js中setInterval计时器停止

dmr

html:
<button onclick="myStopFunction()">停止时间</button>

js:
<script>
var myVar = setInterval(function(){ myTimer() }, 1000);

function myTimer() {
    var d = new Date();
    var t = d.toLocaleTimeString();
    document.getElementById("demo").innerHTML = t;
}

function myStopFunction() {
    clearInterval(myVar);
}
</script>

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