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If you’re using a vue cli build project, it’s possible that the config is not set correctly to use typescript.
Add typescript and @vue/cli-plugin-typescript
npm install --save-dev typescript @vue/cli-plugin-typescript
Also add a tsconfig.json
to the root of the project.
Example:
{
"compilerOptions": {
"target": "esnext",
"module": "esnext",
"strict": true,
"jsx": "preserve",
"importHelpers": true,
"moduleResolution": "node",
"experimentalDecorators": true,
"esModuleInterop": true,
"allowSyntheticDefaultImports": true,
"sourceMap": true,
"baseUrl": ".",
"lib": [
"esnext",
"dom",
"dom.iterable",
"scripthost"
]
},
"exclude": [
"node_modules"
]
}
Source:stackexchange.com