fix(transformer): 循环中的 key 会自动从 item 中取值

Author: yuche

packages/taro-transformer-wx/__tests__/loop.spec.ts

@@ -1978,7 +1978,7 @@ describe('loop', () => {
                           </navigator>
                       </block>
                       <block wx:else>
-                          <navigator wx:key=\"item.$original.id\">
+                          <navigator wx:key=\"$original.id\">
                               <view>2</view>
                           </navigator>
                       </block>
@@ -2626,7 +2626,7 @@ describe('loop', () => {
           )
         })
 
-        expect(template).toMatch(`wx:key="item.id"`)
+        expect(template).toMatch(`wx:key="id"`)
       })
 
       test('callee 支持复杂表达式', () => {

packages/taro-transformer-wx/src/jsx.ts

@@ -197,7 +197,16 @@ export function parseJSXElement (element: t.JSXElement): string {
           ) {
             value = `{= ${code} =}`
           } else {
-            value = isBindEvent || isAlipayEvent || name === Adapter.key ? code : `{{${code}}}`
+            if (Adapter.key === name) {
+              const splitCode = code.split('.')
+              if (splitCode.length > 1) {
+                value = splitCode.slice(1).join('.')
+              } else {
+                value = code
+              }
+            } else {
+              value = isBindEvent || isAlipayEvent ? code : `{{${code}}}`
+            }
           }
           if (Adapter.type === Adapters.swan && name === Adapter.for) {
             value = code