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How To Set A Default Value Based On User's Previous Value

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I want to have a default value based on what the user put before. For example, if in an input I put '5' I want to see that the value of that input is 5 when I refresh the page, but

Solution 1:

Use local storage:

localStorage = window.localStorage;
localStorage.setItem('inputDefault', '5');

let inputDefault = localStorage.getItem('inputDefault');

Here's a more practical example I quickly whipped up:

<!DOCTYPE html><htmllang="en"><head><metacharset="UTF-8"><title>Local Storage Example</title><scripttype="text/javascript">functionsetLocalStorageValue()
        {
            let myNumberInputField = document.getElementById('myNumberInput');
            let myNewValue = myNumberInputField.value;

            letlocalStorage = window.localStorage;
            localStorage.setItem('defaultValue', myNewValue);
        }

        functiongetLocalStoredValue()
        {
            letlocalStorage = window.localStorage;
            let defaultValue = localStorage.getItem('defaultValue');

            let myNumberInputField = document.getElementById('myNumberInput');
            myNumberInputField.value = defaultValue;
        }
    </script></head><bodyonload="getLocalStoredValue()"><label>My Number Input
    <inputtype="number"id="myNumberInput"value="0"onchange="setLocalStorageValue()"></label></body></html>

Does this answer your question? Note how I am writing back to local storage on the onchange event of the input in question, and I read from local storage when the body of the html loads.

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