{"version":3,"file":"virtual_scroll.js","sources":["../../../node_modules/@orchidjs/sifter/lib/diacritics.ts","../../../node_modules/@orchidjs/sifter/lib/utils.ts","../../../src/vanilla.ts","../../../src/plugins/virtual_scroll/plugin.ts"],"sourcesContent":["\ntype TDiacraticList = {[key:string]:string};\n\n// https://github.com/andrewrk/node-diacritics/blob/master/index.js\n\nvar latin_pat:RegExp;\nconst accent_pat = '[\\u0300-\\u036F\\u{b7}\\u{2be}]'; // \\u{2bc}\nconst accent_reg = new RegExp(accent_pat,'g');\nvar diacritic_patterns:TDiacraticList;\n\nconst latin_convert:TDiacraticList = {\n\t'æ': 'ae',\n\t'ⱥ': 'a',\n\t'ø': 'o',\n};\n\nconst convert_pat = new RegExp(Object.keys(latin_convert).join('|'),'g');\n\n\nexport const DIACRITICS:TDiacraticList = {\n\t\" \":\" \",\n\t0:\"߀\",\n\tA:\"ⒶＡÀÁÂẦẤẪẨÃĀĂẰẮẴẲȦǠÄǞẢÅǺǍȀȂẠẬẶḀĄȺⱯ\",\n\tAA:\"Ꜳ\",\n\tAE:\"ÆǼǢ\",\n\tAO:\"Ꜵ\",\n\tAU:\"Ꜷ\",\n\tAV:\"ꜸꜺ\",\n\tAY:\"Ꜽ\",\n\tB:\"ⒷＢḂḄḆɃƁ\",\n\tC:\"ⒸＣꜾḈĆCĈĊČÇƇȻ\",\n\tD:\"ⒹＤḊĎḌḐḒḎĐƊƉᴅꝹ\",\n\tDh:\"Ð\",\n\tDZ:\"DZDŽ\",\n\tDz:\"DzDž\",\n\tE:\"ɛⒺＥÈÉÊỀẾỄỂẼĒḔḖĔĖËẺĚȄȆẸỆȨḜĘḘḚƐƎᴇ\",\n\tF:\"ꝼⒻＦḞƑꝻ\",\n\tG:\"ⒼＧǴĜḠĞĠǦĢǤƓꞠꝽꝾɢ\",\n\tH:\"ⒽＨĤḢḦȞḤḨḪĦⱧⱵꞍ\",\n\tI:\"ⒾＩÌÍÎĨĪĬİÏḮỈǏȈȊỊĮḬƗ\",\n\tJ:\"ⒿＪĴɈȷ\",\n\tK:\"ⓀＫḰǨḲĶḴƘⱩꝀꝂꝄꞢ\",\n\tL:\"ⓁＬĿĹĽḶḸĻḼḺŁȽⱢⱠꝈꝆꞀ\",\n\tLJ:\"LJ\",\n\tLj:\"Lj\",\n\tM:\"ⓂＭḾṀṂⱮƜϻ\",\n\tN:\"ꞤȠⓃＮǸŃÑṄŇṆŅṊṈƝꞐᴎ\",\n\tNJ:\"NJ\",\n\tNj:\"Nj\",\n\tO:\"ⓄＯÒÓÔỒỐỖỔÕṌȬṎŌṐṒŎȮȰÖȪỎŐǑȌȎƠỜỚỠỞỢỌỘǪǬØǾƆƟꝊꝌ\",\n\tOE:\"Œ\",\n\tOI:\"Ƣ\",\n\tOO:\"Ꝏ\",\n\tOU:\"Ȣ\",\n\tP:\"ⓅＰṔṖƤⱣꝐꝒꝔ\",\n\tQ:\"ⓆＱꝖꝘɊ\",\n\tR:\"ⓇＲŔṘŘȐȒṚṜŖṞɌⱤꝚꞦꞂ\",\n\tS:\"ⓈＳẞŚṤŜṠŠṦṢṨȘŞⱾꞨꞄ\",\n\tT:\"ⓉＴṪŤṬȚŢṰṮŦƬƮȾꞆ\",\n\tTh:\"Þ\",\n\tTZ:\"Ꜩ\",\n\tU:\"ⓊＵÙÚÛŨṸŪṺŬÜǛǗǕǙỦŮŰǓȔȖƯỪỨỮỬỰỤṲŲṶṴɄ\",\n\tV:\"ⓋＶṼṾƲꝞɅ\",\n\tVY:\"Ꝡ\",\n\tW:\"ⓌＷẀẂŴẆẄẈⱲ\",\n\tX:\"ⓍＸẊẌ\",\n\tY:\"ⓎＹỲÝŶỸȲẎŸỶỴƳɎỾ\",\n\tZ:\"ⓏＺŹẐŻŽẒẔƵȤⱿⱫꝢ\",\n\ta:\"ⓐａẚàáâầấẫẩãāăằắẵẳȧǡäǟảåǻǎȁȃạậặḁąⱥɐɑ\",\n\taa:\"ꜳ\",\n\tae:\"æǽǣ\",\n\tao:\"ꜵ\",\n\tau:\"ꜷ\",\n\tav:\"ꜹꜻ\",\n\tay:\"ꜽ\",\n\tb:\"ⓑｂḃḅḇƀƃɓƂ\",\n\tc:\"ｃⓒćĉċčçḉƈȼꜿↄ\",\n\td:\"ⓓｄḋďḍḑḓḏđƌɖɗƋᏧԁꞪ\",\n\tdh:\"ð\",\n\tdz:\"dzdž\",\n\te:\"ⓔｅèéêềếễểẽēḕḗĕėëẻěȅȇẹệȩḝęḙḛɇǝ\",\n\tf:\"ⓕｆḟƒ\",\n\tff:\"ff\",\n\tfi:\"fi\",\n\tfl:\"fl\",\n\tffi:\"ffi\",\n\tffl:\"ffl\",\n\tg:\"ⓖｇǵĝḡğġǧģǥɠꞡꝿᵹ\",\n\th:\"ⓗｈĥḣḧȟḥḩḫẖħⱨⱶɥ\",\n\thv:\"ƕ\",\n\ti:\"ⓘｉìíîĩīĭïḯỉǐȉȋịįḭɨı\",\n\tj:\"ⓙｊĵǰɉ\",\n\tk:\"ⓚｋḱǩḳķḵƙⱪꝁꝃꝅꞣ\",\n\tl:\"ⓛｌŀĺľḷḹļḽḻſłƚɫⱡꝉꞁꝇɭ\",\n\tlj:\"lj\",\n\tm:\"ⓜｍḿṁṃɱɯ\",\n\tn:\"ⓝｎǹńñṅňṇņṋṉƞɲʼnꞑꞥлԉ\",\n\tnj:\"nj\",\n\to:\"ⓞｏòóôồốỗổõṍȭṏōṑṓŏȯȱöȫỏőǒȍȏơờớỡởợọộǫǭøǿꝋꝍɵɔᴑ\",\n\toe:\"œ\",\n\toi:\"ƣ\",\n\too:\"ꝏ\",\n\tou:\"ȣ\",\n\tp:\"ⓟｐṕṗƥᵽꝑꝓꝕρ\",\n\tq:\"ⓠｑɋꝗꝙ\",\n\tr:\"ⓡｒŕṙřȑȓṛṝŗṟɍɽꝛꞧꞃ\",\n\ts:\"ⓢｓśṥŝṡšṧṣṩșşȿꞩꞅẛʂ\",\n\tss:\"ß\",\n\tt:\"ⓣｔṫẗťṭțţṱṯŧƭʈⱦꞇ\",\n\tth:\"þ\",\n\ttz:\"ꜩ\",\n\tu:\"ⓤｕùúûũṹūṻŭüǜǘǖǚủůűǔȕȗưừứữửựụṳųṷṵʉ\",\n\tv:\"ⓥｖṽṿʋꝟʌ\",\n\tvy:\"ꝡ\",\n\tw:\"ⓦｗẁẃŵẇẅẘẉⱳ\",\n\tx:\"ⓧｘẋẍ\",\n\ty:\"ⓨｙỳýŷỹȳẏÿỷẙỵƴɏỿ\",\n\tz:\"ⓩｚźẑżžẓẕƶȥɀⱬꝣ\"\n}\n\n/**\n * code points generated from toCodePoints();\n * removed 65339 to 65345\n */\nexport const code_points = [\n\t[ 67, 67 ],\n\t[ 160, 160 ],\n\t[ 192, 438 ],\n\t[ 452, 652 ],\n\t[ 961, 961 ],\n\t[ 1019, 1019 ],\n\t[ 1083, 1083 ],\n\t[ 1281, 1289 ],\n\t[ 1984, 1984 ],\n\t[ 5095, 5095 ],\n\t[ 7429, 7441 ],\n\t[ 7545, 7549 ],\n\t[ 7680, 7935 ],\n\t[ 8580, 8580 ],\n\t[ 9398, 9449 ],\n\t[ 11360, 11391 ],\n\t[ 42792, 42793 ],\n\t[ 42802, 42851 ],\n\t[ 42873, 42897 ],\n\t[ 42912, 42922 ],\n\t[ 64256, 64260 ],\n\t[ 65313, 65338 ],\n\t[ 65345, 65370 ]\n];\n\n/**\n * Remove accents\n * via https://github.com/krisk/Fuse/issues/133#issuecomment-318692703\n *\n */\nexport const asciifold = (str:string):string => {\n\treturn str\n\t\t.normalize('NFKD')\n\t\t.replace(accent_reg, '')\n\t\t.toLowerCase()\n\t\t.replace(convert_pat,function(foreignletter) {\n\t\t\treturn latin_convert[foreignletter];\n\t\t});\n};\n\n\n/**\n * Convert list of diacritics to array of code points\n *\n */\n// @ts-ignore\nfunction toCodePoints(tolerance=8){\n\tvar char_codes:number[] = [];\n\n\tfor( let letter in DIACRITICS ){\n\t\tlet _diacritics = DIACRITICS[letter];\n\t\tfor( let n = 0; n < _diacritics.length; n++ ){\n\t\t\tvar code_point = _diacritics.codePointAt(n);\n\t\t\tif( code_point ) char_codes.push( code_point );\n\t\t}\n\t}\n\n\t//https://stackoverflow.com/questions/40431572/is-there-a-simple-way-to-group-js-array-values-by-range\n\tchar_codes.sort((a, b) => a - b);\n\tvar accumulator: number[][] = [];\n\tchar_codes.reduce(function (accumulator, currentValue, index, source) {\n\n\t\tif( !index ){\n\t\t\taccumulator.push( [currentValue,currentValue] );\n\n\t\t}else if( currentValue - source[index - 1] > tolerance ){\n\t\t\taccumulator.push( [currentValue,currentValue] );\n\n\t\t}else{\n\n\t\t\tlet range = accumulator.pop();\n\t\t\tif( range ){\n\t\t\t\taccumulator.push( [range[0],currentValue]);\n\t\t\t}\n\t\t}\n\n\t\treturn accumulator;\n\t}, accumulator);\n\n}\n\n/**\n * Convert array of strings to a regular expression\n *\tex ['ab','a'] => (?:ab|a)\n * \tex ['a','b'] => [ab]\n *\n */\nexport const arrayToPattern = (chars:string[],glue:string='|'):string =>{\n\t\n\tif( chars.length == 1 ){\n\t\treturn chars[0];\n\t}\n\t\n\tvar longest = 1;\n\tchars.forEach((a)=>{longest = Math.max(longest,a.length)});\n\n\tif( longest == 1 ){\n\t\treturn '['+chars.join('')+']';\n\t}\n\n\treturn '(?:'+chars.join(glue)+')';\t\n};\n\n/**\n * Get all possible combinations of substrings that add up to the given string\n * https://stackoverflow.com/questions/30169587/find-all-the-combination-of-substrings-that-add-up-to-the-given-string\n *\n */\nexport const allSubstrings = (input:string):string[][] => {\n\n    if( input.length === 1) return [[input]];\n\n    var result:string[][] = [];\n    allSubstrings(input.substring(1)).forEach(function(subresult) {\n        var tmp = subresult.slice(0);\n        tmp[0] = input.charAt(0) + tmp[0];\n        result.push(tmp);\n\n        tmp = subresult.slice(0);\n        tmp.unshift(input.charAt(0));\n        result.push(tmp);\n    });\n    \n    return result;\n}\n\n/**\n * Generate a list of diacritics from the list of code points\n *\n */\nexport const generateDiacritics = ():TDiacraticList => {\t\n\n\tvar diacritics:{[key:string]:string[]} = {};\n\tcode_points.forEach((code_range)=>{\n\n\t\tfor(let i = code_range[0]; i <= code_range[1]; i++){\n\t\t\t\n\t\t\tlet diacritic\t= String.fromCharCode(i);\n\t\t\tlet\tlatin\t\t= asciifold(diacritic);\n\n\t\t\tif( latin == diacritic.toLowerCase() ){\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tif( !(latin in diacritics) ){\n\t\t\t\tdiacritics[latin] = [latin];\n\t\t\t}\n\t\t\t\n\t\t\tvar patt = new RegExp( arrayToPattern(diacritics[latin]),'iu');\n\t\t\tif( diacritic.match(patt) ){\n\t\t\t\tcontinue;\n\t\t\t}\n\t\t\t\n\t\t\tdiacritics[latin].push(diacritic);\n\t\t}\n\t});\n\t\t\n\tvar latin_chars = Object.keys(diacritics);\n\t\n\t\n\t// latin character pattern\n\t// match longer substrings first\n\tlatin_chars\t\t= latin_chars.sort((a, b) => b.length - a.length );\n\tlatin_pat\t\t= new RegExp('('+ arrayToPattern(latin_chars) + accent_pat + '*)','g');\n\t\n\t\n\t// build diacritic patterns\n\t// ae needs: \n\t//\t(?:(?:ae|Æ|Ǽ|Ǣ)|(?:A|Ⓐ|Ａ...)(?:E|ɛ|Ⓔ...))\n\tvar diacritic_patterns:TDiacraticList = {};\n\tlatin_chars.sort((a,b) => a.length -b.length).forEach((latin)=>{\n\t\t\n\t\tvar substrings\t= allSubstrings(latin);\n\t\tvar pattern = substrings.map((sub_pat)=>{\n\t\t\t\n\t\t\tsub_pat = sub_pat.map((l)=>{\n\t\t\t\tif( diacritics.hasOwnProperty(l) ){\n\t\t\t\t\treturn arrayToPattern(diacritics[l]);\n\t\t\t\t}\n\t\t\t\treturn l;\n\t\t\t});\n\t\t\t\n\t\t\treturn arrayToPattern(sub_pat,'');\n\t\t});\n\t\t\n\t\tdiacritic_patterns[latin] = arrayToPattern(pattern);\t\t\n\t});\n\t\t\t\n\treturn diacritic_patterns;\n}\n\n/**\n * Expand a regular expression pattern to include diacritics\n * \teg /a/ becomes /aⓐａẚàáâầấẫẩãāăằắẵẳȧǡäǟảåǻǎȁȃạậặḁąⱥɐɑAⒶＡÀÁÂẦẤẪẨÃĀĂẰẮẴẲȦǠÄǞẢÅǺǍȀȂẠẬẶḀĄȺⱯ/\n *\n */\nexport const diacriticRegexPoints = (regex:string):string => {\n\n\tif( diacritic_patterns === undefined ){\n\t\tdiacritic_patterns = generateDiacritics();\n\t}\n\t\n\tconst decomposed\t\t= regex.normalize('NFKD').toLowerCase();\n\t\n\treturn