webpack/lib/util/traverseDestructuringAssignmentProperties.js

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/

"use strict";

/** @typedef {import("../javascript/JavascriptParser").DestructuringAssignmentProperties} DestructuringAssignmentProperties */
/** @typedef {import("../javascript/JavascriptParser").DestructuringAssignmentProperty} DestructuringAssignmentProperty */

/**
 * Deep first traverse the properties of a destructuring assignment.
 * @param {DestructuringAssignmentProperties} properties destructuring assignment properties
 * @param {((stack: DestructuringAssignmentProperty[]) => void) | undefined=} onLeftNode on left node callback
 * @param {((stack: DestructuringAssignmentProperty[]) => void) | undefined=} enterNode enter node callback
 * @param {((stack: DestructuringAssignmentProperty[]) => void) | undefined=} exitNode exit node callback
 * @param {DestructuringAssignmentProperty[] | undefined=} stack stack of the walking nodes
 */
function traverseDestructuringAssignmentProperties(
	properties,
	onLeftNode,
	enterNode,
	exitNode,
	stack = []
) {
	for (const property of properties) {
		stack.push(property);
		if (enterNode) enterNode(stack);
		if (property.pattern) {
			traverseDestructuringAssignmentProperties(
				property.pattern,
				onLeftNode,
				enterNode,
				exitNode,
				stack
			);
		} else if (onLeftNode) {
			onLeftNode(stack);
		}
		if (exitNode) exitNode(stack);
		stack.pop();
	}
}

module.exports = traverseDestructuringAssignmentProperties;