.push

This method can be used two similar ways based on context:

🔹 𝙉𝙀𝙒 𝙆𝙀𝙔
localDataStorage.push( arrayKeyName, value1 [, value2 ...] )

This method stores value(s) under arrayKeyName, creating a new key if necessary, where the key prefix is prepended to arrayKeyName. As a shortcut for set, this automatically creates a new Array Key.

🔹 𝙀𝙓𝙄𝙎𝙏𝙄𝙉𝙂 𝙆𝙀𝙔
localDataStorage.push( arrayKeyName, value [, index] )

This is also used to place value onto an existing arrayKeyName, optionally at the index position, as a non-destructive insert. When index is omitted, the element is appended to the Array Key by default. When specified, the index is automatically corrected to prevent sparse arrays.

EXAMPLES:

Create and initialize a new Array Key by supplying discrete values:
● localData.push( 'nicknames', 'Mac', 'Will', 'Bill', 'Tom' ); --> ['Mac', 'Will', 'Bill', 'Tom']

Alternatively, create and initialize a new Array Key by supplying a single array value:
● localData.push( 'nicknames', ['Mac', 'Will', 'Bill', 'Tom'] );

Push a value onto an existing Array Key:
● localData.push( 'nicknames', 'Todd' ); --> ['Mac', 'Will', 'Bill', 'Tom', 'Todd']

Insert a value into the second position:
● localData.push( 'nicknames', 'Kay', 2 ); --> ['Mac', 'Kay', 'Will', 'Bill', 'Tom', 'Todd']

The value of the updated arrayKeyName is returned when this method executes.

When data must be added and deleted at the same time, use poke.

🌐 This method may fire an event allowing you to monitor the key change.

✨ The complement to this is pull.

📝 NOTE: This method is specific to Array Keys and will fail if used on any other key type. Multiple values can be set only when making a new key. Inserting values onto an existing key must be done one at a time. Array Keys use one-based array indices.