normul/lib/schemas/definitions/BooleanSchema.js

Normul is a tiny TypeScript/JavaScript library for data normalization and transformation

import { isBoolean } from '../../utils.js';
import { Schema } from '../Schema.js';
export class BooleanSchema extends Schema {
    _normalize(input, ctx) {
        if (isBoolean(input)) {
            return input;
        }
        this.makeIssue({
            ctx,
            message: 'Converted to boolean',
            level: 'warn',
            expected: 'boolean',
            received: input,
        });
        const string = String(input).trim().toLowerCase();
        if (['false', '0', 'no'].includes(string)) {
            return false;
        }
        if (['true', '1', 'yes'].includes(string)) {
            return true;
        }
        return !!input;
    }
}
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