js 时间戳转换成几分钟前，几小时前，几天前

formatMsgTime (timespan) { var dateTime = new Date(timespan); var year = dateTime.getFullYear();
var month = dateTime.getMonth() + 1;
var day = dateTime.getDate();
var hour = dateTime.getHours();
var minute = dateTime.getMinutes();
var second = dateTime.getSeconds();
var now = new Date();
var now_new = Date.parse(now.toDateString()); //typescript转换写法 var milliseconds = 0;
var timeSpanStr; milliseconds = now_new - timespan; if (milliseconds <= 1000 * 60 * 1) {
timeSpanStr = '刚刚';
}
else if (1000 * 60 * 1 < milliseconds && milliseconds <= 1000 * 60 * 60) {
timeSpanStr = Math.round((milliseconds / (1000 * 60))) + '分钟前';
}
else if (1000 * 60 * 60 * 1 < milliseconds && milliseconds <= 1000 * 60 * 60 * 24) {
timeSpanStr = Math.round(milliseconds / (1000 * 60 * 60)) + '小时前';
}
else if (1000 * 60 * 60 * 24 < milliseconds && milliseconds <= 1000 * 60 * 60 * 24 * 15) {
timeSpanStr = Math.round(milliseconds / (1000 * 60 * 60 * 24)) + '天前';
}
else if (milliseconds > 1000 * 60 * 60 * 24 * 15 && year == now.getFullYear()) {
timeSpanStr = month + '-' + day + ' ' + hour + ':' + minute;
} else {
timeSpanStr = year + '-' + month + '-' + day + ' ' + hour + ':' + minute;
}
return timeSpanStr;
};