如何使用 JavaScript 检查日期是否少于 1 小时前？

给定一个日期，任务是在 JavaScript 的帮助下检查给定日期是否小于 1 小时前。

方法一：

• 计算当前日期和 prev_date 之间差异的毫秒数。
• 如果在 1 小时内大于毫秒，则返回 false，否则返回 true。

示例：此示例实现了上述方法。

 
 
  
 
     
        How to check if date is less than
        1 hour ago using JavaScript ?
    
 
  
 
      
     
        GeeksForGeeks 
    
      
    
    
      
     
        click here
    
      
    
    
      
    
        var el_up = document.getElementById("GFG_UP");
        var el_down = document.getElementById("GFG_DOWN");
        var prev_date = new Date();
        var d = new Date();
      
        Date.prototype.addHours = function(h) { 
            this.setTime(this.getTime() + (h*60*60*1000)); 
            return this; 
        }
          
        prev_date.addHours(-2);
        el_up.innerHTML = "Click on the button to "
                + "check if the date is less than "
                + "1 hour ago.<br>Previous date = "
                + prev_date;
          
        function gfg_Run() {
              
            // Hour in milliseconds
            var ONE_HOUR = 60 * 60 * 1000;
              
            if ((d - prev_date) < ONE_HOUR) {
                el_down.innerHTML = "Date is less"
                            + " than 1 hour ago.";
            }
            else {
                el_down.innerHTML = "Date is not "
                        + "less than 1 hour ago.";
            }
        }         
     
 
  

输出：

• 在点击按钮之前：
  
• 点击按钮后：
  

方法二：

• 从当前时间减去 1 小时毫秒。
• 比较 current 和 prev_date 的毫秒数。
• 如果在 1 小时内大于毫秒，则返回 false，否则返回 true。

示例 2：此示例使用上述方法。

 
 
  
 
     
        How to check if date is less than
        1 hour ago using JavaScript ?
    
 
  
 
      
     
        GeeksForGeeks 
    
      
    
    
          
     
        click here
    
      
    
    
      
    
        var el_up = document.getElementById("GFG_UP");
        var el_down = document.getElementById("GFG_DOWN");
        var prev_date = new Date();
        var d = new Date();
          
        const check = (date) => {
            const HOUR = 1000 * 60 * 60;
            const anHourAgo = Date.now() - HOUR;
            return date > anHourAgo;
        }
        el_up.innerHTML = "Click on the button to check"
                    + " if the date is less than 1 hour"
                    + " ago.<br>Previous date = " + prev_date;
          
        function gfg_Run() {
            var c = check(prev_date);
              
            if (c) {
                el_down.innerHTML = "Date is less "
                            + "than 1 hour ago.";
            }
            else {
                el_down.innerHTML = "Date is not less"
                            + " than 1 hour ago.";
            }
        }         
     
 
  

输出：

• 在点击按钮之前：
  
• 点击按钮后：