Number.toFixed is rounding numbers, but this don't do that. It's just converting float to int.

Number.toFixedNoRounding.js

Number.prototype.toFixedNoRounding = function toFixedNoRounding(n = 0) {
    if (n < 0) n = 0;
    
    const str = this.toString();
    const dot = str.indexOf('.');
    
    if (dot === -1) return this;
    
    return Number(str.slice(0, dot) + n !== 0 ? str.substr(dot, dot + n) : '');
};