Error Invalid Shorthand Property Initializer In Javascript

Why I got error Invalid shorthand property initializer when running on my Chrome browser?

Solution 1:

You do not use '=' inside object literals. It should be raichu : {

letsamson_pokemon= {
    raichu : {
        species:'Rare pokemon',
        height:0.8,
        weight:12
    }
}

Solution 2:

you can do this.

let weight4 = (typeof samson_pokemon !== 'undefined') ? samson_pokemon.pikachu : samson_pokemon.weight;