@yobta/validator/lib/string/string.js

Tree-shakable es6 validator

import { rule } from '../rule/rule.js';
const coercedTypes = new Set(['boolean', 'number', 'string']);
export const stringMessage = 'It should be a string';
export const string = (message = stringMessage) => rule((value = '') => {
    if (value === '') {
        return undefined;
    }
    if (value instanceof String || coercedTypes.has(typeof value)) {
        return String(value).trim();
    }
    throw new Error(message);
});