set

The set function sets the value of a property in an object, supporting nested paths (deep set).

Syntax

set(obj, path, value): object

Parameters

Name	Type	Description
obj	object	Target object.
path	string | string[]	Property path (dot or array notation).
value	any	Value to set.

Return

Type	Description
object	Returns the modified object with the value set at the specified path.

Examples

set({}, 'a.b.c', 5); // { a: { b: { c: 5 } } }
set({ x: 1 }, ['y', 'z'], 2); // { x: 1, y: { z: 2 } }
set({ arr: [] }, 'arr[0]', 10); // { arr: [10] }

Notes

• Creates intermediate objects as needed.
• Supports paths with array notation (e.g., 'arr[0].prop').
• Useful for safely updating nested properties.

References

• MDN: Object