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Test for CSS Variables
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function testCSSVariables() { | |
var color = 'rgb(255, 198, 0)'; | |
var el = document.createElement('span'); | |
el.style.setProperty('--color', color); | |
el.style.setProperty('background', 'var(--color)'); | |
document.body.appendChild(el); | |
var styles = getComputedStyle(el); | |
var doesSupport = styles.backgroundColor === color; | |
document.body.removeChild(el); | |
return doesSupport; | |
} | |
testCSSVariables(); |
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https://stackoverflow.com/a/26633844/1429097 answers it pretty well