From 71bdd14643eb24db2cb359d6d75c2b96dd2cc5b2 Mon Sep 17 00:00:00 2001
From: william-xue <20151622+william-xue@users.noreply.github.com>
Date: Fri, 25 Sep 2026 09:08:15 +0800
Subject: [PATCH 1/2] Fix *auto* text of zero-length bar traces

A zero-length bar kept its text hidden when textposition was
*auto*, while *outside* text was drawn. Only hide text for a bar
with no position or for *inside* placement.
---
 src/traces/bar/plot.js         |  7 ++++++-
 test/jasmine/tests/bar_test.js | 24 ++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/src/traces/bar/plot.js b/src/traces/bar/plot.js
index 60f7154cf73..61279648730 100644
--- a/src/traces/bar/plot.js
+++ b/src/traces/bar/plot.js
@@ -568,10 +568,15 @@ function appendBarText(gd, plotinfo, bar, cd, i, x0, x1, y0, y1, r, overhead, op
     var hasB = calcBar.hasB;
     var barIsRounded = r && r - overhead > TEXTPAD;
 
+    // A null value has no bar to place text inside of or next to.
+    // A zero-length bar keeps a position, so `auto` text can fall through to
+    // the outside placement below.
+    var isNullBar = !isNumeric(calcBar.s1);
+
     if (
         !text ||
         textPosition === 'none' ||
-        ((calcBar.isBlank || x0 === x1 || y0 === y1) && (textPosition === 'auto' || textPosition === 'inside'))
+        ((calcBar.isBlank || x0 === x1 || y0 === y1) && (textPosition === 'inside' || isNullBar))
     ) {
         bar.select('text').remove();
         return;
diff --git a/test/jasmine/tests/bar_test.js b/test/jasmine/tests/bar_test.js
index 55ee5f3ee75..a072cb03d83 100644
--- a/test/jasmine/tests/bar_test.js
+++ b/test/jasmine/tests/bar_test.js
@@ -2261,6 +2261,30 @@ describe('A bar plot', function() {
         .then(done, done.fail);
     });
 
+    it('should draw *auto* text of zero-length bars outside', function(done) {
+        Plotly.newPlot(gd, {
+            data: [{
+                type: 'bar',
+                x: ['a', 'b', 'c'],
+                y: [0, 5, null],
+                text: ['ZERO', 'FIVE', 'NULLPT'],
+                textposition: 'auto'
+            }],
+            layout: {width: 400, height: 400, margin: {l: 0, t: 0, r: 0, b: 0}}
+        })
+        .then(function() {
+            var texts = [];
+            d3Select(gd).selectAll('.barlayer .bartext').each(function() {
+                texts.push(this.textContent);
+            });
+
+            expect(texts).toEqual(['ZERO', 'FIVE'], 'drawn bar text');
+            expect(d3Select(gd).select('.barlayer .bartext').attr('class'))
+                .toBe('bartext bartext-outside', 'zero-length bar text placement');
+        })
+        .then(done, done.fail);
+    });
+
     describe('show narrow bars', function() {
         ['initial zoom', 'after zoom out'].forEach(function(zoomStr) {
             it(zoomStr, function(done) {

From 29cab0878fc0f781ed17247cd82080b368a29b4d Mon Sep 17 00:00:00 2001
From: william-xue <20151622+william-xue@users.noreply.github.com>
Date: Fri, 25 Sep 2026 09:09:13 +0800
Subject: [PATCH 2/2] Add draft log for the zero-length bar text fix

---
 draftlogs/8078_fix.md | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 draftlogs/8078_fix.md

diff --git a/draftlogs/8078_fix.md b/draftlogs/8078_fix.md
new file mode 100644
index 00000000000..4e8e33746c6
--- /dev/null
+++ b/draftlogs/8078_fix.md
@@ -0,0 +1 @@
+ - Fix `textposition: 'auto'` text of zero-length `bar` traces [[#8078](https://github.com/plotly/plotly.js/pull/8078)]