lazy-widgets/dist/xml/validateLayerInit.js

Typescript retained mode GUI for the HTML canvas API

import { Widget } from '../widgets/Widget.js';
/**
 * A validator function which checks whether an input value is a
 * {@link LayerInit}. Doesn't stop the validator chain.
 *
 * @category XML
 */
export function validateLayerInit(value) {
    if (typeof value !== 'object') {
        throw new Error('Invalid LayerInit; not an object');
    }
    if (value === null) {
        throw new Error('Invalid LayerInit; null');
    }
    const li = value;
    if (!(li.child instanceof Widget)) {
        throw new Error('Invalid LayerInit; child is not a Widget');
    }
    if (li.name !== undefined && typeof li.name !== 'string') {
        throw new Error('Invalid LayerInit; name was provided but is not a string');
    }
    if (li.canExpand !== undefined && typeof li.canExpand !== 'boolean') {
        throw new Error('Invalid LayerInit; canExpand was provided but is not a boolean');
    }
    return [li, false];
}
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