wifi API 无法使用

WAService.js:3 thirdScriptError

wx.startWifi is not a function;at pages/wifi_test/wifi_test page startwifi function

TypeError: wx.startWifi is not a function

    at e.startwifi (http://127.0.0.1:9973/appservice/pages/wifi\_test/wifi\_test.js:12:8)

    at e.<anonymous> (http://127.0.0.1:9973/appservice/\_\_dev\_\_/WAService.js:9:6894)

    at e.onLoad (http://127.0.0.1:9973/appservice/pages/wifi\_test/wifi\_test.js:8:10)

    at e.<anonymous> (http://127.0.0.1:9973/appservice/\_\_dev\_\_/WAService.js:9:6355)

    at A (http://127.0.0.1:9973/appservice/\_\_dev\_\_/WAService.js:8:26514)

    at D (http://127.0.0.1:9973/appservice/\_\_dev\_\_/WAService.js:8:28184)

    at F (http://127.0.0.1:9973/appservice/\_\_dev\_\_/WAService.js:8:28450)

    at Function.<anonymous> (http://127.0.0.1:9973/appservice/\_\_dev\_\_/WAService.js:8:30455)

    at http://127.0.0.1:9973/appservice/\_\_dev\_\_/WAService.js:9:3284

    at http://127.0.0.1:9973/appservice/\_\_dev\_\_/WAService.js:4:10359

最新版本了，WiFi API 无法使用？？？？