Both, keys and values stored in window.localStorage
, are stored as strings (more precisely, in UTF-16 DOMString format). All non-string values are converted into a string (as you can see in the following examples):
localStorage.setItem('foo', 123); const value = localStorage.getItem('foo'); console.log(value); // '123' console.log(typeof value); // 'string' console.log(value === '123'); // true
localStorage.setItem('foo', true); const value = localStorage.getItem('foo'); console.log(value); // 'true' console.log(typeof value); // 'string' console.log(value === 'true'); // true
localStorage.setItem('foo', null); const value = localStorage.getItem('foo'); console.log(value); // 'null' console.log(typeof value); // 'string' console.log(value === 'null'); // true
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