版权声明: https://blog.csdn.net/caoyan0829/article/details/84977062
<img class="img-qr" src="https://123"/>
let qr = document.getElementsByClassName("img-qr")[0];
qr.src="data:image/png;base64," + data.imgSrc
//data.imgSrc 就是后台返给你的二进制了
<img class="img-qr" src="https://123"/>
let qr = document.getElementsByClassName("img-qr")[0];
qr.src="data:image/png;base64," + data.imgSrc
//data.imgSrc 就是后台返给你的二进制了