Home Web Front-end JS Tutorial How to solve the problem that setInterval() timer only executes once

How to solve the problem that setInterval() timer only executes once

Sep 12, 2017 am 09:41 AM
setinterval timer implement

Source code (wrong):

<body>
<span id="time"></span>
<script>
functions(){        
var t = new Date();    
var ti = document.getElementById("time").innerHTML;        
ti = t.getHours()+"时"+ t.getMinutes()+"分"+ t.getSeconds()+"秒";              
document.write(ti);          // window.setTimeout(s,1000);    
}    
window.setInterval("s()",1000);    window.onload(s());
</script>
</body>
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The console reports an error when executing:

Source code (after modification):

<body>
<span id="time"></span>
<script>functions(){
var t = new Date();document.getElementById("time").innerHTML=t.getHours()+"时"+ t.getMinutes()+"分"+ t.getSeconds()+"秒";
          // window.setTimeout(s,1000);    
          }    
          window.setInterval("s()",1000);    
          window.onload(s());
</script>
</body>
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