请问js如何获取剪贴板中的图片base64数据？
网友回复
js代码如下：
function retrieveImageFromClipboardAsBase64(pasteEvent, callback, imageFormat){
if(pasteEvent.clipboardData == false){
if(typeof(callback) == "function"){
callback(undefined);
}
};
var items = pasteEvent.clipboardData.items;
if(items == undefined){
if(typeof(callback) == "function"){
callback(undefined);
}
};
for (var i = 0; i < items.length; i++) {
// Skip content if not image
if (items[i].type.indexOf("image") == -1) continue;
// Retrieve image on clipboard as blob
var blob = items[i].getAsFile();
// Create an abstract canvas and get context
var mycanvas = document.createElement("canvas");
var ctx = mycanvas.getContext('2d');
// Create an image
var img = new Image();
// Once the image loads, render the img on the canvas
img.onload = function(){
// Update dimensions of the canvas with the dimensions of the image
mycanvas.width = this.width;
mycanvas.height = this.height;
// Draw the image
ctx.drawImage(img, 0, 0);
// Execute callback with the base64 URI of the image
if(typeof(callback) == "function"){
callback(mycanvas.toDataURL(
(imageFormat || "image/png")
));
}
};
// Crossbrowser support for URL
var URLObj = window.URL || window.webkitURL;
// Creates a DOMString containing a URL representing the object given in the parameter
// namely the original Blob
img.src = URLObj.createObjectURL(blob);
}
}
window.addEventListener("paste", function(e){
// Handle the event
retrieveImageFromClipboardAsBase64(e, function(imageDataBase64){
// If there's an image, open it in the browser as a new window :)
if(imageDataBase64){
// data:image/png;base64,iVBORw0KGgoAAAAN......
console.log(imageDataBase64);
}
});
}, false);
完整的html代码如下：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body>
...点击查看剩余70%
by thinkfuture
我知道答案，我要回答
私活外包
最新提问
为啥所有的照片分辨率提升工具都会修改照片上的图案细节？
js如何在浏览器中将webm视频的声音分离为单独音频？
微信小程序如何播放第三方域名url的mp4视频？
ai多模态大模型能实时识别视频中的手语为文字吗？
如何远程调试别人的chrome浏览器获取调试信息？
为啥js打开新网页window.open设置窗口宽高无效？
浏览器中js的navigator.mediaDevices.getDisplayMedia屏幕录像无法录制SpeechSynthesisUtterance产生的说话声音？
js中mediaRecorder如何录制window.speechSynthesis声音音频并下载？
python如何直接获取抖音短视频的音频文件url？
js在浏览器中如何使用MediaStream与MediaRecorder实现声音音频多轨道混流？
