JavaScript RangeError – 无效的数组长度

此 JavaScript 异常Invalid array length在创建数组长度为负或大于或等于 2 ³²的 Array 或 ArrayBuffer 时发生。如果手动将 length 属性设置为负值或大于等于2 ³² .

信息：

RangeError: Array length must be a finite positive integer (Edge)
RangeError: invalid array length (Firefox)
RangeError: Invalid array length (Chrome)
RangeError: Invalid array buffer length (Chrome)

错误类型：

RangeError

错误原因： Array 或 ArrayBuffer 的长度只能用无符号的 32 位整数表示，它只存储 0 到 2 ³² -1 范围内的值。创建 Array 或 ArrayBuffer 时，如果数组长度为负数或大于或等于 2 ³² ，则会发生此错误。

示例 1：在本示例中，length 属性设置为 6，这是一个有效值，因此没有发生错误。

HTML

    
        
        
    
    
        
            GeeksforGeeks
        
  
        
            JavaScript RangeError 
            Invalid array length
        
  
        
            click here
        
        
  
        
            var el_down = document.getElementById("GFG_DOWN");
            function Geeks() {
                try {
                    let a = [];
                    a.length = 6;
                    el_down.innerHTML = 
                      "'Invalid array length' "+
                      "error has not occurred";
                } catch (e) {
                    
                    // Show the error in console
                    console.log(e);
                    el_down.innerHTML = 
                      "'Invalid array length' "+
                      "error has occurred";
                }
            }
        
    

输出：

示例 2：在本示例中，length 属性设置为 -1，这是一个无效值，因此发生了错误。

HTML

    
        
        
    
    
        
            GeeksforGeeks
        
  
        
            JavaScript RangeError 
            Invalid array length
        
  
        
            click here
        
        
  
        
            var el_down = document.getElementById("GFG_DOWN");
            function Geeks() {
                try {
                    let a = [];
                    a.length = -1;
                    el_down.innerHTML = 
                      "'Invalid array length' "+
                      "error has not occurred";
                } catch (e) {
                    
                    // Show the error in console
                    console.log(e);
                    el_down.innerHTML = 
                      "'Invalid array length' "+
                      "error has occurred";
                }
            }
        
    

输出：