Why i have to get item from local storage before even storing it?-CodePudding

Why in this code I am getting an item from local storage first even before storing it

let addnote = document.getElementById("addbtn");
addnote.addEventListener("click", saveNote );
let message = document.getElementById("notes2");
function saveNote() {
    let TXT = document.getElementById("addtxt");
    let note = localStorage.getItem("notes");
    console.log("save");
    if(note == 0){
        noteData2 = [];
    }
    else{
        noteData2 = JSON.parse(note);
    }
    noteData.push(TXT.value);
    localStorage.setItem("notes", JSON.stringify(noteData));
    TXT.value = "";
};

Thanks

CodePudding user response：

If you don't, then the second time you called saveNote you would overwrite the previous note instead of storing an array with two notes in it.

CodePudding user response：

try this:

let addnote = document.getElementById("addbtn");
addnote.addEventListener("click", saveNote );
let message = document.getElementById("notes2");
function saveNote() {
    let TXT = document.getElementById("addtxt");
    let note = localStorage.getItem("notes");
    console.log("save");
    if(!note){
        noteData2 = [];
    }
    else{
        noteData2 = JSON.parse(note);
    }
    noteData.push(TXT.value);
    localStorage.setItem("notes", JSON.stringify(noteData));
    TXT.value = "";
};