框什么意思？border:1px solid blue?
是说这种效果吗
https://developer.mozilla.org/en-US/docs/Web/CSS/-moz-force-broken-image-icon?redirectlocale=en-US&redirectslug=CSS%2F-moz-force-broken-image-icon
https://developer.mozilla.org/en-US/docs/Web/CSS/-moz-force-broken-image-icon?redirectlocale=en-US&redirectslug=CSS%2F-moz-force-broken-image-icon
嗯，果然可以
灰常感谢
