2.html代码：index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script src="https://www.jb51.net/article/jquery-1.12.4.min.js"></script> </head> <body> <img src="https://www.jb51.net/article/test2.jpg" alt=""> <div></div> </body> </html>
3.插件代码：
(function ($) { $.fn.pickerColor=function (option) { var opt ={ ck:function () {} },_this=this opt=$.extend(opt,option); _this.on('click',function (e) { var canvasObj = '<canvas></canvas>'; $('body').append(canvasObj); var cvs = document.getElementById("canvasPickerColor"),ctx =cvs.getContext('2d') cvs.height=1;cvs.width=1 var img = new Image(); img.src=_this.attr('src'); var osX=e.offsetX,osY=e.offsetY ctx.drawImage(img,osX,osY,1,1,0,0,1,1); var imgData=ctx.getImageData(0,0,1,1); console.log(imgData) if(opt.ck) opt.ck(imgData.data[0]+','+imgData.data[1]+','+imgData.data[2]); }) } })(jQuery)
3，插件调用
$(function () { $('.source').pickerColor({ ck:function (data) { console.log(data) $('.color').css('background','rgba('+data+',1)') } }) })