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Editorial Team
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Asked: 2026-05-22T02:03:12+00:00

With the following JSON: var myObj = {name: ‘my obj’, does: ‘nothing’}; var myObjArr

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With the following JSON:

var myObj = {name: 'my obj', does: 'nothing'};
var myObjArr = [myObj, myObj, myObj];

When storing myObjArr to local storage, the myObj JSON is wrtten 3 times, taking up 3 times as much storage space, i.e:

"[{"name":"my obj","does":"nothing"},{"name":"my obj","does":"nothing"},{"name":"my obj","does":"nothing"}]"

Obviously this is going to present scalability issues. Can anyone recommend an optimal solution? So far I’ve had to resort to using ID’s, a la relational databases.

var objects = {0: {name: 'my obj', does: 'nothing'}};
var myObjArr = [{obj: 0}, {obj: 0}, {obj: 0}];

Update – the question is how to represent this hierarchy in local storage when all data is ultimately stored as key/value strings. Resorting to relational database concepts seems old-school.

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1 Answer

  1. Editorial Team

    A more appropriate technology would be IndexedDB used as an object store, however it isn’t supported by many browsers yet.

    EDIT: You’ll want to browse through the documentation of the structured clone algorithm that is used when copying an object into IndexedDB – it looks like references are maintained per record, but adding multiple records will not result in each record referencing objects that were shared in the JavaScript memory space.

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