What is the best way to retrieve a value from within several functions?

Below is the code I have been working on:

(function() {
    var origOpen = XMLHttpRequest.prototype.open;
    XMLHttpRequest.prototype.open = function() {
        this.addEventListener('load', function() 
            console.log(this.responseText); //retrieve this value
        });
        origOpen.apply(this, arguments);
    };
})();

I am utilizing selenium's execute_script() to run the above code on the website. Is there a way for me to capture this.responseText and store it in a variable?

Appreciate any guidance.

Answer №1

When an XMLHttpRequest responds asynchronously, the value of <code>this.responseText
is obtained.

If you want to execute code once the XMLHttpRequest has finished, you can pass it as a callback function or call it directly within the event. Inside that callback, you can redirect the flow of the application.

For example, using a direct approach (without altering your original code):

function oCallback(responseText){
    console.log('Execution continues');
    console.log(responseText);
}

(function() {
    var origOpen = XMLHttpRequest.prototype.open;
    XMLHttpRequest.prototype.open = function() {
        this.addEventListener('load', function() 
            //console.log(this.responseText); //return this value
            oCallback(this.responseText);
        });
        origOpen.apply(this, arguments);
    };
})();

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