: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
* @param {string} str string to split
* @param {int} index index to split string at
* @returns {[string,string]}
* @throws InvalidArgumentError
showdown.helper.splitAtIndex = function (str, index) {
if (!showdown.helper.isString(str)) {
throw 'InvalidArgumentError: first parameter of showdown.helper.regexIndexOf function must be a string';
return [str.substring(0, index), str.substring(index)];
* Obfuscate an e-mail address through the use of Character Entities,
* transforming ASCII characters into their equivalent decimal or hex entities.
* Since it has a random component, subsequent calls to this function produce different results
showdown.helper.encodeEmailAddress = function (mail) {
return '&#' + ch.charCodeAt(0) + ';';
return '&#x' + ch.charCodeAt(0).toString(16) + ';';
mail = mail.replace(/./g, function (ch) {
// this *must* be encoded. I insist.
ch = encode[Math.floor(Math.random() * 2)](ch);
// roughly 10% raw, 45% hex, 45% dec
r > 0.9 ? encode[2](ch) : r > 0.45 ? encode[1](ch) : encode[0](ch)
showdown.helper.padEnd = function padEnd (str, targetLength, padString) {
/*jshint bitwise: false*/
// eslint-disable-next-line space-infix-ops
targetLength = targetLength>>0; //floor if number or convert non-number to 0;
padString = String(padString || ' ');
if (str.length > targetLength) {
targetLength = targetLength - str.length;
if (targetLength > padString.length) {
padString += padString.repeat(targetLength / padString.length); //append to original to ensure we are longer than needed
return String(str) + padString.slice(0,targetLength);
// use this instead of builtin is undefined for IE8 compatibility
if (typeof console === 'undefined') {
* We declare some common regexes to improve performance
showdown.helper.regexes = {
asteriskDashAndColon: /([*_:~])/g
showdown.helper.emojis = {
'1st_place_medal':'\ud83e\udd47',
'2nd_place_medal':'\ud83e\udd48',
'3rd_place_medal':'\ud83e\udd49',
'a':'\ud83c\udd70\ufe0f',
'aerial_tramway':'\ud83d\udea1',
'airplane':'\u2708\ufe0f',
'alembic':'\u2697\ufe0f',
'ambulance':'\ud83d\ude91',
'amphora':'\ud83c\udffa',
'anguished':'\ud83d\ude27',
'aquarius':'\u2652\ufe0f',
'arrow_backward':'\u25c0\ufe0f',
'arrow_double_down':'\u23ec',
'arrow_double_up':'\u23eb',
'arrow_down':'\u2b07\ufe0f',
'arrow_down_small':'\ud83d\udd3d',
'arrow_forward':'\u25b6\ufe0f',
'arrow_heading_down':'\u2935\ufe0f',
'arrow_heading_up':'\u2934\ufe0f',
'arrow_left':'\u2b05\ufe0f',
'arrow_lower_left':'\u2199\ufe0f',
'arrow_lower_right':'\u2198\ufe0f',
'arrow_right':'\u27a1\ufe0f',
'arrow_right_hook':'\u21aa\ufe0f',
'arrow_up':'\u2b06\ufe0f',
'arrow_up_down':'\u2195\ufe0f',
'arrow_up_small':'\ud83d\udd3c',
'arrow_upper_left':'\u2196\ufe0f',
'arrow_upper_right':'\u2197\ufe0f',
