How can I filter a JSON object in JavaScript?
Beside the given solutions, you could use a recursive style to check the keys.
This proposal gives the opportunity to have more nested objects inside and get only the filtered parts.
function filterBy(val) {
function iter(o, r) {
return Object.keys(o).reduce(function (b, k) {
var temp = {};
if (k.toLowerCase().indexOf(val.toLowerCase()) !== -1) {
r[k] = o[k];
return true;
}
if (o[k] !== null && typeof o[k] === 'object' && iter(o[k], temp)) {
r[k] = temp;
return true;
}
return b;
}, false);
}
var result = {};
iter(obj, result);
return result;
}
var obj = { Alarm: { Hello: 48, "World": 3, Orange: 1 }, Rapid: { Total: 746084, Fake: 20970, Cancel: 9985, Word: 2343 }, Flow: { Support: 746084, About: 0, Learn: 0 }, test: { test1: { test2: { world: 42 } } } };
console.log(filterBy('ange'));
console.log(filterBy('flo'));
console.log(filterBy('wor'));.as-console-wrapper { max-height: 100% !important; top: 0; }You can create a function using reduce() and Object.keys() that will check key names with indexOf() and return the desired result.
var obj = {
"Alarm": {
"Hello": 48,
"World": 3,
"Orange": 1
},
"Rapid": {
"Total": 746084,
"Fake": 20970,
"Cancel": 9985,
"Word": 2343
},
"Flow": {
"Support": 746084,
"About": 0,
"Learn": 0
}
}
function filterBy(val) {
var result = Object.keys(obj).reduce(function(r, e) {
if (e.toLowerCase().indexOf(val) != -1) {
r[e] = obj[e];
} else {
Object.keys(obj[e]).forEach(function(k) {
if (k.toLowerCase().indexOf(val) != -1) {
var object = {}
object[k] = obj[e][k];
r[e] = object;
}
})
}
return r;
}, {})
return result;
}
console.log(filterBy('ange'))
console.log(filterBy('flo'))
console.log(filterBy('wor'))With the filter method I think you mean the Array#filter function. This doesn't work for objects.
Anyway, a solution for your input data could look like this:
function filterObjects(objects, filter) {
filter = filter.toLowerCase();
var filtered = {};
var keys = Object.keys(objects);
for (var i = 0; i < keys.length; i++) {
var key = keys[i];
if (objects.hasOwnProperty(key) === true) {
var object = objects[key];
var objectAsString = JSON.stringify(object).toLowerCase();
if (key.toLowerCase().indexOf(filter) > -1 || objectAsString.indexOf(filter) > -1) {
filtered[key] = object;
}
}
}
return filtered;
}