Method push

lib/css/CssParser.js:1828–1830

Push the current scope; call before descending into a `Function` body.

()

			stack: [],
			/** Push the current scope; call before descending into a `Function` body. */
			push() {
				this.stack.push((this.active ? 1 : 0) | (this.emit ? 2 : 0));
			},
			/** Pop the saved scope; call when leaving a `Function` body. */
			pop() {
				const s = /** @type {number} */ (this.stack.pop());