Below is the code I've been working on.
function DD(x: { y: string } | {}) {
if (x.y) {//error
console.log("DD jingo");
}
}
An error is displayed stating "The property "y" does not exist in the type "{} | {y: string;}". The property "y" does not exist in the type "{}".
I am still learning TypeScript. Can someone guide me on how to specify that X should be able to accept both an empty object and {y: string}?
To make the y property optional, you can add a question mark ?:
function DD(x: { y?: string }) {
if (x.y) {
console.log("DD jingo");
}
}
Uncertain if this approach is considered best practice in TypeScript, but one possible solution is to explicitly specify to TypeScript that the value of x should be of type { y: string } within the if statement:
function DD(x: { y: string } | {}) {
if ((x as {y: string}).y) {
console.log("DD jingo");
}
}
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