ecmascript 6 - why javascript const keyword is not working in array?

Question

function home() {
  const list = ['john', 'adele', 'hary']; list.push('tiger');
  return list;
}
home() //["john", "adele", "hary", "tiger"]

push method is available and also, list[0] = "abc" is available

In JS, const keyword is different to Java or CPP??

Answer 1

With a const declaration, you can't reassign the variable but you can mutate it, which is what happens with the Array.prototype.push method.

You won't be able to do like

function home() {
  const list = ['john', 'adele', 'hary']; 
  list = list.concat(['tiger']); // this is reassignment and hence will fail
  return list;
}
home()