scancss/dist/predicates/isValidFramesFunctionArgs/index.js

A robust CSS stylesheet statistics collector and analyzer

'use strict';

Object.defineProperty(exports, "__esModule", {
	value: true
});
exports.isValidFramesFunctionArgs = isValidFramesFunctionArgs;

var _reIntegerString = require('../../constants/reIntegerString');

/**
 * https://developer.mozilla.org/en-US/docs/Web/CSS/single-transition-timing-function#Examples_3
 *
 * 1) The parameter must be an <integer> and cannot be a real value, even if it is equal to one.
 * 2) The amount of frames must be non-negative.
 * 3) There must be at least two frames.
 */

function isValidFramesFunctionArgs(func) {
	const arg = func.slice(7, -1);

	if (_reIntegerString.reIntegerString.test(arg) && Number(arg) >= 2) {
		return true;
	}

	return false;
}