@vitruvius-labs/ts-predicate/build/esm/type-hint/get-base-type.mjs

TypeScript predicates library

function getBaseType(value) {
    if (typeof value === "function") {
        const CODE = value.toString();
        if (CODE.startsWith("class") || /^function [A-Z]/.test(CODE)) {
            return "class";
        }
        if (/^async function ?\*/.test(CODE) || /^async ?\*/.test(CODE)) {
            return "async generator";
        }
        if (/^function ?\*/.test(CODE) || CODE.startsWith("*")) {
            return "generator";
        }
        if (CODE.startsWith("async")) {
            return "async function";
        }
        return "function";
    }
    if (typeof value === "object") {
        if (value === null) {
            return "null";
        }
        if (Array.isArray(value)) {
            return "array";
        }
        return "object";
    }
    if (Number.isNaN(value)) {
        return "NaN";
    }
    return typeof value;
}
export { getBaseType };