Merge branch '4.4' into 5.0

* 4.4:
  Add twig vue js tip

frontend/encore/vuejs.rst

@@ -185,6 +185,22 @@ you can import them with ``require()`` function:
  }
  }
 
+Using Vue inside Twig templates
+-------------------------------
+
+Twig templates can instantiate a Vue.js app in the same way as any other
+JavaScript code. However, given that both Twig and Vue.js use the same delimiters
+for variables, you should configure the ``delimiters`` Vue.js option to change
+the default variable delimiters.
+
+If you set for example ``delimiters: ['${', '}$']``, then you can use the
+following in your Twig templates:
+
+ .. code-block:: twig
+
+ {{ twig_variable }} {# renders a Twig variable #}
+ ${ vuejs_variable }$ {# renders a Vue.js variable #}
+
 .. _`Vue.js`: https://vuejs.org/
 .. _`vue-loader options`: https://vue-loader.vuejs.org/options.html
 .. _`Encore's index.js file`: https://github.com/symfony/webpack-encore/blob/master/index.js