I am running a query to return some data
async function getIngress(namespace) {
try {
const result = await k8sIngressApi.listNamespacedIngress(namespace, true);
const resultSpec = result.body.items[0].spec;
return resultSpec;
} catch (e) {
throw new Error(e);
}
}
How do I check if resultSpec is undefined and if so throw and error and stop executing?
I have tried
return resultSpec || throw new Error() however get syntax errors when I try that.
Just use an if statement:
async function getIngress(namespace) {
try {
const result = await k8sIngressApi.listNamespacedIngress(namespace, true);
const resultSpec = result.body.items[0].spec;
if (!resultSpec) throw new TypeError('Spec is undefined');
return resultSpec;
} catch (e) {
throw new Error(e);
}
}
As mentioned by others, if you don't plan on doing any error handling in your catch block other than to simply rethrow the error, the try/catch is not necessary here, as you can just let whichever function that calls getIngress handle it
try...catch just to rethrow the error.
undefined property accesses so I just left that part of it untouchedYou don't need the try and catch statement if you're not handling errors in that function.
if (resultSpec == undefined) throw Error("The result is undefined")
if(!resultSpec) throw new Error()?throwis a statement, not an expression.return resultSpec || new Error();if you actually want to return an error like your title says, but your question body says you want to throw the error and stop executing, so you just need to determine if the variable is undefined (which can be answered by the linked question's answers) and throw an error.