Default checking a checkbox

Question

Is there a difference between these two ways of default checking a checkbox:

document.getElementById(checkboxId).defaultChecked = checked;

vs

document.getElementById(checkboxId).checked = checked;

Answer 1

defaultChecked is the default state, checked is the current state.

If you change defaultChecked and then press a <input type="reset"> then the checkbox should reset to the state specified in the defaultChecked property.

If you change checked, then the state will change immediately.