bug fix and performance improvements

miniprogram/miniprogram_npm/tdesign-miniprogram/loading/README.en-US.md

@@ -0,0 +1,30 @@
+:: BASE_DOC ::
+
+## API
+### Loading Props
+
+name | type | default | description | required
+-- | -- | -- | -- | --
+delay | Number | 0 | \- | N
+duration | Number | 800 | \- | N
+external-classes | Array | - | `['t-class', 't-class-text', 't-class-indicator']` | N
+indicator | Boolean / Slot | true | [see more ts definition](https://github.com/Tencent/tdesign-miniprogram/blob/develop/src/common/common.ts) | N
+inherit-color | Boolean | false | \- | N
+layout | String | horizontal | options：horizontal/vertical | N
+loading | Boolean | true | \- | N
+pause | Boolean | false | \- | N
+progress | Number | - | \- | N
+reverse | Boolean | - | \- | N
+size | String | '40rpx' | \- | N
+text | String / Slot | - | [see more ts definition](https://github.com/Tencent/tdesign-miniprogram/blob/develop/src/common/common.ts) | N
+theme | String | circular | options：circular/spinner/dots | N
+
+
+### CSS Variables
+The component provides the following CSS variables, which can be used to customize styles.
+Name | Default Value | Description 
+-- | -- | --
+--td-loading-color | @brand-color | - 
+--td-loading-text-color | inherit | - 
+--td-loading-text-font-size | 24rpx | - 
+--td-loading-text-line-height | 40rpx | -