How do i convert From a base64 string to Image using Javascript

Question

我现在有一个 base64 字符串，我想将该 base64 字符串转换为 Image，有什么想法可以做吗？

Answer 1

Try this

<img id="img"></img>
string base64="";
img.setAttribute('src', "data:image/jpg;base64," + base64);

Answer 2

Your html can handle the base64 as long as you have 'data:image/png;base64,' as part of the img src. Sample below.

<img src="data:image/png;base64, base64goeshere" alt="blah" />

Answer 3

只需在 base64 字符串之前附加data:image/png;base64,并将其添加到图像的 src 中。

 <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAJYAAACWBAMAAADOL2zRAAAAG1BMVEXMzMyWlpaqqqq3t7fFxcW+vr6xsbGjo6OcnJyLKnDGAAAACXBIWXMAAA7EAAAOxAGVKw4bAAABAElEQVRoge3SMW+DMBiE4YsxJqMJtHOTITPeOsLQnaodGImEUMZEkZhRUqn92f0MaTubtfeMh/QGHANEREREREREREREtIJJ0xbH299kp8l8FaGtLdTQ19HjofxZlJ0m1+eBKZcikd9PWtXC5DoDotRO04B9YOvFIXmXLy2jEbiqE6Df7DTleA5socLqvEFVxtJyrpZFWz/pHM2CVte0lS8g2eDe6prOyqPglhzROL+Xye4tmT4WvRcQ2/m81p+/rdguOi8Hc5L/8Qk4vhZzy08DduGt9eVQyP2qoTM1zi0/uf4hvBWf5c77e69Gf798y08L7j0RERERERERERH9P99ZpSVRivB/rgAAAABJRU5ErkJggg==" alt="">

Answer 4

Please use the below function and pass base64 as dataurl and name of file as filename in the below function.

function dataURLtoFile(dataurl, filename) {
    var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
        bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
    while (n--) {
        u8arr[n] = bstr.charCodeAt(n);
    }
    return new File([u8arr], filename, { type: mime });
}