Preventing an image from being draggable or selectable without using JS

Set the following CSS properties to the image:

.selector {
    user-drag: none;
    -webkit-user-drag: none;
    user-select: none;
    -moz-user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
}

I've been forgetting to share my solution, I couldn't find a way to do this without using JS. There are some corner cases where @Jeffery A Wooden's suggested CSS just wont cover.

This is what I apply to all of my UI containers, no need to apply to each element since it recuses on all the child elements.

CSS:

.unselectable {
    /* For Opera and <= IE9, we need to add unselectable="on" attribute onto each element */
    /* Check this site for more details: http://help.dottoro.com/lhwdpnva.php */
    -moz-user-select: none; /* These user-select properties are inheritable, used to prevent text selection */
    -webkit-user-select: none;
    -ms-user-select: none; /* From IE10 only */
    user-select: none; /* Not valid CSS yet, as of July 2012 */

    -webkit-user-drag: none; /* Prevents dragging of images/divs etc */
    user-drag: none;
}

JS:

var makeUnselectable = function( $target ) {
    $target
        .addClass( 'unselectable' ) // All these attributes are inheritable
        .attr( 'unselectable', 'on' ) // For IE9 - This property is not inherited, needs to be placed onto everything
        .attr( 'draggable', 'false' ) // For moz and webkit, although Firefox 16 ignores this when -moz-user-select: none; is set, it's like these properties are mutually exclusive, seems to be a bug.
        .on( 'dragstart', function() { return false; } );  // Needed since Firefox 16 seems to ingore the 'draggable' attribute we just applied above when '-moz-user-select: none' is applied to the CSS 

    $target // Apply non-inheritable properties to the child elements
        .find( '*' )
        .attr( 'draggable', 'false' )
        .attr( 'unselectable', 'on' ); 
};

This was way more complicated than it needed to be.

You can use the pointer-events property in your CSS, and set it equal to 'none'

img {
    pointer-events: none;
}

Edited

this will block (click) event. So better solution would be

<img draggable="false" (dragstart)="false;" class="unselectable">

.unselectable {
  user-drag: none; 
  user-select: none;
  -moz-user-select: none;
  -webkit-user-drag: none;
  -webkit-user-select: none;
  -ms-user-select: none;
}

Depending on the situation, it is often helpful to make the image a background image of a div with CSS.

<div id='my-image'></div>

Then in CSS:

#my-image {
    background-image: url('/img/foo.png');
    width: ???px;
    height: ???px;
}

See this JSFiddle for a live example with a button and a different sizing option.