How can I store input into an array permanently after my code ends? [duplicate]

Answer 1

Code that runs in JavaScript it not persistent. Once the program is finished, all values in memory are discarded. You need to save the value to disk or store it in a database using a server-side language.

You can export the array with:

var savedFile_JsonStringData = JSON.stringify(nameData);

and store its string contents in a file or database.

Then, to import the data, load the saved file and convert its string representation back into an array:

var nameData = JSON.parse(savedFile_JsonStringData);

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Local Storage

As others have noted, a temporary storage method may work if you don't need the data to hang around for too long.

Window.sessionStorage offers the following:

The sessionStorage property allows you to access a session Storage object. sessionStorage is similar to localStorage, the only difference is while data stored in localStorage has no expiration set, data stored in sessionStorage gets cleared when the page session ends. A page session lasts for as long as the browser is open and survives over page reloads and restores. Opening a page in a new tab or window will cause a new session to be initiated.

Minimum browser version support

Feature        | Chrome | Firefox | IE | Opera | Safari
---------------+--------+---------+----+-------+-------
localStorage   | 4      | 3.5     | 8  | 10.50 | 4
sessionStorage | 5      | 2       | 8  | 10.50 | 4

Example

// Save data to sessionStorage
sessionStorage.setItem('myKey', JSON.stringify(nameData));

// Get saved data from sessionStorage
var nameData = JSON.parse(sessionStorage.getItem('myKey'));

Answer 2

Just a guess, but it sounds like you're making some kind of app or tool for yourself, and you'd like to keep a persistent state. For this, you can use the Web Storage API.

window.localStorage.setItem('names', JSON.stringify(nameData));
nameData = JSON.parse(window.localStorage.getItem('names'));

Answer 3

You can use something called session storage .

sessionStorage.setItem("key", JSON.stringify(myArray));
//and to retrieve 
myArray = JSON.parse(sessionStorage.getItem("key"));