Function spreadNode

packages/babel-plugin-htm/index.mjs:124–156

(args, state)

	}

	function spreadNode(args, state) {
		if (args.length === 0) {
			return t.nullLiteral();
		}
		if (args.length > 0 && t.isNode(args[0])) {
			args.unshift({});
		}

		// 'Object.assign(x)', can be collapsed to 'x'.
		if (args.length === 1) {
			return propsNode(args[0]);
		}
		// 'Object.assign({}, x)', can be collapsed to 'x'.
		if (args.length === 2 && !t.isNode(args[0]) && Object.keys(args[0]).length === 0) {
			return propsNode(args[1]);
		}

		if (useNativeSpread) {
			const properties = [];
			args.forEach(arg => {
				if (t.isNode(arg)) {
					properties.push(t.spreadElement(arg));
				}
				else {
					properties.push(...objectProperties(arg));
				}
			});
			return t.objectExpression(properties);
		}

		const helper = useBuiltIns ? dottedIdentifier('Object.assign') : state.addHelper('extends');
		return t.callExpression(helper, args.map(propsNode));
	}

	function propsNode(props) {
		return t.isNode(props) ? props : t.objectExpression(objectProperties(props));