hexToRGB(hex) { if (!/(^\#([a-fA-F0-9]{3})$)|(^\#([a-fA-F0-9]{6})$)/g.test(hex)) return null; let allNumberStr = "0123456789abcdef"; // 十六进制的所有数字 let len = hex.slice(1).length; let str = len === 6 ? hex.slice(1) : hex.slice(1)[0].repeat(2) + hex.slice(1)[1].repeat(2) + hex.slice(1)[2].repeat(2); let arrStr = str.split(""); let newArrStr = arrStr.map((item, index) => { return allNumberStr.indexOf((item + "").toLowerCase()); }); let num1 = newArrStr[0] * 16 + newArrStr[1]; let num2 = newArrStr[2] * 16 + newArrStr[3]; let num3 = newArrStr[4] * 16 + newArrStr[5]; return `rgb(${num1}, ${num2}, ${num3}, 0.5)`; },
标签：slice,颜色,一半,hex,newArrStr,repeat,let,return From： https://www.cnblogs.com/zhangxingxia/p/17909467.html