In programming, anything that returns true
in a conditional is called truthy. Anything that returns false
in a conditional is called falsy. All object types can be described as either truthy or falsy.
Truthy
All values in Liquid are truthy except nil
and false
.
In the example below, the string “Tobi” is not a boolean, but it is truthy in a conditional:
Input
{% assign tobi = "Tobi" %}
{% if tobi %}
This condition will always be true.
{% endif %}
Strings, even when empty, are truthy. The example below will result in empty HTML tags if Donation.Message
is empty:
Input
{% if Donation.Message %} <h1>{{ Donation.Message }}</h1> {% endif %}
Output
<h1></h1>
Falsy
The falsy values in Liquid are nil
and false
.
Summary
The table below summarizes what is truthy or falsy in Liquid.
|
truthy
|
falsy
|
---|---|---|
true | • | |
false | • | |
nil | • | |
string | • | |
empty string | • | |
0 | • | |
integer | • | |
float | • | |
array | • | |
empty array | • | |
page | • | |
EmptyDrop | • |