fix(Progress): track-color source & doc (#2175)

packages/progress/README.md

@@ -69,7 +69,8 @@
 | stroke-width | 进度条粗细，默认单位为`px` | *string \| number* | `4px` | - |
 | show-pivot | 是否显示进度文字 | *boolean* | `true` | - |
 | color | 进度条颜色 | *string* | `#1989fa` | - |
-| text-color | 进度条文字颜色 | *string* | `#fff` | - |
+| text-color | 进度文字颜色 | *string* | `#fff` | - |
+| track-color | 轨道颜色 | *string* | `#e5e5e5` | 1.0.0 |
 | pivot-text | 文字显示 | *string* | 百分比文字 | - |
 | pivot-color | 文字背景色 | *string* | 与进度条颜色一致 | - |
 

packages/progress/index.ts

@@ -8,6 +8,7 @@ VantComponent({
     percentage: Number,
     pivotText: String,
     pivotColor: String,
+    trackColor: String,
     showPivot: {
       type: Boolean,
       value: true

packages/progress/index.wxml

@@ -1,6 +1,9 @@
 <wxs src="./index.wxs" module="getters" />
 
-<view class="van-progress custom-class" style="height: {{ strokeWidthUnit }};">
+<view
+  class="van-progress custom-class"
+  style="height: {{ strokeWidthUnit }}; {{ trackColor ? 'background: ' + trackColor : '' }}"
+>
   <view
     class="van-progress__portion"
     style="width: {{ percentage }}%; background: {{ inactive ? '#cacaca' : color }}"