Function devtoolBackCompat

lib/config/normalization.js:627–643

()

	let cached;

	const devtoolBackCompat = () => {
		if (Array.isArray(_devtool)) {
			if (cached) return cached;
			// Prefer `all`, then `javascript`, then `css`
			const match = ["all", "javascript", "css"]
				.map((type) =>
					/** @type {Extract<WebpackOptionsNormalized["devtool"], EXPECTED_ANY[]>} */ (
						_devtool
					).find((item) => item.type === type)
				)
				.find(Boolean);

			// If `devtool: []` is specified, return `false` here
			return (cached = match ? match.use : false);
		}
		return _devtool;
	};

	/** @type {ProxyHandler<WebpackOptionsNormalized>} */
	const handler = Object.create(null);