fix(#2212): fix when slider option has no start or end

src/chart/controller/slider.ts

@@ -77,8 +77,8 @@ export default class Slider extends Controller<Option> {
       }
       // changeData 的时候同样需要更新
       // 设置初始的 text
-      const min = this.slider.component.get('start');
-      const max = this.slider.component.get('end');
+      const min = this.slider.component.get('start') || 0;
+      const max = this.slider.component.get('end') || 1;
 
       this.updateMinMaxText(min, max);
     } else {

src/chart/view.ts

@@ -639,7 +639,7 @@ export class View extends Base {
     // 对于内置的 option，避免覆盖。
     // name 在原型上，说明可能是内置 API，存在 option 被覆盖的风险，不处理
     if (View.prototype[name]) {
-      throw new Error(`Can't built in variable name "${name}", please change another one.`);
+      throw new Error(`Can't use built in variable name "${name}", please change another one.`);
     }
 
     // 存入到 option 中

tests/bugs/2212-spec.ts

@@ -0,0 +1,36 @@
+import { Chart } from '../../src';
+import { createDiv } from '../util/dom';
+import { COMPONENT_TYPE } from '../../src/constant';
+
+describe('#2212', () => {
+  const chart = new Chart({
+    container: createDiv(),
+    height: 360,
+    autoFit: true,
+  });
+
+  const data = [
+    { Dev_Time: '2020-03-23 01:01:01', Vel_X: 10 },
+    { Dev_Time: '2020-03-23 01:02:02', Vel_X: 12 },
+    { Dev_Time: '2020-03-23 01:03:03', Vel_X: 8 },
+    { Dev_Time: '2020-03-23 01:04:04', Vel_X: 10 },
+  ];
+
+  chart.scale('Dev_Time', {
+    type: 'cat',
+  });
+
+  chart.data(data);
+  chart.interval().position('Dev_Time*Vel_X');
+
+  it('slider no start end', () => {
+    chart.option('slider', {
+    });
+
+    chart.render();
+    const slider = chart.getComponents().filter(co => co.type === COMPONENT_TYPE.OTHER)[0].component;
+
+    expect(slider.get('start')).toBe(0);
+    expect(slider.get('end')).toBe(1);
+  });
+});