但我想知道是否有更干净的方法来做到这一点。
是的，您可以拨打
blur()document.activeElementdocument.activeElement.blur()
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<script>
function onBlur(e) {
console.log("blur event", e.target);
}
function onSubmit(e) {
e.preventDefault();
document.activeElement.blur()
console.log('Submit', e.target)
}
</script>
</head>
<body>
<form onSubmit="onSubmit(event)">
<input name="code" />
<button>Submit</button>
</form>
</body>
</html>