Adds a convenient prototype function package.

Getting started

Import the package to the first file you call.

import "prototype-helper";

// and use
console.log("10000".toComma()); // 10,000

Prototype Helper

Number

toComma()

It is a function that attaches a three-digit comma.

let test = 123;
test.toComma(); // "123"
test = 123456;
test.toComma(); // "123,456"
//

ampersand()

Ampsand that safely handles floating point errors.

console.log(35 % 0.8); // 0.5999999999999981
console.log((35).ampersand(0.8)); // 0.6

safeAdd()

Addition to safely handling floating point errors.

Calculate only up to 15 decimal places.

console.log(0.1 + 0.2); // 0.30000000000000004
console.log((0.1).safeAdd(0.2)); // 0.3

safeSubtract()

Subtraction that safely handles floating point errors.

Calculate only up to 15 decimal places.

console.log(0.1 - 0.3); // -0.19999999999999998
console.log((0.1).safeSubtract(0.3)); // 0.2

safeDivision()

Division that safely handles floating point errors.

Calculate only up to 15 decimal places.

console.log(0.2 / 0.6); // 0.33333333333333337
console.log((0.2).safeDivision(0.6)); // 0.3333333333333333

safeMultiply()

Division that safely handles floating point errors.

Calculate only up to 15 decimal places.

console.log(0.1 * 0.2); // 0.020000000000000004
console.log((0.1).safeMultiply(0.2)); // 0.02

fixNumber()

Fix the number of digits to be marked.

console.log("30222.50380000".fixPoint(5)); // 30222.50380
console.log((30222).fixPoint(3)); // 30222.000
console.log((30222.12).fixPoint(5).toComma()); // 30,222.12000

fixPoint()

Fix the decimal place to be marked.

console.log("30222.50380000".fixPoint(5)); // 30222.50380
console.log((30222).fixPoint(3)); // 30222.000
console.log((30222.12).fixPoint(5).toComma()); // 30,222.12000

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String

toComma()

It is a function that attaches a three-digit comma.

let test = "123";
test.toComma(); // "123"
test = "123456";
test.toComma(); // "123,456"
//

fixNumber()

Fix the number of digits to be marked.

console.log("30222".fixPoint(5)); // 30222
console.log("30222".fixPoint(5)); // 30222

fixPoint()

Fix the decimal place to be marked.

console.log("30222.50380000".fixPoint(5)); // 30222.50380
console.log((30222).fixPoint(3)); // 30222.000
console.log((30222.12).fixPoint(5).toComma()); // 30,222.12000
console.log("30222.50380000".fixPoint(8).fixNumber(8)); // 00030222.50380000

Object

Array

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Extention Helper

Math

round10(x: number, point?: number)

floor10(x: number, point?: number)

ceil10(x: number, point?: number)

A function that allows you to use decimal points for discarding/rounding/round.

I used the code of the MDN below.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/ceil#decimal_adjustment

console.log(Math.round10(112.5345, 3)); //112.535
console.log(Math.floor10(112.5345, 3)); //112.534
console.log(Math.ceil10(112.5345, 3)); //112.535

randomRange(a: number, b: number, point?: number)

Create random numbers within that range.

(Includes maximum and minimum values.)

console.log(Math.randomRange(112.5, 200, 1)); //135.1
console.log(Math.randomRange(0, 200)); //169

clamp(input: number, min: number, max: number)

console.log(Math.clamp(10, 3, 5)); // 5
console.log(Math.clamp(1, 3, 5)); // 3
console.log(Math.clamp(4, 3, 5)); // 4