The position read-only property of the HTMLProgressElement interface returns current progress of the <progress> element.
For determinate progress bar returns the result of current value divided by max value, i.e., a fraction between 0.0 and 1.0.
For indeterminate progress bar the value is always -1.
Determinate Progress bar: <progress id="pBar"></progress> Position:
<span>0</span>const pBar = document.getElementById("pBar");
const span = document.getElementsByTagName("span")[0];
pBar.max = 100;
pBar.value = 0;
setInterval(() => {
pBar.value = pBar.value < pBar.max ? pBar.value + 1 : 0;
span.textContent = pBar.position;
}, 100);