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Viewshow can I prevent errors with nested data in an array if it is empty?
I have this example:
var data={
city:{
street:{
houses:[]
}
}
}
alert(data.city.street.houses?.[0].person);
var data={
city:{
street:{
houses:[]
}
}
}
alert(data.city.street.houses?.[0].person);this would show an error because it does not exist houses[0], how can I avoid having errors but in case houses[0] does exist, continue with the nesting?
doing this, I am getting errors:
how can I do it?
·
Juan Pablo Isaza
1 answers
Answer question0
Just add another chaining operator after the array item reference:
var data = {
city: {
street: {
houses: []
}
}
}
let res = data.city.street.houses?.[0];
res = res != undefined ? res.person : 'no value';
console.log(res);
·
Juan Pablo Isaza
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