default

Sets a default value for any variable with no assigned value. default will show its value if the input is nil, false, or empty.

In the following examples with a variable product_price:

• When it’s not defined, the default value is used.
• When it’s defined, the default value is not used.
• When it’s empty, so the default value is used.

Input

{{ product_price | default: 2.99 }}
{% assign product_price = 4.99 %} {{ product_price | default: 2.99 }}
{% assign product_price = "" %} {{ product_price | default: 2.99 }}

Output

2.99
4.99
2.99

Allowing false

To allow variables to return false instead of the default value, you can use the allow_false parameter.

Input

{% assign display_price = false %}
{{ display_price | default: true, allow_false: true }}

Output

false