Get Child Property using Reflect ES6

Question

Was hoping to check for existence of a full path like objecta.objectb.objectc in a JSON file. First idea had been to JSON parse to an object then use reflection check if property existed but when I try it as below it won't allow me to access a child in the property key?

What am I missing?

const object1 = {
  property1: 42,
  property2 : {
        property2a: "abc"
    },
};

console.log(Reflect.has(object1, 'property1'));
// expected output: true

console.log(Reflect.has(object1, 'property2.property2a'));
// expected output: true but is false
console.log(object1.property2.property2a);
// prints value as expected
console.log(Reflect.has(object1, 'property3.property2a'));
// expected output: false
console.log(Reflect.has(object1, 'toString'));
// expected output: true

`Reflect.has` doesn't support nesting this way. It only checks immediate properties. — georg, Jun 12 '19 at 14:00

Kobe · Accepted Answer · 2019-06-12T14:13:23.927

2

You shouldn't use Reflect here. Rather, you should use multiple conditional statements to check if it exists, else return false:

const object1 = {
  property1: 42,
  property2 : {
        property2a: "abc"
    },
};

console.log(object1 && object1.property2 && object1.property2.property2a ? true : false)
console.log(object1 && object1.property2 && object1.property2.property2b ? true : false)

edited Jun 12 '19 at 14:13

answered Jun 12 '19 at 14:01

Kobe

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Get Child Property using Reflect ES6

1 Answers1