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Iterate over an object and remove false property in JavaScript
Suppose, we have a JSON object like this −
const obj = {
a: {
someKey: {
propOne: '',
enabled: true
}
},
b: {
someKey: {
propOne: '',
enabled: false
}
},
c: {
someKey: {
propOne: '',
enabled: false
}
},
someKey: {
ab: {
propOne: '',
enabled: true
}
}
};We are required to write a JavaScript function that takes in one such object and removes all the "enabled" properties recursively from the object in place that have a falsy value.
Example
The code for this will be −
const obj = {
a: {
someKey: {
propOne: '',
enabled: true
}
},
b: {
someKey: {
propOne: '',
enabled: false
}
},
c: {
someKey: {
propOne: '',
enabled: false
}
},
someKey: {
ab: {
propOne: '',
enabled: true
}
}
};
const deleteFalsyKey = obj => {
const keys = Object.keys(obj);
keys.forEach(key => {
if(obj[key].enabled === false){
delete obj[key];
return;
};
if(obj[key] && typeof obj[key] === 'object'){
deleteFalsyKey(obj[key]);
if (!Object.keys(obj[key]).length) {
delete obj[key];
};
}
});
};
deleteFalsyKey(obj);
console.log(obj);Output
The output in the console −
{
a: { someKey: { propOne: '', enabled: true } },
someKey: { ab: { propOne: '', enabled: true } }
}
Updated on: 12-Oct-2020
1K+ Views
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