Is it not allowed to use the '<>' type assertion, you should use 'as' instead?

Below is a test scenario present in my spec file,

it (should create,()=>{
     const url  = (<jasmine.spy> http.get).calls.args(0)[0]
     expect(url).toBe('/api/get')
});  

Upon execution, I encounter the following linting issue.

Type assertion using the '<>' is forbidden, use as instead?

If anyone has any suggestions or solutions, please feel free to share. Thank you!

Answer №1

Referenced from Type Assertion.

Understanding Type assertions

as foo compared to <foo>

In the past, the syntax used for type assertion was <foo>. An example is shown below:

var foo: any;
var bar = <string> foo; // bar is now of type "string"

However, there arose an issue in the language grammar when using <foo> style assertions in JSX:

var foo = <string>bar;
</string>

As a result, it is now suggested to stick with using as foo for consistency.

Hence, the linter will alert about usage of the old syntax.

In this scenario, the code snippet showcases the updated syntax:

const url  = (http.get as jasmine.spy).calls.args(0)[0]

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