Why is the typings.json necessary in the following format:
{
"globalDependencies": {
"core-js": "registry:dt/core-js#0.0.0+20160725163759",
"jasmine": "registry:dt/jasmine#2.2.0+20160621224255",
"node": "registry:dt/node#6.0.0+20160831021119"
}
}
for an Angular2 project? I have come across:
typings.json includes extra definition files for libraries that are not recognized by the TypeScript compiler by default.
as a beginner, this concept is still unclear to me.
After some investigation, I came across the following information:
It appears that JavaScript libraries like jQuery, Jasmine testing library, and Angular add new features and syntax to the JavaScript environment that TypeScript may not recognize by default. When TypeScript encounters something it doesn't understand, it will generate an error.
If you create a library that others may use in their projects with TypeScript, there is a high chance of encountering errors. To address this issue, it is recommended to write TypeScript type definition files (.d.ts files) within the library directory.
Mainstream libraries like AngularJS already include these .d.ts files. However, certain libraries such as "core-js" and "jasmine" do not provide them in their npm packages. Fortunately, additional .d.ts files have been created by either the original authors or community members and made available in well-known places for download using typings tool.
In order to ensure smooth project execution, it is essential to create a typings.json file to access the necessary type definition files.
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