QuickTip: Django and AngularJS Conflicting Interpolation Symbols

QuickTip: Django and AngularJS Conflicting Interpolation Symbols

When using the Django framework with the AngularJS MVC framework for building modern single page applications or SPAs, one of the issues you will encouter is related to both frameworks using the same symbols for template tags i.e { { and } }. So in this quick tip post we'll see how to change the interpolation symbols in AngularJS to avoid these conflicts.

Luckliy for us, AngularJS provides the $interpolateProvider provider which allows developers to customize the interpolation symbols which default to { { and } }.

Used for configuring the interpolation markup. Defaults to . This feature is sometimes used to mix different markup languages, e.g. to wrap an AngularJS template within a Python Jinja template (or any other template language). Mixing templating languages is very dangerous. The embedding template language will not safely escape AngularJS expressions, so any user-controlled values in the template will cause Cross Site Scripting (XSS) security bugs! -- https://docs.angularjs.org/api/ng/provider/$interpolateProvider

Simple AngularJS Example

Let's see a simple example:

Go ahead and create a base template ng-base.html file in your templates folder then add the following content

{ % load staticfiles % }
<!DOCTYPE html>
<html lang="en" ng-app='demoApp'>
    <base href="/">
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Integrate Angular 1.6.6 with Django</title>

<script src='https://ajax.googleapis.com/ajax/libs/angularjs/1.6.6/angular.min.js'></script>
 <script src='{ % static "js/app.js" % }' ></script>

    <div class='content'>
        { % block content % }{ % endblock content % }
    <div ng-controller="TestController as ctrl">
      {$ ctrl.mymodel $}

Next create js/app.js in your project's static folder and add the following code to create a new AngularJS app and inject $interpolateProvider in the config function.

'use strict';

var app = angular.module('demoApp', []);



app.controller('TestController', function() {
      this.mymodel = "I'm using the custom symbols";

So we have inject the interpolation provider $interpolateProvider then used two methods $interpolateProvider.startSymbol('{$'); and $interpolateProvider.endSymbol('$}'); to change the default sysmbols to custom ones.

Now you can use { { and } } for Django templates and {$ and $} for AngularJS templates.

✋If you have any questions about this article, ask them in our GitHub Discussions 👈 community. You can also Gitter

✋ Want to master Angular 14? Read our angular tutorial and join our #DailyAngularChallenge where we learn to build components, directives, services, pipes and complete web, mobile, and desktop applications with latest Angular version.

✋ Make sure to join our Angular 14 Dev Community 👈 to discuss anything related to Angular development.

❤️ Like our page and subscribe to our feed for updates!