When working with conditional rendering in JSON-based UI frameworks one of the most frustrating errors to debug is:

INVALID_PROPERTY_VALUE: Property ‘condition’ should have valid expression syntax.

Quick Fix

Make sure the condition inside your If component is a valid boolean expression. The expression must include:

  • Proper opening and closing parentheses

  • Valid operands (e.g., ${data.value_1})

  • Valid operators (e.g., ==, !=, &&, ||)

  • Correct string formatting (with closing quotes if applicable)

What Causes This?

The error arises from broken or malformed logic inside the condition field of an If component. In the example below:

"condition": "))${data.value_1}(("

The syntax is totally invalid. There are extra parentheses, and the value is not part of any logical expression.

Common Triggers for INVALID_PROPERTY_VALUE

1. Missing parentheses

"condition": "${data.age > 18"  // Missing closing parenthesis

2. Unquoted strings

"condition": "${data.city} == Delhi"  // Delhi should be quoted

3. Wrong operator usage

"condition": "${data.status} || ${data.mode}"  // No boolean context

4. Type mismatch

​"condition": "${data.age} == 'eighteen'"  // Integer vs string​

5. Broken interpolation

"condition": "${data.value_1  && }"  // Missing second operand

Best Practice for Writing Conditions

A valid example might look like this:

"condition": "${data.value_1} == 'active' || ${data.count} > 5"

You can also wrap your logic in extra parentheses for clarity:

"condition": "(${data.value_1} == 'active') || (${data.count} > 5)"

For more troubleshooting insights related to WhatsApp Business API, check out heltar.com/blogs.