TypeError: Cannot read properties of undefined (reading 'length')

[Dengju Deng]

貌似更新了新版的 @vue/composition-api 后报错了，求助大佬 ... @antfu

@vue/composition-api: "^1.7.0"
vue: "^2.6.14",

[Anthony Fu]

v1.7.0 changed nothing about the version range of Vue. https://github.com/vuejs/composition-api/commits/main

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We temporarily close this due to the lack of enough information.
Please provide a minimal reproduction to reopen the issue.
Thanks.

Why reproduction is required

[Sponge]

Suffer from it too.
Have a check on Vue version. Vue has just published v2.7 with built-in composition api support.

vue: "~2.6.14",

Limit Vue version to 2.6.x resolves my issue.