Kozz•3y ago

✅ – bfrisco – 14-14 Dec 18

Is there any shorthand way to do this?

const obj = {};
obj['a']['b']['c'] = 'a'
// Cannot read properties of undefined (reading 'b')

const obj = {};
obj['a']['b']['c'] = 'a'
// Cannot read properties of undefined (reading 'b')

Current solution:

const obj = {}
obj['a'] = {}
obj['a']['b'] = {};
obj['a']['b']['c'] = 'a';

const obj = {}
obj['a'] = {}
obj['a']['b'] = {};
obj['a']['b']['c'] = 'a';

5 Replies

EvokeMe•3y ago

const obj = {a: {b: {c: `a`}}}

const obj = {a: {b: {c: `a`}}}

@bfrisco ^^

KozzOP•3y ago

ah, thanks. i'd still want to preserve any other values, but can use optional chaining with destructuring i believe

EvokeMe•3y ago

Also u can use dynamic keys, like this:

const key = `b`
const obj = {a: {[key]: {c: `a`}}}

const key = `b`
const obj = {a: {[key]: {c: `a`}}}

@bfrisco ^^

KozzOP•3y ago

yeah, my actual code is like this now:

stats = {
                  ...stats,
                  [deviceType]: {
                    ...stats?.[deviceType],
                    // etc
                  }
                }

stats = {
                  ...stats,
                  [deviceType]: {
                    ...stats?.[deviceType],
                    // etc
                  }
                }

I think this will work, TY

reactibot•3y ago

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