Iterating through every variable on the webpage using JavaScript

After successfully retrieving all JavaScript variables using the instructions provided in this topic, I decided to take it a step further. However, I encountered a challenge when trying to extract strings that were not declared as variables. For instance, while iterating through the code snippet below, I noticed that only the value of the variable hello was outputted and not the string "Passing My Message", which was not declared as a variable.

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<script>
function MyFunction(msg){
    alert('Message Passed : '+msg)
}
var hello = "AAA";
MyFunction("Passing My Message");

for (i in this){
    console.log(i + " : " + eval(i));
}
</script>

Now, my query is whether there is a method or technique that would allow me to obtain the string Passing My Message in the output.

Answer №1

It's unlikely that you'll come across the msg variable outside of the MyFunction function. This is because when you call MyFunction, it sets up the msg variable, but once the function is done executing, the msg variable is no longer accessible.

If you were to peek inside the MyFunction function while it's running, you might catch a glimpse of the msg variable. However, don't expect to find it hanging around outside of this specific function.

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