localStorage.Storage.setItem code example

Example 1: set localstorage

function set(){
    var sendJson = JSON.stringify(arrayName);
    localStorage.setItem('key',sendJson)
}

Example 2: javascript storage get set item

// *** JS Storage Get/Set item *** 

	let target = document.getElementById("target");
    let increment = document.getElementById("increment");
    let count = localStorage.getItem("counter") || 0;
    target.innerHTML = count;

    increment.addEventListener("click", () => {
        count++;
        localStorage.setItem("counter", count);
        target.innerHTML = count;
    })