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Let’s look directly at the example code:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
//返回时间格式：年-月-日 时:分:秒
function getDateString(date) {
// 获取传入的时间，若没有传值则取当前时间
var dateStr = date || new Date();
// 获取时间的年月日
var year = dateStr.getFullYear().toString().padStart(4, "0");
var month = (dateStr.getMonth() + 1).toString().padStart(2, "0");
var day = dateStr.getDate().toString().padStart(2, "0");
// 获取时间的时分秒
var hour = dateStr.getHours().toString().padStart(2, "0");
var minute = dateStr.getMinutes().toString().padStart(2, "0");
var second = dateStr.getSeconds().toString().padStart(2, "0");
//返回时间格式：年-月-日 时:分:秒
return `${year}-${month}-${day} ${hour}:${minute}:${second}`;
}
console.log(getDateString());
</script>
</body>
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