Review comments, documentation

Author: kurkle

docs/charts/line.md

@@ -52,6 +52,9 @@ The line chart allows a number of properties to be specified for each dataset. T
 | [`borderWidth`](#line-styling) | `number` | Yes | - | `3`
 | [`cubicInterpolationMode`](#cubicinterpolationmode) | `string` | Yes | - | `'default'`
 | [`fill`](#line-styling) | <code>boolean&#124;string</code> | Yes | - | `true`
+| [`hoverBackgroundColor`](#line-styling) | [`Color`](../general/colors.md) | Yes | - | `undefined`
+| [`hoverBorderColor`](#line-styling) | [`Color`](../general/colors.md) | Yes | - | `undefined`
+| [`hoverBorderWidth`](#line-styling) | `number` | Yes | - | `undefined`
 | [`label`](#general) | `string` | - | - | `''`
 | [`lineTension`](#line-styling) | `number` | - | - | `0.4`
 | [`pointBackgroundColor`](#point-styling) | `Color` | Yes | Yes | `'rgba(0, 0, 0, 0.1)'`

src/controllers/controller.line.js

@@ -316,6 +316,9 @@ module.exports = DatasetController.extend({
 		model.radius = valueOrDefault(options.hoverRadius, options.radius);
 	},
 
+	/**
+	 * @protected
+	 */
 	setDatasetHoverStyle: function() {
 		var line = this.getMeta().dataset;
 		var model = line._model;
@@ -324,10 +327,12 @@ module.exports = DatasetController.extend({
 
 		line.$previousStyle = {
 			backgroundColor: model.backgroundColor,
-			borderColor: model.borderColor
+			borderColor: model.borderColor,
+			borderWidth: model.borderWidth
 		};
 
 		model.backgroundColor = valueOrDefault(config.hoverBackgroundColor, getHoverColor(config.backgroundColor));
 		model.borderColor = valueOrDefault(config.hoverBorderColor, getHoverColor(config.borderColor));
+		model.borderWidth = valueOrDefault(config.hoverBorderWidth, config.borderWidth);
 	},
 });