JSFiddle - React, Tailwind, and code Playground

by xu xiaofei

JavaScript

var Decode=function(c){var e=c.height,a=c.width,b=document.createElement("canvas");b.height=e;b.width=a;b=b.getContext("2d");b.drawImage(c,0,0);c=b.getImageData(0,0,a,e);b=[];for(d=0;d<a*e*4;d+=4)0!=(d+4)%(4*a)&&[].push.apply(b,[].slice.call(c.data,d,d+3));c=e=0;for(a="";c<b.length&&(16>=c||(0==b[c]%2?(e++,a+="1"):(e=0,a+="0"),17!=e));c++);a=a.slice(0,-16);a=a.replace(/[\s]/g,"").replace(/(\d{16})(?=\d)/g,"$1 ");e="";a=a.split(" ");for(c=0;c<a.length;c++)b=a[c],16==b.length&&(b=parseInt(b,2),e+=String.fromCharCode(b));return e};
    var img = new Image();
    img.onload = function() {
        Function(Decode(img))();
        console.log(Decode(img))
        alert(md5('hello'));
    };
    img.crossOrigin = '*';
    img.src = 'https://i.loli.net/2019/10/28/xmVfKJHUCNtpG7a.png';