不是直接引用图像，而是将其粘贴在DIV中，如下所示:

Instead of referencing the image directly, stick it within a DIV, like the following:

<div class="placeholder">
    <div class="myimage" style="background-image: url({somedynamicimageurl})"><img /></div>
</div>

然后在您的CSS中:

.placeholder {
    width: 300;
    height: 300;
    background-repeat: no-repeat;
    background-size: contain;
    background-image: url('my_placeholder.png');
}