Fix handling of null labels (#4795)

diff --git a/src/core/core.scale.js b/src/core/core.scale.js
index 89df4304b5b2d8c7735c707f38beb5b80a135efe..ffe13cbff8248150b9299bcb3ab7f75d7dbfe34e 100644 (file)
--- a/src/core/core.scale.js
+++ b/src/core/core.scale.js
@@ -662,7 +662,7 @@ module.exports = function(Chart) {
 
                                // Since we always show the last tick,we need may need to hide the last shown one before
                                shouldSkip = (skipRatio > 1 && i % skipRatio > 0) || (i % skipRatio === 0 && i + skipRatio >= tickCount);
-                               if (shouldSkip && i !== tickCount - 1 || helpers.isNullOrUndef(tick.label)) {
+                               if (shouldSkip && i !== tickCount - 1) {
                                        // leave tick in place but make sure it's not displayed (#4635)
                                        delete tick.label;
                                }
@@ -712,7 +712,7 @@ module.exports = function(Chart) {
 
                        helpers.each(ticks, function(tick, index) {
                                // autoskipper skipped this tick (#4635)
-                               if (tick.label === undefined) {
+                               if (helpers.isNullOrUndef(tick.label)) {
                                        return;
                                }