非同期関数を同期関数っぽく呼び出す(async/await)
<apex:page >
<html>
<head>
</head>
<body>
<script type="text/javascript">
function aFunc2(data) {
return new Promise(function(callback) {
setTimeout(function() {
callback(data * 2);
}, Math.random() * 1000);
});
}
async function sample_async_await() {
var val = 100;
val = await aFunc2(val);
console.log(val); // 200
val = await aFunc2(val);
console.log(val); // 400
val = await aFunc2(val);
console.log(val); // 800
}
sample_async_await();
</script>
</body>
</html>
</apex:page>結果
