Identify the specific element that activated the MutationObserver across multiple elements

After exploring a helpful Stack Overflow post, I discovered that it is feasible to monitor multiple elements using a single MutationObserver object. In order to track the text of two specific elements on a website, I crafted the following script:

var seconds = document.getElementsByClassName('sr-lmt-0-ms-countdown__time srt-primary-7 srm-large')[2];
var minutes = document.getElementsByClassName('sr-lmt-0-ms-countdown__time srt-primary-7 srm-large')[3];


var callback = function(mutations) {
    for (var mutation of mutations) {
            // do something
            // console.log(mutation + (minutes or seconds));
        }
    };

var observer = new MutationObserver(callback);
var config = {characterData: true, subtree: true};

observer.observe(minutes, config);
observer.observe(seconds, config);

To modify this script so that the Console clearly indicates which variable triggered the MutationObserver, what changes should I make?

Update:

Upon inspecting mutation.target, the output appears as shown in the following image:

https://i.stack.imgur.com/A1kPV.png

I am unable to differentiate whether sec or minutes caused the mutation. How can I enhance this distinction?

Answer №1

const observer = new MutationObserver(records => {
  console.log(records); // Output the mutations
});

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