jeena/en.javascript.info
1
0
Fork 0
Code Issues Pull requests Projects Packages Wiki Activity Actions

Merge pull request #2168 from vsemozhetbyt/patch-3

Browse source 
Fix syntax enumeration in 1.4.7
This commit is contained in:
Alexey Pyltsyn 2020-10-05 23:32:23 +03:00 • committed by GitHub
commit ae06ca62bb
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 1 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

2
1-js/04-object-basics/07-optional-chaining/article.md
View file

@ -164,7 +164,7 @@ The `?.` syntax has three forms:
1. `obj?.prop` -- returns `obj.prop` if `obj` exists, otherwise `undefined`. 1. `obj?.prop` -- returns `obj.prop` if `obj` exists, otherwise `undefined`.
2. `obj?.[prop]` -- returns `obj[prop]` if `obj` exists, otherwise `undefined`. 2. `obj?.[prop]` -- returns `obj[prop]` if `obj` exists, otherwise `undefined`.
3. `obj?.method()` -- calls `obj.method()` if `obj` exists, otherwise returns `undefined`. 3. `obj.method?.()` -- calls `obj.method()` if `obj.method` exists, otherwise returns `undefined`.
As we can see, all of them are straightforward and simple to use. The `?.` checks the left part for `null/undefined` and allows the evaluation to proceed if it's not so. As we can see, all of them are straightforward and simple to use. The `?.` checks the left part for `null/undefined` and allows the evaluation to proceed if it's not so.