decomposed.split(latin_pat).map((part:string)=>{\n\t\t\n\t\tif( part == '' ){\n\t\t\treturn '';\n\t\t}\n\t\t\n\t\t// \"ffl\" or \"ffl\"\n\t\tconst no_accent = asciifold(part);\t\t\t\t\n\t\tif( diacritic_patterns.hasOwnProperty(no_accent) ){\n\t\t\treturn diacritic_patterns[no_accent];\n\t\t}\n\t\t\n\t\t// 'أهلا' (\\u{623}\\u{647}\\u{644}\\u{627}) or 'أهلا' (\\u{627}\\u{654}\\u{647}\\u{644}\\u{627})\n\t\tconst composed_part = part.normalize('NFC');\n\t\tif( composed_part != part ){\n\t\t\treturn arrayToPattern([part,composed_part]);\n\t\t}\n\t\t\t\t\n\t\treturn part;\n\t}).join('');\n\t\n}\n","\n// @ts-ignore TS2691 \"An import path cannot end with a '.ts' extension\"\nimport { asciifold } from './diacritics.ts';\n\n// @ts-ignore TS2691 \"An import path cannot end with a '.ts' extension\"\nimport * as T from './types.ts';\n\n\n/**\n * A property getter resolving dot-notation\n * @param  {Object}  obj     The root object to fetch property on\n * @param  {String}  name    The optionally dotted property name to fetch\n * @return {Object}          The resolved property value\n */\nexport const getAttr = (obj:{[key:string]:any}, name:string ) => {\n    if (!obj ) return;\n    return obj[name];\n};\n\n/**\n * A property getter resolving dot-notation\n * @param  {Object}  obj     The root object to fetch property on\n * @param  {String}  name    The optionally dotted property name to fetch\n * @return {Object}          The resolved property value\n */\nexport const getAttrNesting = (obj:{[key:string]:any}, name:string ) => {\n    if (!obj ) return;\n    var part, names = name.split(\".\");\n\twhile( (part = names.shift()) && (obj = obj[part]));\n    return obj;\n};\n\n/**\n * Calculates how close of a match the\n * given value is against a search token.\n *\n */\nexport const scoreValue = (value:string, token:T.Token, weight:number ):number => {\n\tvar score, pos;\n\n\tif (!value) return 0;\n\n\tvalue = value + '';\n\tpos = value.search(token.regex);\n\tif (pos === -1) return 0;\n\n\tscore = token.string.length / value.length;\n\tif (pos === 0) score += 0.5;\n\n\treturn score * weight;\n};\n\n/**\n *\n * https://stackoverflow.com/questions/63006601/why-does-u-throw-an-invalid-escape-error\n */\nexport const escape_regex = (str:string):string => {\t\n\treturn (str + '').replace(/([\\$\\(\\)\\*\\+\\.\\?\\[\\]\\^\\{\\|\\}\\\\])/gu, '\\\\$1');\n};\n\n\n/**\n * Cast object property to an array if it exists and has a value\n *\n */\nexport const propToArray = (obj:{[key:string]:any}, key:string) => {\n\tvar value = obj[key];\n\t\n\tif( typeof value == 'function' ) return value;\n\t\n\tif( value && !Array.isArray(value) ){\n\t\tobj[key] = [value];\n\t}\n}\n\n\n/**\n * Iterates over arrays and hashes.