写一个js获取网页验证码图片到剪切板

下面是一个使用JavaScript获取网页验证码图片到剪切板的示例代码：// 获取图片
function getImage() {
var img = document.getElementById("captchaImage");
var canvas = document.createElement("canvas");
canvas.width = img.width;
canvas.height = img.height;
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
return canvas.toDataURL('image/png').replace('data:image/png;base64,', '');
}// 设置剪切板
function setClipboard(text) {
var textArea = document.createElement("textarea");
textArea.style.cssText = 'position:absolute;left:-9999px;top:-9999px;';
document.body.appendChild(textArea);
textArea.value = text;
textArea.select();
document.execCommand('copy');
document.body.removeChild(textArea);
}// 获取图片，并设置剪切板
setClipboard(getImage());