js基础5 — 将十六进制颜色转为rgba() varcolors = ['#eEE','#ffffff','#000000','#cf8','#be2626']; String.prototype.colorRgb=function(){varcolor =this.toLowerCase();varpattern = /^#([0-9|a-f]{3}|[0-9|a-f]{6})$/;if(color &&pattern.test(color)) {if(color.length == ...
// 十六进制转rgb值functioncolorRgb(string){letsColor=string.toLowerCase()// let reg = /^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/letsColorChange=[]// if (sColor && reg.test(sColor)) {for(leti=1;i<7;i+=2){sColorChange.push(parseInt("0x"+sColor.slice(i,i+2)));}// }...
slice(2, 4), 16); let b = parseInt(hex.slice(4, 6), 16); return [r, g, b]; } // 处理RGBA格式 if (/^rgba?\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*(,\s*[0-1](?:\.\d+)?)?\s*\)$/i.test(color)) { let [, r, g, b] = color.match(/^rgba?\(\...
functionhexToRgba(hexColor,alpha=.5){// 移除 # 号并提取颜色值varhex=hexColor.replace('#','');// 将颜色值拆分成 R、G、B 三个部分varr=parseInt(hex.substring(0,2),16);varg=parseInt(hex.substring(2,4),16);varb=parseInt(hex.substring(4,6),16);// 转换为 RGBA 格式并添加透明度var...
js实现 RGB颜色值 转 十六进制颜色值 在线体验 var colorChange = {rgbToHex: function (val) { //RGB(A)颜色转换为HEX十六进制的颜色值var r, g, b, a,regRgba = /rgba?\((\d{1,3}),(\d{1,3}),(\d{1,3})(,([.\d]+))?\)/, //判断rgb颜色值格式的正则表达式,如rgba(255,20,10...
[js] 实现颜色转换 rgba hex hex转rgba const hex2Rgba = (bgColor, alpha = 1) => { let color = bgColor.slice(1); // 去掉'#'号 let rgba = [ parseInt("0x" + color.slice(0, 2)), parseInt("0x" + color.slice(2, 4)),
colorRgba(sHex, alpha = 1) {varreg = /^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/; let sColor=sHex.toLowerCase();if(sColor & .test(sColor)) {if(sColor.length === 4) {varsColorNew = '#';for(let i = 1; i < 4; i += 1) { ...
let [r, g, b, alpha] = rgba(color)Returns channels values as they are in the input color string argument. alpha is always from 0..1 range. color can be a CSS color string, an array with channel values, an object etc., see color-parse....
color: rgba(255, 0, 0, 1); } 既然每个像素点可以通过rgba的值来表达,那么一张图片所包含的所有像素点都可以转换成数据.如果修改某部分像素点的rgba值,那该图片渲染出来的效果就会发生变化,这样便实现了图片的编辑. 那怎么把图片转化成由像素点组成的数据呢?
项目中遇到后端配置颜色#FFF16C0E是8位,但是前端解析可能无法展示,需要转成rgba形式后渲染,以下代码仅供参考, 适用于将 #ffffffff 转为 rgba(255,255,255,1) functionparseRGBA(val){val=val.trim().toLowerCase();//去掉前后空格letcolor={};try{letargb=/^#?([a-f\d]{2})([a-f\d]{2})([a...