@ismail424/svelte-formly/utils/validation/index.js

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

import * as CoreRules from './rules/index';
const _coreRules = CoreRules;
/**
 * Validate field by rule.
 * @param {configs field} field
 */
export async function validate(_field) {
    let { value, rules } = _field;
    let valid = true;
    let rule;
    let errors = [];
    let validation;
    if (rules) {
        await Promise.all(rules.map(async (validator) => {
            // For file type.
            if (validator === 'file') {
                if (value) {
                    Object.keys(value).map((i) => {
                        if (_field.file) {
                            Object.entries(_field.file).map(([key, val]) => {
                                valid = _coreRules[key].call(null, value[i], val);
                                if (!valid) {
                                    errors = [...errors, key];
                                }
                            });
                        }
                    });
                }
            }
            else {
                // For custom rule.
                if (typeof validator === 'function') {
                    valid = await validator.call;
                    rule = validator.name;
                }
                else if (typeof validator === 'object') {
                    valid = await validator.fnc();
                    rule = validator.name;
                }
                else {
                    const args = validator.split(/:/g);
                    rule = args.shift();
                    valid = _coreRules[rule].call(null, value, args);
                }
                if (!valid) {
                    errors = [...errors, rule];
                }
            }
        }));
        validation = { errors, dirty: errors.length > 0 };
    }
    else {
        validation = { errors, dirty: false };
    }
    _field.validation = validation;
    return _field;
}