How can I hide the broken image icon?
Example:

I have an image with error src:
Since 2005, Mozilla browsers such as Firefox have supported the non-standard :-moz-broken CSS pseudo-class that can accomplish exactly this request:
td {
min-width:64px; /* for display purposes so you can see the empty cell */
}
img[alt]:-moz-broken {
display:none;
}
img[alt]::before also works in Firefox 64 (though once upon a time it was img[alt]::after so this is not reliable). I can't get either of those to work in Chrome 71.