角度5将图像转换为base64

Question

我将图像转换为base64时遇到问题，转换效果很好，但是当我尝试使用base64打开图像时，图像根本不出来，我不知道我遇到了什么问题。

<img id="imageid" src="http://localhost:8000/media/db.png" alt="">

getBase64Image() {
    var data = document.getElementById("imageid");
    html2canvas(data).then(canvas => {  
        var imgconverted = canvas.toDataURL("data:image/jpeg;base64"); 
        console.log(imgconverted, 'base64');
    });  
}

结果显示是正常的，但我在浏览器中将其打开，图像并不仅显示在一个帧上。

data:image/png;base64,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

不管有什么问题，希望您能为我提供帮助。

Answer 1

HTML2Canvas中当前存在图像错误： 链接到错误