'arrows_clockwise':'\ud83d\udd03',
'arrows_counterclockwise':'\ud83d\udd04',
'articulated_lorry':'\ud83d\ude9b',
'artificial_satellite':'\ud83d\udef0',
'astonished':'\ud83d\ude32',
'athletic_shoe':'\ud83d\udc5f',
'atom_symbol':'\u269b\ufe0f',
'avocado':'\ud83e\udd51',
'b':'\ud83c\udd71\ufe0f',
'baby_bottle':'\ud83c\udf7c',
'baby_chick':'\ud83d\udc24',
'baby_symbol':'\ud83d\udebc',
'badminton':'\ud83c\udff8',
'baggage_claim':'\ud83d\udec4',
'baguette_bread':'\ud83e\udd56',
'balance_scale':'\u2696\ufe0f',
'balloon':'\ud83c\udf88',
'ballot_box':'\ud83d\uddf3',
'ballot_box_with_check':'\u2611\ufe0f',
'bangbang':'\u203c\ufe0f',
'bar_chart':'\ud83d\udcca',
'baseball':'\u26be\ufe0f',
'basketball':'\ud83c\udfc0',
'basketball_man':'\u26f9\ufe0f',
'basketball_woman':'\u26f9\ufe0f‍\u2640\ufe0f',
'bathtub':'\ud83d\udec1',
'battery':'\ud83d\udd0b',
'beach_umbrella':'\ud83c\udfd6',
'beginner':'\ud83d\udd30',
'bellhop_bell':'\ud83d\udece',
'biking_man':'\ud83d\udeb4',
'biking_woman':'\ud83d\udeb4‍\u2640\ufe0f',
'biohazard':'\u2623\ufe0f',
'birthday':'\ud83c\udf82',
'black_circle':'\u26ab\ufe0f',
'black_flag':'\ud83c\udff4',
'black_heart':'\ud83d\udda4',
'black_joker':'\ud83c\udccf',
'black_large_square':'\u2b1b\ufe0f',
'black_medium_small_square':'\u25fe\ufe0f',
'black_medium_square':'\u25fc\ufe0f',
'black_nib':'\u2712\ufe0f',
'black_small_square':'\u25aa\ufe0f',
'black_square_button':'\ud83d\udd32',
'blonde_man':'\ud83d\udc71',
'blonde_woman':'\ud83d\udc71‍\u2640\ufe0f',
'blossom':'\ud83c\udf3c',
'blowfish':'\ud83d\udc21',
'blue_book':'\ud83d\udcd8',
'blue_car':'\ud83d\ude99',
'blue_heart':'\ud83d\udc99',
'bookmark':'\ud83d\udd16',
'bookmark_tabs':'\ud83d\udcd1',
'bouquet':'\ud83d\udc90',
'bowing_man':'\ud83d\ude47',
'bow_and_arrow':'\ud83c\udff9',
'bowing_woman':'\ud83d\ude47‍\u2640\ufe0f',
'bowling':'\ud83c\udfb3',
'boxing_glove':'\ud83e\udd4a',
'bride_with_veil':'\ud83d\udc70',
'bridge_at_night':'\ud83c\udf09',
'briefcase':'\ud83d\udcbc',
'broken_heart':'\ud83d\udc94',
'building_construction':'\ud83c\udfd7',
'bullettrain_front':'\ud83d\ude85',
'bullettrain_side':'\ud83d\ude84',
'burrito':'\ud83c\udf2f',
'business_suit_levitating':'\ud83d\udd74',
'busstop':'\ud83d\ude8f',
'bust_in_silhouette':'\ud83d\udc64',
'busts_in_silhouette':'\ud83d\udc65',
'butterfly':'\ud83e\udd8b',
'calendar':'\ud83d\udcc6',
'call_me_hand':'\ud83e\udd19',
'calling':'\ud83d\udcf2',
'camera_flash':'\ud83d\udcf8',
'camping':'\ud83c\udfd5',
'capital_abcd':'\ud83d\udd20',
'capricorn':'\u2651\ufe0f',
'card_file_box':'\ud83d\uddc3',
'card_index':'\ud83d\udcc7',
'card_index_dividers':'\ud83d\uddc2',
'carousel_horse':'\ud83c\udfa0',
'champagne':'\ud83c\udf7e',
'chart_with_downwards_trend':'\ud83d\udcc9',
'chart_with_upwards_trend':'\ud83d\udcc8',
'checkered_flag':'\ud83c\udfc1',
