var (Read form variable)

The $var function makes it possible to read the content of a previously Set variable in forms (e.g. in another element's behavior).

Hint: Form flags are also variables.

Tooltip

Syntax: $var(varName)

Parameter	Description
varName	The name of the variable.

Returns the value of the variable or null if it is not set or empty.

Syntax

$var(varName)

Parameter

Return value

The value of the variable or null if it is not set or empty.

Example

In the following example, in a behavior with every 'Change' (1) the content of the text field is written to a variable named 'content' (2).

When you click on the Read variable... button (3), a Calculate behavior is executed (4), which reads the variable 'content' and passes it to a Show alert action (5), which displays this value.

Result: