@ismail424/svelte-formly/utils/validation/rules/required.js

<p align="center"> <img width="100%" height="300" src="./logo.png" alt="Svelte Formly" /> </p>

export function required(val, args) {
    if (val === undefined ||
        val === null ||
        val === "undefined" ||
        val === "null" ||
        val === null ||
        Number.isNaN(val)) {
        return false;
    }
    if (typeof val === "string") {
        const tmp = val.replace(/\s/g, "");
        return tmp.length > 0;
    }
    if (typeof val === "object") {
        return val.length > 0;
    }
    return true;
}