jQuery.when: explore giving .then greater precedence over .promise #2709
Description
See discussion from this PR. Related to #2018.
We currently have
if ( resolveValues[ i ] &&
jQuery.isFunction( ( method = resolveValues[ i ].promise ) ) ) {
method.call( resolveValues[ i ] )
.progress( updateFunc( i, progressContexts, progressValues ) )
.done( updateFunc( i, resolveContexts, resolveValues ) )
.fail( master.reject );
} else if ( resolveValues[ i ] &&
jQuery.isFunction( ( method = resolveValues[ i ].then ) ) ) {
method.call(
resolveValues[ i ],
updateFunc( i, resolveContexts, resolveValues ),
master.reject,
updateFunc( i, progressContexts, progressValues )
);
}Putting .then before .promise breaks some stuff involving expected contexts and resolved values across multiple Deferreds, but handling Deferreds with .then might still be preferable.