fix: set default position to be bottom

src/component/toolbox/ToolboxView.js

@@ -170,7 +170,8 @@ export default echarts.extendComponentView({
                             name: iconName,
                             title: titles[iconName],
                             $vars: ['name', 'title']
-                        }
+                        },
+                        position: tooltipModel.get('position', true) || 'bottom'
                     }, tooltipModel.option));
                 }
 

test/toolbox-tooltip.html

@@ -82,7 +82,7 @@ under the License.
                     tooltip: {
                         show: true,
                         formatter: function (param) {
-                            return param.title;
+                            return '<div>' + param.title + '</div><div class="triangle"></div>';
                         },
                         backgroundColor: '#222',
                         textStyle: {