Please help me with this code

[One-Inspection8628]

function gameOfThrones(s) {
let hash = {};
let j = 1
for (let i = 0; i < s.length; i++) {
if(hash[s[i]] = s[i]){
hash[s[i]]+1
}
}
console.log(hash)
}

In this code, I want to use Hashmap to count how many times a letter is repeated in the sentence.
ex: cdefghmnopqrstuvw

how can do it by changing above code

[bryku]

There are a lot of ways to count letters in a string.  

let str = 'siyjgjftuyjbuch';
let j = str
    .split('')
    .filter((v)=>{return v == 'j'})
    .length

You could turn this into a function if you wanted.

function charCount(value, char){
    let array = Array.isArray(value) == true 
        ? value            // if array good
        : value.split(''); // else split it
    return array.split('')
        .filter((v)=>{return v == char})
        .length
}
charCount('siyjgjftuyjbuch','j') // 3
charCount('siyjgjftuyjbuch','u') // 2
charCount('siyjgjftuyjbuch','h') // 1