---
schema_version: "1"
id: 660eeb9bd951f3eb48222f4ae43c49962f884b3c87e67b5afc830c3c607f5969
title: isif Element
collection: developer
version: current
locale: en-us
portal_url: https://docs.salesforce.com/developer/current/en-us/commerce-cloud/b2c-commerce/guides/isml/b2c-isif.md
canonical_url: https://developer.salesforce.com/docs/commerce/pwa-kit-managed-runtime/guide/b2c-isif.html
source_site: developer.salesforce.com
content_type: documentation
content_hash: e9e4491bd1373a90dca724e65aef2ba2e335eb94c5de4151e74557f0e32598d2
products:
- Composable Storefront
- Salesforce APIs
---
# isif Element
Create conditional template code and control the flow of business logic.
## Syntax
```
...
//0 or more
...
...
```
- condition = if_expression
- : _Allowed data type:_ string or expression.
`if_expression` evaluates to a boolean value. If the `` condition is true, the system executes the code immediately following the `` tag, ignoring the enclosed `` and `` tags. If the `` condition is false, the system ignores the code immediately following the `` tag, and then tests each `` condition in order. When the system finds a true `` condition, the system executes the code immediately following the `` tag and ignores any remaining `` and `` tags. If all `` conditions are false, the system executes the code following the `` tag.
## Purpose
The `` tag group lets you create conditional programming constructs using custom tags.
## Supporting Tags
`` and its supporting tags, `` and ``, are some of the most commonly used tags. They contain no business logic, just the conditional visualization of data.
## Rules of Use
Every `` tag must have a matching `` tag. You can use any Salesforce B2C Commerce script expression as a condition for the `` tag. In particular, you can use local variables, Pipeline Dictionary variables and any functions within those expressions.
`` and `` are optional. You can use as many `` tags as needed in an `` statement, but you can only use one ``, which must always be the last tag within an `` group.
## Example
A conditional expression should typically return a boolean which is interpreted appropriately. If condition expression evaluates to non boolean and is not null, it's interpreted as true. When it evaluates to null it's interpreted as false.
```
Special free gift.
Special deal.
Today's low price.
```
This example shows how to toggle continuously between three different colors for the rows of a table. The current color is stored in the user-defined variable, color.
```
```