i have develop a todo app. where user insert some values and it gets save on the screen. now i want to save the values into localstorage.but its not getting saved instead i am getting a empty {}.
here is the javascript code
//crete element from input box and delete
let knoo = document.getElementById('kno')
let box= document.getElementById('txt')
let sub= document.getElementById('sub').addEventListener('click',()=>{
let para = document.createElement('ul')
para.innerText= box.value
knoo.appendChild(para)
box.value=''
localStorage.setItem('key', JSON.stringify(para))
//styling
para.addEventListener('click', ()=>{
para.style.textDecoration = 'line-through'
})
//delete
para.addEventListener('dblclick', ()=>{
knoo.removeChild(para)
})
})
here is the html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<h2>hi</h2>
<div id="hello">
<h1>hello</h1>
</div>
<button id="btn">delete</button> <br>
<br>
<input type="text" id="txt">
<button type="submit" id="sub">+</button>
<div id="kno"></div>
<script src="main.js"></script>
</body>
</html>
That is because you use JSON.stringify with a html element which will not work and it will always produce {}.
The JSON.stringify() method converts a JavaScript object or value to a JSON string
I solution is to use array to store the value for para and use JSON.stringify for the array
let knoo = document.getElementById('kno')
let box= document.getElementById('txt')
let storedvalue = []
if(localStorage.getItem('key')){
storedvalue = localStorage.getItem('key');
}
let sub= document.getElementById('sub').addEventListener('click',()=>{
let para = document.createElement('ul')
para.innerText= box.value
knoo.appendChild(para)
box.value=''
storedvalue.push(para.innerText)
localStorage.setItem('key', JSON.stringify(storedvalue))
//styling
para.addEventListener('click', ()=>{
para.style.textDecoration = 'line-through'
})
//delete
para.addEventListener('dblclick', ()=>{
knoo.removeChild(para)
})
})<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<h2>hi</h2>
<div id="hello">
<h1>hello</h1>
</div>
<button id="btn">delete</button> <br>
<br>
<input type="text" id="txt">
<button type="submit" id="sub">+</button>
<div id="kno"></div>
<script src="main.js"></script>
</body>
</html>