Open2b version 7.8

Show

The show instruction followed by an expression evaluates it and displays its result:

{% show 5 + 2 %}
{% show price %}
7
€ 29,99

A show instruction can also be written as follows:

{{ 5 + 2 }}
{{ price }}
7
€ 29,99

This second form is the most common because it is simpler to write and read, but you can use either form interchangeably.

Inside {%% and %%}, the show instruction can be used as follows:

{%%
  var value = 55
  if value < 100 {
      show value
  } else {
      show "too large"
  }
%%}
55

Version 7.0

{% show expr %}, where expr is a string literal, does not display the string but renders the file with the given path.

Therefore {% show "header.html" %} is equivalent to {{ render "header.html" }}. Its use is deprecated and it is preferable to use render.

The show instruction displays the evaluation of the expression differently based on the context where it is used:

{% var greeting = "hello" %}

<div>{{ greeting }}</div>

<script>
  var a = {{ greeting }};
  var b = '{{ greeting }} world';
</script><div>hello</div>

<script>
  var a = "hello";
  var b = 'hello world';
</script>