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May 11, 2019 18:46
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Hex to RGBa (Javascript)
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| const hexToRgbA = (hex, alpha = 1) => { | |
| let c | |
| if (/^#([A-Fa-f0-9]{3}){1,2}$/.test(hex)) { | |
| c = hex.substring(1).split('') | |
| if (c.length== 3) { | |
| c = [c[0], c[0], c[1], c[1], c[2], c[2]] | |
| } | |
| c = '0x' + c.join('') | |
| return 'rgba('+[(c>>16)&255, (c>>8)&255, c&255].join(',') + ',' + alpha + ')' | |
| } | |
| throw new Error('Bad Hex') | |
| } | |
| hexToRgbA('2A2F33') // 'rgba(44,47,51,1)' | |
| hexToRgbA('2A2F33', 0.5) // 'rgba(44,47,51,0.5)' |
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