What is the use of the script mentioned?

问题

working on the sample meanjs application. I am not able to understand the below code snippet. Kindly explain the use of this script in layout.server.view.html view.

<!--Embedding The User Object-->
      <script type="text/javascript">
        var user = {{ user | json | safe }};
      </script>

回答1:

Basically user is being sent via express/swig everytime a request is made to the route /* (see here) so that user data can be used by AngularJS.

If you check the file core.server.controller.js (here), you will see that MEAN.JS passes a user object in the response in this code block:

res.render('modules/core/server/views/index', {
    user: safeUserObject
});

Then in the code block you mentioned, you're assigning user object sent by express/swig to the variable user which can then be accessed later using $window.user similarly to what is done here.

json and safe are two swig filters. The first one returns a string representation of a JavaScript object and the second one forces the input to not be auto-escaped.

来源：https://stackoverflow.com/questions/37519300/what-is-the-use-of-the-script-mentioned