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(TypeScript) Property 'msg' has no initializer and is not definitely assigned in the constructor.

See original GitHub issue

Version

3.0.0-alpha.12

Steps to reproduce

vue create hello-world 使用 TypeScript 和使用 class-style 风格组件
cd hello-world
yarn serve or yarn build

What is expected?

Success

What is actually happening?

提示:

Property 'msg' has no initializer and is not definitely assigned in the constructor.

没有修改任何文件，创建默认项目后运行报错。

Issue Analytics

State:
Created 6 years ago
Comments:6 (1 by maintainers)

Top GitHub Comments

28reactions

Darksealcommented, Feb 18, 2018

The issue is most likely related to the strictPropertyInitialization flag introduced in TypeScript 2.7, which is also set to TRUE by default (see official docs).

If you’re using TS 2.7, try to turn it off by adding a "strictPropertyInitialization": false setting to the compilerOptions object within the tsconfig.json root file: if that doesn’t fix it, try to temporarily downgrade to TS 2.6 and see if the error persists.

For a detailed explanation of the issue and some possible workarounds/fixes, read this post.

2reactions

adminparrycommented, Apr 29, 2019

remove “strict”: true,

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