'cherries':'\ud83c\udf52',
'cherry_blossom':'\ud83c\udf38',
'chestnut':'\ud83c\udf30',
'chicken':'\ud83d\udc14',
'children_crossing':'\ud83d\udeb8',
'chipmunk':'\ud83d\udc3f',
'chocolate_bar':'\ud83c\udf6b',
'christmas_tree':'\ud83c\udf84',
'circus_tent':'\ud83c\udfaa',
'city_sunrise':'\ud83c\udf07',
'city_sunset':'\ud83c\udf06',
'cityscape':'\ud83c\udfd9',
'clapper':'\ud83c\udfac',
'classical_building':'\ud83c\udfdb',
'clinking_glasses':'\ud83e\udd42',
'clipboard':'\ud83d\udccb',
'clock10':'\ud83d\udd59',
'clock1030':'\ud83d\udd65',
'clock11':'\ud83d\udd5a',
'clock1130':'\ud83d\udd66',
'clock12':'\ud83d\udd5b',
'clock1230':'\ud83d\udd67',
'clock130':'\ud83d\udd5c',
'clock230':'\ud83d\udd5d',
'clock330':'\ud83d\udd5e',
'clock430':'\ud83d\udd5f',
'clock530':'\ud83d\udd60',
'clock630':'\ud83d\udd61',
'clock730':'\ud83d\udd62',
'clock830':'\ud83d\udd63',
'clock930':'\ud83d\udd64',
'closed_book':'\ud83d\udcd5',
'closed_lock_with_key':'\ud83d\udd10',
'closed_umbrella':'\ud83c\udf02',
'cloud_with_lightning':'\ud83c\udf29',
'cloud_with_lightning_and_rain':'\u26c8',
'cloud_with_rain':'\ud83c\udf27',
'cloud_with_snow':'\ud83c\udf28',
'clown_face':'\ud83e\udd21',
'cocktail':'\ud83c\udf78',
'cold_sweat':'\ud83d\ude30',
'computer':'\ud83d\udcbb',
'computer_mouse':'\ud83d\uddb1',
'confetti_ball':'\ud83c\udf8a',
'confounded':'\ud83d\ude16',
'confused':'\ud83d\ude15',
'congratulations':'\u3297\ufe0f',
'construction':'\ud83d\udea7',
'construction_worker_man':'\ud83d\udc77',
'construction_worker_woman':'\ud83d\udc77‍\u2640\ufe0f',
'control_knobs':'\ud83c\udf9b',
'convenience_store':'\ud83c\udfea',
'policeman':'\ud83d\udc6e',
'copyright':'\u00a9\ufe0f',
'couch_and_lamp':'\ud83d\udecb',
'couple_with_heart_woman_man':'\ud83d\udc91',
'couple_with_heart_man_man':'\ud83d\udc68‍\u2764\ufe0f‍\ud83d\udc68',
'couple_with_heart_woman_woman':'\ud83d\udc69‍\u2764\ufe0f‍\ud83d\udc69',
'couplekiss_man_man':'\ud83d\udc68‍\u2764\ufe0f‍\ud83d\udc8b‍\ud83d\udc68',
'couplekiss_man_woman':'\ud83d\udc8f',
'couplekiss_woman_woman':'\ud83d\udc69‍\u2764\ufe0f‍\ud83d\udc8b‍\ud83d\udc69',
'cowboy_hat_face':'\ud83e\udd20',
'credit_card':'\ud83d\udcb3',
'crescent_moon':'\ud83c\udf19',
'cricket':'\ud83c\udfcf',
'crocodile':'\ud83d\udc0a',
'croissant':'\ud83e\udd50',
'crossed_fingers':'\ud83e\udd1e',
'crossed_flags':'\ud83c\udf8c',
'crossed_swords':'\u2694\ufe0f',
'crying_cat_face':'\ud83d\ude3f',
'crystal_ball':'\ud83d\udd2e',
'cucumber':'\ud83e\udd52',
'currency_exchange':'\ud83d\udcb1',
'custard':'\ud83c\udf6e',
'customs':'\ud83d\udec3',
'cyclone':'\ud83c\udf00',
'dancing_women':'\ud83d\udc6f',
'dancing_men':'\ud83d\udc6f‍\u2642\ufe0f',
'dark_sunglasses':'\ud83d\udd76',
'deciduous_tree':'\ud83c\udf33',
'department_store':'\ud83c\udfec',
'derelict_house':'\ud83c\udfda',
