What does res render do and what does the html file look like

Question

What does res render do  and what does the html file look like     My end goal is to load arbitrary comma-separated-values from a text file into an html file  for example   I was only able to deduce that a view was the html file  and callback gives that html file back   Here is the documentation  http   expressjs com api html res render   Now  given context from some example code I found  there is something about using ejs  embedded javascript  with  lt   and   gt     But if I may add  am I just incompetent or is the documentation really truly vague and assumes the reader knows everything  How could I have gone about figuring this out on my own  Is there any official documentation so I can gain a full understanding of usage  advantages and pitfalls     Edit 1   I just want to add that I m having a heck of a time learning node js   Is it me or is the general documentation really vague  Aside from lousy explanations like above  there are no type specifications for parameters or return values     Edit 2  Let me ask you some more specific questions above the code   The actual orders ejs file is in views orders ejs  How does this code refer to it   HTML excerpt    lt tbody gt     lt   for var i 0  i lt orders length  i       gt        lt tr gt          lt td gt  lt    orders i  id   gt  lt  td gt          lt td gt  lt    orders i  amount   gt  lt  td gt          lt td gt  lt    orders i  time   gt  lt  td gt        lt  tr gt        lt       gt    And the js  Please see  orders        Define routes for simple SSJS web app      Writes Coinbase orders to database  var async     require  async       express   require  express       fs        require  fs       http      require  http       https     require  https       db        require    models     var app   express    app set  views     dirname     views    app set  view engine    ejs    app set  port   process env PORT    8080       Render homepage  note trailing slash   example com  app get      function request  response      var data   fs readFileSync  index html   toString      response send data           Render example com orders app get   orders   function request  response      global db Order findAll   success function orders        var orders json           orders forEach function order          orders json push  id  order coinbase id  amount  order amount  time  order time                   Uses views orders ejs     response render  orders    orders  orders json         error function err        console log err       response send  error retrieving orders                  Hit this URL while on example com orders to refresh app get   refresh orders   function request  response      https get  https   coinbase com api v1 orders api key     process env COINBASE API KEY  function res        var body           res on  data   function chunk   body    chunk         res on  end   function           try           var orders json   JSON parse body           if  orders json error              response send orders json error             return                       add each order asynchronously         async forEach orders json orders  addOrder  function err              if  err                console log err               response send  error adding orders                else                  orders added successfully             response redirect   orders                                    catch  error            console log error           response send  error parsing json                         res on  error   function e          console log e         response send  error syncing orders                           sync the database and start the server db sequelize sync   complete function err      if  err        throw err      else       http createServer app  listen app get  port    function           console log  Listening on     app get  port                         add order to the database if it doesn t already exist var addOrder   function order obj  callback      var order   order obj order     order json from coinbase   if  order status     completed            only add completed orders     callback        else       var Order   global db Order         find if order has already been added to our database     Order find  where   coinbase id  order id    success function order instance          if  order instance               order already exists  do nothing         callback            else              build instance and save           var new order instance   Order build             coinbase id  order id            amount  order total btc cents   100000000     convert satoshis to BTC           time  order created at                       new order instance save   success function               callback               error function err              callback err

User · Answer

Renders a view and sends the rendered HTML string to the client.

res.render('index');

Or

res.render('index', function(err, html) {
  if(err) {...}
  res.send(html);
});

DOCS HERE: https://expressjs.com/en/api.html#res.render

User · Answer

What does res render do and what does the html file look like    res render   function compiles your template  please don t use ejs   inserts locals there  and creates html output out of those two things     Answering Edit 2 part      here you set that all templates are located in   views  directory app set  views     dirname     views        here you set that you re using  ejs  template engine  and the    default extension is  ejs  app set  view engine    ejs        here you render  orders  template response render  orders    orders  orders json      So  the template path is views   first part    orders  second part     ejs  third part      views orders ejs    Anyway  express js documentation is good for what it does  It is API reference  not a  how to use node js  book

[javascript] What does "res.render" do, and what does the html file look like?

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