Function parse

base.js:369–452

(query, options)

}

export function parse(query, options) {
	options = {
		decode: true,
		sort: true,
		arrayFormat: 'none',
		arrayFormatSeparator: ',',
		parseNumbers: false,
		parseBooleans: false,
		types: Object.create(null),
		...options,
	};

	validateArrayFormatSeparator(options.arrayFormatSeparator);

	const formatter = parserForArrayFormat(options);

	// Create an object with no prototype
	const returnValue = Object.create(null);

	if (typeof query !== 'string') {
		return returnValue;
	}

	query = query.trim().replace(/^[?#&]/, '');

	if (!query) {
		return returnValue;
	}

	// Avoid `split('&')` so separator-heavy inputs don't allocate large arrays of empty strings.
	let parameterStart = 0;

	for (let index = 0; index <= query.length; index++) {
		if (index < query.length && query[index] !== '&') {
			continue;
		}

		if (index === parameterStart) {
			parameterStart = index + 1;
			continue;
		}

		const parameter = query.slice(parameterStart, index);
		parameterStart = index + 1;
		const parameter_ = options.decode ? parameter.replaceAll('+', ' ') : parameter;

		let [key, value] = splitOnFirst(parameter_, '=');

		if (key === undefined) {
			key = parameter_;
		}

		// Missing `=` should be `null`:
		// http://w3.org/TR/2012/WD-url-20120524/#collect-url-parameters
		value = value === undefined ? null : (['comma', 'separator', 'bracket-separator'].includes(options.arrayFormat) ? value : decode(value, options));
		formatter(decode(key, options), value, returnValue);
	}