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41 lines
1.2 KiB
41 lines
1.2 KiB
let startTime;
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let windowInterval;
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const padDigits = (value) => {
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if(value < 10){
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return '0'+value;
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} else {
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return value;
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}
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}
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const formatTime = (total) => {
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const hours = Math.floor(total/60/60);
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const minutes = Math.floor( (total - (hours*60*60)) / 60 );
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const seconds = total - minutes*60 - hours * 60 * 60;
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return `${padDigits(hours)}:${padDigits(minutes)}:${padDigits(seconds)}`;
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}
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const displayTime = () => {
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// console.log(Date.now()-startTime);
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const timeString = formatTime(Math.floor((Date.now()-startTime)/1000));
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document.querySelector('h1').innerHTML = timeString;
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}
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document.querySelector('.btn-primary').addEventListener('click', (event) => {
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startTime=Date.now();
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document.querySelector('.btn-primary').disabled=true;
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document.querySelector('.btn-secondary').disabled=false;
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windowInterval = window.setInterval(displayTime,1000)
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})
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document.querySelector('.btn-secondary').addEventListener('click', (event) => {
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document.querySelector('.btn-primary').disabled=false;
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document.querySelector('.btn-secondary').disabled=true;
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window.clearInterval(windowInterval)
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})
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// window.onbeforeunload = function(){
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// return 'Good bye';
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// }
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