getAjaxReturn.js

function getAjaxResultAndReturnIt() {
    
    $.getJSON("/url", function(json){
        
        if(json.result) {
            return true; // will not bubble up as return of function call
        
        } else {
            return false; // will not bubble up as return of function call
        
        }
    
    });
    
}

function getContent() {
    
    var content = getAjaxResultAndReturnIt();

    // content = undefined
    
}