Encountering the error: Property 'p' does not exist on type 'string | { p: string; }'. Can someone assist me in resolving this issue?
interface x{
n:string | {p:string}
}
function text(args:x){
const {n:{p}}=args;
console.log(p);
}
Encountering the error: Property 'p' does not exist on type 'string | { p: string; }'. Can someone assist me in resolving this issue?
interface x{
n:string | {p:string}
}
function text(args:x){
const {n:{p}}=args;
console.log(p);
}
Consider a scenario where we have a type defined as type WithP = { p: string }.
The type of variable n is specified as string | WithP. This indicates that the values assigned to the property n can either be of type string or WithP. Since these two sets (types) do not intersect, the values for n cannot belong to both types simultaneously.
While destructuring this variable, the actual type of n may not be known beforehand, meaning the property p might exist or not on n. To ensure that n does indeed contain the property p, it is necessary to perform type narrowing.
interface WithP {
p: string
}
interface x {
n: string | WithP
}
function text(args: x){
const { n: { p }} = args;
console.log(p);
}
function text2(args: x){
const { n } = args;
// implementing type narrowing
if (typeof n === "string") {
// values for `n` are now strings
console.log(n)
} else {
// values for `n` are instances of WithP
const { p } = n;
console.log(p);
}
}
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