Run results for: Classnames vs CLSX vs composeCssClass 03

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/113.0

Browser: Firefox 113

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
classnames	2729048.2 Ops/sec
clsx	4429766.5 Ops/sec
custom implemenatation	7952374.0 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/classnames/2.3.2/index.min.js'></script>
<script src='https://unpkg.com/clsx@1.2.1/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']

function composeCssClass(...values) {
    let className = ''

    for (let valueIndex = 0, valuesLength = values.length; valueIndex < valuesLength; valueIndex += 1) {
        const value = values[valueIndex]

        switch (true) {
            case !value: {
                continue
            }
            case typeof value === 'string':
            case typeof value === 'number': {

                className = className + (className && ' ') + value
                continue
            }
            case Array.isArray(value): {
                const valueFromArray = composeCssClass(...value)

                if (valueFromArray) {
                    className = className + (className && ' ') + valueFromArray
                }
                continue
            }
            case typeof value === 'object': {
                for (const key in value) {
                    if (value[key]) {
                        className = className + (className && ' ') + key
                    }
                }
                continue
            }
        }
    }

    return className || undefined
}

Tests:

classnames
let result = window.classNames(str, obj, arr, 'test classname')
clsx
let result = window.clsx(str, obj, arr, 'test classname')
custom implemenatation
let result = composeCssClass(str, obj, arr, 'test classname')

Run results for: Classnames vs CLSX vs composeCssClass 03

Compare CLSX vs Classnames vs composeCssClass

classnames

clsx

custom implemenatation