not working on ios9 safari

[rockcookies]

Hello,

I found a critical bug with composition-api on iOS 9 Safari. The problem is that the page can't be loaded but setup function is invoked.

Any help is appreciated, I spent some time on debuging this and it's only happening on iOS 9 devices. On iOS 8 devices it's working, but the loading is extremely long.

[liximomo]

Can you provide more information? Any logs in the safari console? A minimal example is also required.

[rockcookies]

here: https://github.com/Rockcookies/vue-composition-api-ios9

my code:

in my android 4.4:

in my ios 9.3.4:

[F-happy]

@rockcookies you need Reflect polyfill

[zhiquan-yu]

@rockcookies
Add import 'core-js/features/reflect/own-keys' in your index.js, because composition-api uses Reflect which not work on iOS 9

[HcySunYang]

The problem is caused here: https://github.com/vuejs/composition-api/blob/master/src/utils.ts#L5

In IOS 9, we should check hasSymbol with:

export const hasSymbol =
    typeof Symbol !== 'undefined' && isNative(Symbol) &&
    typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);

This code is copied from vue.

[zhiquan-yu]

@liximomo please publish a patch version