Attempting to simplify repetitive actions by utilizing commands.ts, such as requesting email and password.
However, upon trying to implement this, I encounter an error for the login (Argument of type '"login"' is not assignable to parameter of type 'keyof Chainable).
`
Cypress.Commands.add("login", (email, password) => {
some codes....
})
`
Haven't explored any other options yet.
BRAND NEW ANSWER
To enhance the functionality of Cypress, create a file named global.d.ts and include the following code:
namespace Cypress {
interface Chainable {
login(email:string, password:string): Chainable<void>;
}
}
PREVIOUS SOLUTION
To achieve the same outcome, you can create an index.ts file at the same level as commands.ts with the following content:
export {}
declare global {
namespace Cypress {
interface Chainable {
login(email:string, password:string): Chainable<void>;
}
}
}
Enjoy the benefits of the updated code
EXPLANATION - WHY IT WORKS
When working with Typescript, interfaces play a crucial role in defining the structure of objects and their properties. By extending the existing 'Cypress.Chainable' interface with the 'login' property, you are effectively adding new functionality to Cypress.
Let me illustrate this concept with a different example
interface String {
myOwnChainableFunction: Function
}
String.prototype.myOwnChainableFunction = function (this: string){
console.log(this)
}
'hello'.myOwnChainableFunction();
In this scenario, we are expanding the capabilities of the String object by introducing a custom method that can be chained. While in Javascript this is achieved by modifying the prototype directly, in Typescript, it requires updating the corresponding interface for type checking purposes.
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