@frauschert/ts-guard/lib/guards/isNumber/isNumber.js

ts-guard is a typescript library that provides composable type guards. Its inspired by zod but focusses only on type guards and is more lightweight.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.isNumber = isNumber;
function isNumber(constraints) {
    return (value) => {
        if (typeof value !== "number" || Number.isNaN(value)) {
            return false;
        }
        if (!constraints) {
            return true;
        }
        if (constraints.finite && !Number.isFinite(value)) {
            return false;
        }
        if (constraints.integer && !Number.isInteger(value)) {
            return false;
        }
        if (constraints.positive && value <= 0) {
            return false;
        }
        if (constraints.negative && value >= 0) {
            return false;
        }
        if (constraints.min !== undefined && value < constraints.min) {
            return false;
        }
        if (constraints.max !== undefined && value > constraints.max) {
            return false;
        }
        return true;
    };
}
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