thirdScriptError

fetch is not a function;at "pages/coming/coming" page lifeCycleMethod onLoad function

TypeError: fetch is not a function

    at ge.fetchFilms (http://127.0.0.1:35429/appservice/comm/script/fetch.js:8:7)

    at ge.onLoad (http://127.0.0.1:35429/appservice/pages/coming/coming.js:17:21)

    at ge.<anonymous> (WAService.js:1:1401844)

    at ge.p.__callPageLifeTime__ (WAService.js:1:1401589)

    at kt (WAService.js:1:1416539)

    at WAService.js:1:1419553

    at xt (WAService.js:1:1419620)

    at Function.<anonymous> (WAService.js:1:1423760)

    at i.<anonymous> (WAService.js:1:1393108)

    at i.emit (WAService.js:1:463100)

这是一个朋友的源码我导入到我的微信开发工具后一直报这个错。页面效果也一直没有。