Uncaught TypeError: Cannot assign to read only property

Question

I was trying out this really simple example from the awesome \"Professional JavaScript for Web Developers\" book by Nicholas Zakas but I can\'t figure what I am doing wrong

Answer 1

If sometimes a link! will not work. so create a temporary object and take all values from the writable object then change the value and assign it to the writable object. it should perfectly.

var globalObject = {
    name:"a",
    age:20
}
function() {
    let localObject = {
    name:'a',
    age:21
    }
    this.globalObject = localObject;
}