\n *\n * ```\n * iterate(this.items, function(item, id) {\n *    // invoked for each item\n * });\n * ```\n *\n */\nexport const iterate = (object:[]|{[key:string]:any}, callback:(value:any,key:number|string)=>any) => {\n\n\tif ( Array.isArray(object)) {\n\t\tobject.forEach(callback);\n\n\t}else{\n\n\t\tfor (var key in object) {\n\t\t\tif (object.hasOwnProperty(key)) {\n\t\t\t\tcallback(object[key], key);\n\t\t\t}\n\t\t}\n\t}\n};\n\n\n\nexport const cmp = (a:number|string, b:number|string) => {\n\tif (typeof a === 'number' && typeof b === 'number') {\n\t\treturn a > b ? 1 : (a < b ? -1 : 0);\n\t}\n\ta = asciifold(a + '').toLowerCase();\n\tb = asciifold(b + '').toLowerCase();\n\tif (a > b) return 1;\n\tif (b > a) return -1;\n\treturn 0;\n};\n","\nimport { iterate } from '@orchidjs/sifter/lib/utils';\n\n/**\n * Return a dom element from either a dom query string, jQuery object, a dom element or html string\n * https://stackoverflow.com/questions/494143/creating-a-new-dom-element-from-an-html-string-using-built-in-dom-methods-or-pro/35385518#35385518\n *\n * param query should be {}\n */\nexport const getDom = ( query:any ):HTMLElement => {\n\n\tif( query.jquery ){\n\t\treturn query[0];\n\t}\n\n\tif( query instanceof HTMLElement ){\n\t\treturn query;\n\t}\n\n\tif( isHtmlString(query) ){\n\t\tlet div = document.createElement('div');\n\t\tdiv.innerHTML = query.trim(); // Never return a text node of whitespace as the result\n\t\treturn div.firstChild as HTMLElement;\n\t}\n\n\treturn document.querySelector(query);\n};\n\nexport const isHtmlString = (arg:any): boolean => {\n\tif( typeof arg === 'string' && arg.indexOf('<') > -1 ){\n\t\treturn true;\n\t}\n\treturn false;\n}\n\nexport const escapeQuery = (query:string):string => {\n\treturn query.replace(/['\"\\\\]/g, '\\\\$&');\n}\n\n/**\n * Dispatch an event\n *\n */\nexport const triggerEvent = ( dom_el:HTMLElement, event_name:string ):void => {\n\tvar event = document.createEvent('HTMLEvents');\n\tevent.initEvent(event_name, true, false);\n\tdom_el.dispatchEvent(event)\n};\n\n/**\n * Apply CSS rules to a dom element\n *\n */\nexport const applyCSS = ( dom_el:HTMLElement, css:{ [key: string]: string|number }):void => {\n\tObject.assign(dom_el.style, css);\n}\n\n\n/**\n * Add css classes\n *\n */\nexport const addClasses = ( elmts:HTMLElement|HTMLElement[], ...classes:string[]|string[][] ) => {\n\n\tvar norm_classes \t= classesArray(classes);\n\telmts\t\t\t\t= castAsArray(elmts);\n\n\telmts.map( el => {\n\t\tnorm_classes.map( cls => {\n\t\t\tel.classList.add( cls );\n\t\t});\n\t});\n}\n\n/**\n * Remove css classes\n *\n */\n export const removeClasses = ( elmts:HTMLElement|HTMLElement[], ...classes:string[]|string[][] ) => {\n\n \tvar norm_classes \t= classesArray(classes);\n\telmts\t\t\t\t= castAsArray(elmts);\n\n\telmts.map( el => {\n\t\tnorm_classes.map(cls => {\n\t \t\tel.classList.remove( cls );\n\t\t});\n \t});\n }\n\n\n/**\n * Return arguments\n *\n */\nexport const classesArray = (args:string[]|string[][]):string[] => {\n\tvar classes:string[] = [];\n\titerate( args, (_classes) =>{\n\t\tif( typeof _classes === 'string' ){\n\t\t\t_classes = _classes.trim().split(/[\\11\\12\\14\\15\\40]/);\n\t\t}\n\t\tif( Array.isArray(_classes) ){\n\t\t\tclasses = classes.concat(_classes);\n\t\t}\n\t});\n\n\treturn classes.filter(Boolean);\n}\n\n\n/**\n * Create an array from arg if it's not already an array\n *\n */\nexport const castAsArray = (arg:any):Array<any> => {\n\tif( !Array.isArray(arg) ){\n \t\targ = [arg];\n \t}\n\treturn arg;\n}\n\n\n/**\n * Get the closest node to the evt.target matching the selector\n * Stops at wrapper\n *\n */\nexport const parentMatch = ( target:null|HTMLElement, selector:string, wrapper?:HTMLElement ):HTMLElement|void => {\n\n\tif( wrapper && !wrapper.contains(target) ){\n\t\treturn;\n\t}\n\n\twhile( target && target.matches ){\n\n\t\tif( target.matches(selector) 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You may obtain a copy of the License at:\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software distributed under\n * the License is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF\n * ANY KIND, either express or implied. See the License for the specific language\n * governing permissions and limitations under the License.\n *\n */\n\nimport TomSelect from '../../tom-select';\nimport { TomOption } from '../../types/index';\nimport { addClasses } from '../../vanilla';\n\nexport default function(this:TomSelect) {\n\tconst self\t\t\t\t\t\t\t= this;\n\tconst orig_canLoad\t\t\t\t\t= self.canLoad;\n\tconst orig_clearActiveOption\t\t= self.clearActiveOption;\n\tconst orig_loadCallback\t\t\t\t= self.loadCallback;\n\n\tvar pagination:{[key:string]:any}\t= {};\n\tvar dropdown_content:HTMLElement;\n\tvar loading_more\t\t\t\t\t= false;\n\tvar load_more_opt:HTMLElement;\n\n\n\tif( !self.settings.shouldLoadMore ){\n\n\t\t// return true if additional results should be loaded\n\t\tself.settings.shouldLoadMore = function():boolean{\n\n\t\t\tconst scroll_percent = dropdown_content.clientHeight / (dropdown_content.scrollHeight - dropdown_content.scrollTop);\n\t\t\tif( scroll_percent > 0.9 ){\n\t\t\t\treturn 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