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yanzong_qianduan/utils/color.js

68 lines
1.9 KiB

5 months ago
/**
* 16进制转rgb
* @param {String} color
* @returns {String}
*/
export const hex2rgb = (color) => {
var reg = /^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/
var sColor = color.toLowerCase()
if (sColor && reg.test(sColor)) {
if (sColor.length === 4) {
var sColorNew = "#"
for (var i = 1; i < 4; i += 1) {
sColorNew += sColor.slice(i, i + 1).concat(sColor.slice(i, i + 1))
}
sColor = sColorNew
}
//处理六位的颜色值
var sColorChange = [];
for (var i = 1; i <= 6; i += 2) {
sColorChange.push(parseInt("0x" + sColor.slice(i, i + 2)));
}
return "rgba(" + sColorChange.join(",") + ")"
} else {
return sColor
}
}
// rbg带透明度转16进制
export const rgb2hex = (color) => {
var values = color
.replace(/rgba?\(/, '')
.replace(/\)/, '')
.replace(/[\s+]/g, '')
.split(',')
var a = parseFloat(values[3] || 1),
r = Math.floor(a * parseInt(values[0]) + (1 - a) * 255),
g = Math.floor(a * parseInt(values[1]) + (1 - a) * 255),
b = Math.floor(a * parseInt(values[2]) + (1 - a) * 255);
return "#" +
("0" + r.toString(16)).slice(-2) +
("0" + g.toString(16)).slice(-2) +
("0" + b.toString(16)).slice(-2)
}
// 16进制转换rgb,并设置透明度
export const hex2rgba = (color, opacity) => {
var theColor = color.toLowerCase()
//十六进制颜色值的正则表达式
var r = /^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/
// 如果是16进制颜色
if (theColor && r.test(theColor)) {
if (theColor.length === 4) {
var sColorNew = "#"
for (var i = 1; i < 4; i += 1) {
sColorNew += theColor.slice(i, i + 1).concat(theColor.slice(i, i + 1))
}
theColor = sColorNew
}
//处理六位的颜色值
var sColorChange = []
for (var i = 1; i < 7; i += 2) {
sColorChange.push(parseInt("0x" + theColor.slice(i, i + 2)))
}
return "rgba(" + sColorChange.join(",") + "," + opacity + ")"
}
return theColor
}