Js Objects — Free Javascript Tutorial
Learn Js Objects in Javascript with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
TL;DR: Learn Js Objects in Javascript with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
Js Objects in Javascript
Objects store key-value pairs. Keys are strings (or Symbols), values can be any type including functions (then called methods).
Access: `obj.key` (dot notation) or `obj["key"]` (bracket notation — useful with dynamic keys).
Adding/updating: `obj.newKey = value`. Deleting: `delete obj.key`.
`Object.keys(obj)` — array of keys. `Object.values(obj)` — array of values. `Object.entries(obj)` — array of [key,value] pairs.
Spread to copy/merge: `const copy = {...original}`. `const merged = {...obj1, ...obj2}`.
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