Cómo leer Escribir objeto a LocalStorage en JS

var testObject = { 'one': 1, 'two': 2, 'three': 3 };

// Put the object into storage
localStorage.setItem('testObject', JSON.stringify(testObject));

// Retrieve the object from storage
var retrievedObject = JSON.parse(localStorage.getItem('testObject'));

console.log('retrievedObject: ', retrievedObject);
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