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December 17, 2018 16:13
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Get deep JavaScript Object keys with dot notation
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| // It may have a lot of possible use case but the one I did it for initially was | |
| // to find which keys were missing between two JSON translations files | |
| function getKeys(obj) { | |
| const keys = []; | |
| const walk = (o, parent = null) => { | |
| for (const k in o) { | |
| const current = parent ? parent + '.' + k : k; | |
| keys.push(current); | |
| // This checks if the current value is an Object | |
| if (Object.prototype.toString.call(o[k]) === '[object Object]') { | |
| walk(o[k], current); | |
| } | |
| } | |
| } | |
| walk(obj); | |
| return keys; | |
| } | |
| /* | |
| Exemple usage: | |
| const obj = { some: { prop: { deeply: { nested: 'value' } }, maybe: 'not' }} | |
| const objKeys = getKeys(obj); | |
| // --> [ 'some', 'some.prop', 'some.prop.deeply', 'some.prop.deeply.nested', 'some.maybe' ] | |
| */ |
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