
+    p5._friendlyError(
+      `textSize() was called with a value of ${theSize}. ` +
+      'Text size must be a positive number greater than 0 to render correctly and prevent text overlapping when wrapping.'
+    );
+  }
   return this._renderer.textSize(...arguments);
 };
 

From 0a0789fa9f0aad59800ce08586bc729d2fe25be0 Mon Sep 17 00:00:00 2001
From: Yukti Nandwana <nandwanayukti@gmail.com>
Date: Wed, 18 Mar 2026 13:58:04 +0530
Subject: [PATCH 2/2] test: add unit test for zero or negative textSize FES
 warning

---
 test/unit/typography/attributes.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/test/unit/typography/attributes.js b/test/unit/typography/attributes.js
index ebfa6b552f..112e6e900d 100644
--- a/test/unit/typography/attributes.js
+++ b/test/unit/typography/attributes.js
@@ -73,6 +73,16 @@ suite('Typography Attributes', function() {
         myp5.textSize('30');
       });
     });
+    // NEW TEST ADDED
+    test('should trigger FES warning if textSize is 0 or negative', function() {
+      p5.disableFriendlyErrors = false;
+      expect(function() {
+        myp5.textSize(0);
+      }).to.generateFriendlyError();
+      expect(function() {
+        myp5.textSize(-5);
+      }).to.generateFriendlyError();
+    });
   });
 
   suite('p5.prototype.textStyle', function() {