Print DOM elements, dimensions, React ID's

gistfile1.txt

console.clear();
var all = document.getElementsByTagName("*");
var TAGS_TO_SKIP=['BODY','HEAD','HTML','IFRAME','LABEL','LINK','NOSCRIPT','SCRIPT','STYLE','TITLE'];

for (var i=0, max=all.length; i < max; i++) {
     var el=all[i];
     if (TAGS_TO_SKIP.indexOf(el.tagName) == -1 ) {
       // var reactID=el.dataset.reactid; // You might want to do something with this..
       console.log(i, el.tagName,el,  el.getBoundingClientRect());
     }
}

//--- As a bookmarklet:
javascript:(function(){ var all,TAGS_TO_SKIP,i,max,el;for(console.clear(),all=document.getElementsByTagName("*"),TAGS_TO_SKIP=["BODY","HEAD","HTML","IFRAME","LABEL","LINK","NOSCRIPT","SCRIPT","STYLE","TITLE"],i=0,max=all.length;max>i;i++)el=all[i],-1==TAGS_TO_SKIP.indexOf(el.tagName)&&console.log(i,el.tagName,el,el.getBoundingClientRect()) })();