scratch – Rev 125

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define(function() {

function addGetHookIf( conditionFn, hookFn ) {
        // Define the hook, we'll check on the first run if it's really needed.
        return {
                get: function() {
                        if ( conditionFn() ) {
                                // Hook not needed (or it's not possible to use it due
                                // to missing dependency), remove it.
                                delete this.get;
                                return;
                        }

                        // Hook needed; redefine it so that the support test is not executed again.
                        return (this.get = hookFn).apply( this, arguments );
                }
        };
}

return addGetHookIf;

});