Run results for: Classnames vs CLSX vs Alternatives vs Template Literals vs Template Literals (recursive)

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:104.0) Gecko/20100101 Firefox/104.0

Browser: Firefox 104

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
classnames	2158351.8 Ops/sec
clsx	3441581.8 Ops/sec
Array based	2030312.9 Ops/sec
String based (return struct)	3171138.2 Ops/sec
String based (if-else struct)	3206107.5 Ops/sec
Entries, filter, map, join	2627531.8 Ops/sec
String literally	1372524160.0 Ops/sec
Recursive tagged template literal	791627.2 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/classnames/2.2.6/index.min.js'></script>
<script src='https://unpkg.com/clsx@1.1.0/dist/clsx.min.js'></script>

Script Preparation code:

var str = 'style';
var obj = {
 	 'style-2': true,
  	 'style-3': false,
 	 'style-4': true,
}
var arr = ['style-5', 'style-6']

Tests:

classnames
let result = window.classNames(str, obj, arr, 'test classname')
clsx
let result = window.clsx(str, obj, arr, 'test classname')
Array based
function ts(...args){ let template = []; args.forEach(arg => { if (typeof arg === 'string') { template.push(arg); return; } if (arg.join) { template = [...template, ...arg]; return; } let entries = Object.entries(arg); if (entries.length) { entries.forEach(entry => { if(entry[1]) template.push(entry[0]) }) } }) return template.join(' '); } let result = ts(str, obj, arr, 'test classname')
String based (return struct)
function ts(...args){ let template = ''; args.forEach(arg => { if (typeof arg === 'string') { template += ' '+arg; return; } if (arg.join) { arg.forEach((e) => { template += ' ' + e; }) return; } let entries = Object.entries(arg); if (entries.length) { entries.forEach(entry => { if(entry[1]) template += ' ' + entry[0] }) } }) return template; } let result = ts(str, obj, arr, 'test classname')
String based (if-else struct)
function ts(...args){ let template = ''; args.forEach(arg => { if (typeof arg === 'string') { template += ' '+arg; } else if (arg.join) { arg.forEach((e) => { template += ' ' + e; }) } else { let entries = Object.entries(arg); if (entries.length) { entries.forEach(entry => { if(entry[1]) template += ' ' + entry[0] }) } } }) return template; } let result = ts(str, obj, arr, 'test classname')
Entries, filter, map, join
let objStyle = Object.entries(obj).filter((style)=>style[1]).map(style => style[0]).join(' '); let arrComb = arr.join(' ') let result = `${str} ${objStyle} ${arrComb} test classname`
String literally
var literal = `style ${true ? "style-2" : ""} ${false ? "style-3" : ""} ${true ? "style-4" : ""} style-5 style-6`
Recursive tagged template literal
const toCls = (arg) => { if (typeof arg === 'boolean') return ""; if (typeof arg === 'string') return ` ${arg}`; if (Array.isArray(arg)) return arg.map(a => toCls(a)); if (typeof arg === 'object') return toCls(Object.entries(arg).filter(e => e[1]).map(e => e[0])); throw new Error("Invalid arg: `${arg}`"); }; const cls = (s, ...args) => { //console.log(s) //console.log(args) let classNames = ""; args.forEach((expr, i) => { if (s[i] != "" && s[i] != " ") classNames += ` ${s[i]}`; classNames += toCls(expr); }); classNames += s[s.length - 1]; return classNames; }; let result = cls`${str} ${obj} ${arr} test classname`;

Run results for: Classnames vs CLSX vs Alternatives vs Template Literals vs Template Literals (recursive)

Compare CLSX vs Classnames vs an own implementation of creating a template string

classnames

clsx

Array based

String based (return struct)

String based (if-else struct)

Entries, filter, map, join

String literally

Recursive tagged template literal