Created
November 3, 2019 09:11
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Convert JS style object to injectable CSS
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function toKebabCase(string) { | |
return string.replace(/([a-z0-9]|(?=[A-Z]))([A-Z])/g, '$1-$2').toLowerCase(); | |
} | |
function hash(string) { | |
var h = 0 | |
var i = 0; | |
if (string.length > 0) { | |
while (i < string.length) { | |
h = (h << 5) - h + string.charCodeAt(i++) | 0; | |
} | |
} | |
return h; | |
} | |
var unitless = [ | |
'z-index', | |
'font-weight', | |
'line-height', | |
'counter-reset', | |
'counter-increment', | |
'volume', | |
'stress', | |
'pitch-range', | |
'richness', | |
]; | |
function css(style) { | |
var output = '{'; | |
style && Object.keys(style).forEach(function (key) { | |
var property = toKebabCase(key); | |
var value = style[key]; | |
if (typeof value === 'number' && value > 0 && !unitless.includes(property)) { | |
value += 'px'; | |
} | |
output += `\n\t${property}: ${value};` | |
}); | |
output += `\n}`; | |
var className = hash(JSON.stringify(style)); | |
return `.css-${className} ${output}`; | |
} | |
var style = { | |
margin: 10, | |
color: 'red', | |
padding: '20px', | |
fontFamily: '"Roboto", sans-serif', | |
}; | |
console.log(css(style)); |
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