tweak: tweak bolder option to `series.emphasis.bolder` from `series.bolderWhenHover`.

src/chart/line/LineSeries.ts

@@ -42,7 +42,8 @@ type LineDataValue = OptionDataValue | OptionDataValue[];
 
 interface ExtraStateOption {
     emphasis?: {
-        scale?: boolean
+        scale?: boolean,
+        bolder?: boolean
     }
 }
 
@@ -103,8 +104,6 @@ export interface LineSeriesOption extends SeriesOption<LineStateOption, ExtraSta
     showAllSymbol?: 'auto'
 
     data?: (LineDataValue | LineDataItemOption)[]
-
-    bolderWhenHover?: boolean
 }
 
 class LineSeriesModel extends SeriesModel<LineSeriesOption> {
@@ -148,7 +147,8 @@ class LineSeriesModel extends SeriesModel<LineSeriesOption> {
         },
 
         emphasis: {
-            scale: true
+            scale: true,
+            bolder: true
         },
         // areaStyle: {
             // origin of areaStyle. Valid values:
@@ -184,9 +184,7 @@ class LineSeriesModel extends SeriesModel<LineSeriesOption> {
 
         // Disable progressive
         progressive: 0,
-        hoverLayerThreshold: Infinity,
-
-        bolderWhenHover: true
+        hoverLayerThreshold: Infinity
     };
 }
 

src/chart/line/LineView.ts

@@ -550,8 +550,8 @@ class LineView extends ChartView {
 
         setStatesStylesFromModel(polyline, seriesModel, 'lineStyle');
 
-        const bolderWhenHover = seriesModel.get('bolderWhenHover');
-        if (bolderWhenHover) {
+        const emphasisModel = seriesModel.getModel('emphasis');
+        if (emphasisModel.get('bolder')) {
             const emphasisLineStyle = polyline.getState('emphasis').style;
             // only bolder when `emphasis.lineStyle.width` is not specified
             if (emphasisLineStyle.lineWidth == null) {

test/line-boldWhenHover.html

@@ -58,9 +58,9 @@ under the License.
                         data: [28.5, 70.5, 108.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4],
                         symbolSize: 10,
                         symbol: 'square',
-                        bolderWhenHover: false,
                         emphasis: {
                             focus: 'series',
+                            //bolder: false,
                             lineStyle: {
                                 width: 5
                             }
@@ -73,7 +73,8 @@ under the License.
                         symbolSize: 10,
                         symbol: 'circle',
                         emphasis: {
-                            focus: 'series'
+                            focus: 'series',
+                            //bolder: false
                         }
                     }
                 ]