'desert_island':'\ud83c\udfdd',
'desktop_computer':'\ud83d\udda5',
'male_detective':'\ud83d\udd75\ufe0f',
'diamond_shape_with_a_dot_inside':'\ud83d\udca0',
'diamonds':'\u2666\ufe0f',
'disappointed':'\ud83d\ude1e',
'disappointed_relieved':'\ud83d\ude25',
'dizzy_face':'\ud83d\ude35',
'do_not_litter':'\ud83d\udeaf',
'dolphin':'\ud83d\udc2c',
'doughnut':'\ud83c\udf69',
'dragon_face':'\ud83d\udc32',
'dromedary_camel':'\ud83d\udc2a',
'drooling_face':'\ud83e\udd24',
'droplet':'\ud83d\udca7',
'ear_of_rice':'\ud83c\udf3e',
'earth_africa':'\ud83c\udf0d',
'earth_americas':'\ud83c\udf0e',
'earth_asia':'\ud83c\udf0f',
'eggplant':'\ud83c\udf46',
'eight_pointed_black_star':'\u2734\ufe0f',
'eight_spoked_asterisk':'\u2733\ufe0f',
'electric_plug':'\ud83d\udd0c',
'elephant':'\ud83d\udc18',
'envelope_with_arrow':'\ud83d\udce9',
'european_castle':'\ud83c\udff0',
'european_post_office':'\ud83c\udfe4',
'evergreen_tree':'\ud83c\udf32',
'exclamation':'\u2757\ufe0f',
'expressionless':'\ud83d\ude11',
'eye_speech_bubble':'\ud83d\udc41‍\ud83d\udde8',
'eyeglasses':'\ud83d\udc53',
'face_with_head_bandage':'\ud83e\udd15',
'face_with_thermometer':'\ud83e\udd12',
'fist_oncoming':'\ud83d\udc4a',
'factory':'\ud83c\udfed',
'fallen_leaf':'\ud83c\udf42',
'family_man_woman_boy':'\ud83d\udc6a',
'family_man_boy':'\ud83d\udc68‍\ud83d\udc66',
'family_man_boy_boy':'\ud83d\udc68‍\ud83d\udc66‍\ud83d\udc66',
'family_man_girl':'\ud83d\udc68‍\ud83d\udc67',
'family_man_girl_boy':'\ud83d\udc68‍\ud83d\udc67‍\ud83d\udc66',
'family_man_girl_girl':'\ud83d\udc68‍\ud83d\udc67‍\ud83d\udc67',
'family_man_man_boy':'\ud83d\udc68‍\ud83d\udc68‍\ud83d\udc66',
'family_man_man_boy_boy':'\ud83d\udc68‍\ud83d\udc68‍\ud83d\udc66‍\ud83d\udc66',
'family_man_man_girl':'\ud83d\udc68‍\ud83d\udc68‍\ud83d\udc67',
'family_man_man_girl_boy':'\ud83d\udc68‍\ud83d\udc68‍\ud83d\udc67‍\ud83d\udc66',
'family_man_man_girl_girl':'\ud83d\udc68‍\ud83d\udc68‍\ud83d\udc67‍\ud83d\udc67',
'family_man_woman_boy_boy':'\ud83d\udc68‍\ud83d\udc69‍\ud83d\udc66‍\ud83d\udc66',
'family_man_woman_girl':'\ud83d\udc68‍\ud83d\udc69‍\ud83d\udc67',
'family_man_woman_girl_boy':'\ud83d\udc68‍\ud83d\udc69‍\ud83d\udc67‍\ud83d\udc66',
'family_man_woman_girl_girl':'\ud83d\udc68‍\ud83d\udc69‍\ud83d\udc67‍\ud83d\udc67',
'family_woman_boy':'\ud83d\udc69‍\ud83d\udc66',
'family_woman_boy_boy':'\ud83d\udc69‍\ud83d\udc66‍\ud83d\udc66',
'family_woman_girl':'\ud83d\udc69‍\ud83d\udc67',
'family_woman_girl_boy':'\ud83d\udc69‍\ud83d\udc67‍\ud83d\udc66',
'family_woman_girl_girl':'\ud83d\udc69‍\ud83d\udc67‍\ud83d\udc67',
'family_woman_woman_boy':'\ud83d\udc69‍\ud83d\udc69‍\ud83d\udc66',
'family_woman_woman_boy_boy':'\ud83d\udc69‍\ud83d\udc69‍\ud83d\udc66‍\ud83d\udc66',
'family_woman_woman_girl':'\ud83d\udc69‍\ud83d\udc69‍\ud83d\udc67',