All files / src/internal/client validate.js

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import { untrack } from './runtime.js';
import { get_descriptor, is_array } from './utils.js';
import * as e from './errors.js';
 
/** regex of all html void element names */
const void_element_names =
	/^(?:area|base|br|col|command|embed|hr|img|input|keygen|link|meta|param|source|track|wbr)$/;
 
/** @param {string} tag */
function is_void(tag) {
	return void_element_names.test(tag) || tag.toLowerCase() === '!doctype';
}
 
/**
 * @param {() => any} component_fn
 * @returns {any}
 */
export function validate_dynamic_component(component_fn) {
	try {
		const instance = component_fn();
 
		if (instance !== undefined && typeof instance !== 'object') {
			e.svelte_component_invalid_this_value();
		}
 
		return instance;
	} catch (err) {
		const { message } = /** @type {Error} */ (err);
 
		if (typeof message === 'string' && message.indexOf('is not a function') !== -1) {
			e.svelte_component_invalid_this_value();
		}

		throw err;
	}
}
 
/**
 * @param {() => any} collection
 * @param {(item: any, index: number) => string} key_fn
 * @returns {void}
 */
export function validate_each_keys(collection, key_fn) {
	const keys = new Map();
	const maybe_array = untrack(() => collection());
	const array = is_array(maybe_array)
		? maybe_array
		: maybe_array == null
			? []
			: Array.from(maybe_array);
	const length = array.length;
	for (let i = 0; i < length; i++) {
		const key = key_fn(array[i], i);
		if (keys.has(key)) {
			const a = String(keys.get(key));
			const b = String(i);
 
			/** @type {string | null} */
			let k = String(array[i]);
			if (k.startsWith('[object ')) k = null;
 
			e.each_key_duplicate(a, b, k);
		}
		keys.set(key, i);
	}
}
 
/**
 * @param {Record<string, any>} $$props
 * @param {string[]} bindable
 * @param {string[]} exports
 * @param {Function & { filename: string }} component
 */
export function validate_prop_bindings($$props, bindable, exports, component) {
	for (const key in $$props) {
		var setter = get_descriptor($$props, key)?.set;
		var name = component.name;
 
		if (setter) {
			if (exports.includes(key)) {
				e.bind_invalid_export(component.filename, key, name);
			}
 
			if (!bindable.includes(key)) {
				e.bind_not_bindable(key, component.filename, name);
			}
		}
	}
}