Exploring the world of TypeScript and JSON.stringify functions in JavaScript

In this simplified scenario:

export class LoginComponent{ 
    grant_type: string="password"; 
    jsonPayload: string; 

    Login(username, password){
        this.jsonPayload = JSON.stringify({ username: username, password: password, grant_type: this.grant_type });
 }
}

When using stringify in TypeScript, ensure to properly structure the JSON object like shown above.

Thank you,

Answer №1

stringify has three parameters that it accepts:

  • The item to be converted to a string
  • The function used for replacing values
  • The level of indentation to apply

You have provided a non-function (password) as the second argument.

It seems like you intended to provide one argument - an object for stringify:

this.jsonPayload = JSON.stringify({
    username,
    password, 
    grant_type: this.grant_type
});

Alternatively, if you want to be explicit with all three arguments (especially since the last one requires it):

this.jsonPayload = JSON.stringify({
    username: username,
    password: password, 
    grant_type: this.grant_type
});

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