<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>ES7的async/await</title>
<style type="text/css">
</style>
</head>
<body>
<script type="text/javascript">
const sleep = (timeountMS) => new Promise((resolve) => {
setTimeout(resolve, timeountMS);
});
(async () => {
for (var i = 0; i < 5; i++) {
await sleep(1000);
console.log(new Date, i);
}
await sleep(1000);
console.log(new Date, i);
})();
var start = async function () {
console.log('start');
await sleep(3000);
console.log('end');
};
start();
</script>
</body>
</html>
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