Postman: How to delete/clear postman environment variable at run-time

Question

Is there any way to delete/clear postman environment variable using functions at runtime. I could possibly set to blank or some special value but is there a general way of doing things.

Answer 1

Ok - so this does it.

postman.clearEnvironmentVariable("key");

Answer 2

And the right one syntax is:

pm.environment.unset("key");

Answer 3

I'v also come across this possible solution for setting the variables to blank: https://community.postman.com/t/can-i-clear-just-the-current-values-in-an-environment/6176

I have found that using the pm.environment.clear() or pm.environment.unset(variableName) deletes the variable from the environment. But sometimes I want to keep the variable and just clear the value, e.g. I want to share the environment with someone else but it contains values which should only apply to myself (such as oauth credentials).

So I re-used the function described in the link and use a pm.environment.set(variableName, "") instead of an unset.

So my function looks like:

function clearVariables() {
    // Get all the names of our env variables and put them in an array
    const environmentVariables = pm.environment.values.map(function(variable) {
        return variable.key;
    });

    // Filter through the above array but don't add variables as per conditions    
    const binTheseVariablesOff = environmentVariables.filter(function(variable) {        
        return !variable.toLowerCase().includes("auth");
    });

    // Now go through this new array and clear these env variables
    return binTheseVariablesOff.forEach(function(variableName) {        
        pm.environment.set(variableName, "");
    });
}

// Call the function
clearVariables();