2. JavaScript variables resolution

In most cases you'll need to resolve a JavaScript variable value.

For example the following expression resolves a value of a hosts JavaScript variable:
If this variable is not declared in JavaScript file you are querying you will get an undefined value.

The ${} nexl expression is always equal to undefined value because it doesn't contain any JavaScript variable name to resolve.

Variable name can be provided dynamically. Let's consider the following code snippet:
X = 'myVar';
myVar = 79;
The following expression first resolves a 'myVar' string value and then resolves a value of myVar variable:

Watch a demo