Discussion on: Important Javascript functions you have to know to be a better developer

You should not use JSON.stringify to clone object. It leads to problems because it can't strinigfy functions,symbol etc.

JSON.stringify({ 
    fun: () => console.log('lol'), 
    s: Symbol(), 
    u: undefined, 
    n: NaN, 
    in: Infinity
})
'{"n":null,"in":null}'

Just use lodash. Or write your own deep cloning algo. Or when using the browser you can use structuredClone (there are some limits too).