JavaScript timer instance js setTimeout implement timer

JavaScript timer instance js setTimeout implement timer

For example, setTimeout implements a simple timer. Script Var c = 0; Var t; Var timer_is_on = 0; // Js timer code Function timedCount () { Document. getElementById ('txt '). value = c; C = c + 1; T = setTimeout ("timedCount ()", 1000 ); } Function doTimer () { If (! Timer_is_on) { Timer_is_on = 1; TimedCount (); } } Script Click on the button above. The input field will count forever, starting at 0.