debug-element-before-it-gets-removed.js

var elementToCheck;
var DELAY = 200;

function checker() {
    elementToCheck = document.querySelector('#spoAppComponent');
    if(elementToCheck != null) {
        putBreakPoint();
        return;
    }
    // otherwise, keep listening
    setTimeout(checker, DELAY)
}

function putBreakPoint() {
    console.log('>>>>>> listening to breakpoint right now')
    var fnRemoveSelf = elementToCheck.remove;
    var fnRemoveParent = elementToCheck.parentElement.removeChild;
    elementToCheck.parentElement.removeChild = function() {
        debugger;
        return fnRemoveParent.apply(this, arguments);
    }
    elementToCheck.remove = function() {
        debugger;
        return fnRemoveSelf.apply(this, arguments);
    }
}

checker();