Fix zero border width not working (issue #3241)

diff --git a/src/core/core.legend.js b/src/core/core.legend.js
index 8d1fb4b7e188ba14299a295f712d5230c16a08b0..ffe42c9047e5b88a1055dddf46fd9e6f63b1eef4 100644 (file)
--- a/src/core/core.legend.js
+++ b/src/core/core.legend.js
@@ -324,7 +324,7 @@ module.exports = function(Chart) {
                                        ctx.lineJoin = itemOrDefault(legendItem.lineJoin, lineDefault.borderJoinStyle);
                                        ctx.lineWidth = itemOrDefault(legendItem.lineWidth, lineDefault.borderWidth);
                                        ctx.strokeStyle = itemOrDefault(legendItem.strokeStyle, globalDefault.defaultColor);
-                                       var isLineWidthZero = (itemOrDefault(legendItem.lineWidth, lineDefault.borderWidth) == 0);
+                                       var isLineWidthZero = (itemOrDefault(legendItem.lineWidth, lineDefault.borderWidth) === 0);
 
                                        if (ctx.setLineDash) {
                                                // IE 9 and 10 do not support line dash