PNG  IHDR;IDATxܻn0K )(pA 7LeG{ §㻢|ذaÆ 6lذaÆ 6lذaÆ 6lom$^yذag5bÆ 6lذaÆ 6lذa{ 6lذaÆ `}HFkm,mӪôô! x|'ܢ˟;E:9&ᶒ}{v]n&6 h_tڠ͵-ҫZ;Z$.Pkž)!o>}leQfJTu іچ\X=8Rن4`Vwl>nG^is"ms$ui?wbs[m6K4O.4%/bC%t Mז -lG6mrz2s%9s@-k9=)kB5\+͂Zsٲ Rn~GRC wIcIn7jJhۛNCS|j08yiHKֶۛkɈ+;SzL/F*\Ԕ#"5m2[S=gnaPeғL lذaÆ 6l^ḵaÆ 6lذaÆ 6lذa; _ذaÆ 6lذaÆ 6lذaÆ RIENDB` "use strict"; // Following http://www.w3.org/TR/css3-selectors/#nth-child-pseudo Object.defineProperty(exports, "__esModule", { value: true }); exports.parse = void 0; // [ ['-'|'+']? INTEGER? {N} [ S* ['-'|'+'] S* INTEGER ]? var RE_NTH_ELEMENT = /^([+-]?\d*n)?\s*(?:([+-]?)\s*(\d+))?$/; /** * Parses an expression. * * @throws An `Error` if parsing fails. * @returns An array containing the integer step size and the integer offset of the nth rule. * @example nthCheck.parse("2n+3"); // returns [2, 3] */ function parse(formula) { formula = formula.trim().toLowerCase(); if (formula === "even") { return [2, 0]; } else if (formula === "odd") { return [2, 1]; } var parsed = formula.match(RE_NTH_ELEMENT); if (!parsed) { throw new Error("n-th rule couldn't be parsed ('" + formula + "')"); } var a; if (parsed[1]) { a = parseInt(parsed[1], 10); if (isNaN(a)) { a = parsed[1].startsWith("-") ? -1 : 1; } } else a = 0; var b = (parsed[2] === "-" ? -1 : 1) * (parsed[3] ? parseInt(parsed[3], 10) : 0); return [a, b]; } exports.parse = parse;