Use properties to set up your survey

Source code: Survey setup
Survey.defaultBootstrapCss.navigationButton = "btn btn-primary";
Survey.Survey.cssType = "bootstrap";
var survey = new Survey.Model({ 
    title: "Software developer survey.",
    pages: [
        { title: "What operating system do you use?",
            questions: [
                {type:"checkbox", name:"opSystem", title: "OS", hasOther: true, isRequired: true, 
                    choices:["Windows", "Linux", "Macintosh OSX"]}
        {   title: "What language(s) are you currently using?",
            questions: [
            {type:"checkbox", name:"langs",title:"Plese select from the list",
                 colCount: 4, isRequired: true,
                choices:["Javascript", "Java", "Python", "CSS", "PHP", "Ruby", "C++", "C", 
                    "Shell", "C#", "Objective-C", "R", "VimL", "Go", "Perl", "CoffeeScript", 
                    "TeX", "Swift", "Scala", "Emacs List", "Haskell", "Lua", "Clojure", 
                    "Matlab", "Arduino", "Makefile", "Groovy", "Puppet", "Rust", "PowerShell"]
        { title: "Please enter your name and e-mail",
            questions: [ 
            {type: "text", name: "name", title: "Name:"}, 
            {type: "text", name: "email", title: "Your e-mail"}]
survey.showProgressBar = "bottom";

function onAngularComponentInit() {
    Survey.SurveyNG.render("surveyElement", {model:survey});
var HelloApp =
            selector: 'ng-app',
            template: '<div id="surveyContainer" class="survey-container contentcontainer codecontainer">' +
            '<div id="surveyElement"></div></div>'
            constructor: function() {
            ngOnInit: function() {
document.addEventListener('DOMContentLoaded', function() {

Question required text: default is "* ".

survey.requiredText = yourValue; survey.render();

Show question numbers: default is 'on'. 'onPage' - set question numbers inside one page.

survey.showQuestionNumbers = yourValue; survey.render();

Show survey title: default is true.

survey.showTitle = yourValue; survey.render();

Show page titles: default is true.

survey.showPageTitles = yourValue; survey.render();

Show page numbers: default is false.

survey.showPageNumbers = yourValue; survey.render();

Show progress bar: (default is 'off')

survey.showProgressBar = yourvalue;

Show completed page: default is true. Set it to false to hide the Survey on pressing the 'Complete' button.

survey.showCompletedPage = yourValue; survey.render();

Html for completed page: If empty (default value), the built-in html is used.

survey.completedHtml = yourvalue;