let output; function init() { output = document.querySelector("input"); output.value = ""; } function doit() { debugger; stepIntoMe(); // step in output.value = "dbg continue"; debugger; } function stepIntoMe() { output.value = "step in"; // step in stepOverMe(); // step over let x = 0; // step out output.value = "step out"; } function stepOverMe() { output.value = "step over"; }