JavaScript RangeError |精度超出范围

如果将超出 0 和 20（或 21）范围的数字传递给 toFixed()、toPrecision() 或 toExponential() 方法，则会发生此 JavaScript 异常精度超出范围。

错误信息：

RangeError: The number of fractional digits is out of range (Edge)
RangeError: The precision is out of range (Edge)
RangeError: precision {0} out of range (Firefox)
RangeError: toExponential() argument must be between 0 and 20 (Chrome)
RangeError: toFixed() digits argument must be between 0 and 20 (Chrome)
RangeError: toPrecision() argument must be between 1 and 21 (Chrome)

错误类型：

RangeError

发生了什么？

在 toExponential()、toFixed() 和 toPrecision() 方法之一中有一个精度参数超出范围。

示例 1：在此示例中，RangeError 发生为 -100 到 toFixed() 被传递。

HTML

  

    
    

  

    
        GeeksForGeeks
    
  
    
        JavaScript RangeError | Precision is out of range
    
  
    
        click here
    
  
    
  
    
        var el_down = document.getElementById("GFG_DOWN");
        function Geeks() {
            try {
                3.54.toFixed(-100);
                el_down.innerHTML = "'Precision out of range'"
                        + " error has not occurred";
            } catch (e) {
                el_down.innerHTML = "'Precision out of range'"
                        + " error has occurred";
            }
        } 
    

  

输出：

示例 2：在此示例中，传递给 toExponential() 的参数为 -4，因此发生了 RangeError。

HTML

  

    
    

  

    
        GeeksForGeeks
    
  
    
        JavaScript RangeError | 
        Precision is out of range
    
  
    
        click here
    
    
    
  
    
        var el_down = document.getElementById("GFG_DOWN");
        function Geeks() {
            try {
                77.1234.toExponential(-4);
                el_down.innerHTML = "'Precision out of range'"
                        + " error has not occurred";
            } catch (e) {
                el_down.innerHTML = "'Precision out of range'"
                        + " error has occurred";
            }
        } 
    

  

输出：

示例 3：在此示例中，RangeError 发生为 -1 到 toPrecision() 被传递。

HTML

  

    
    

  

    
        GeeksForGeeks
    
  
    
        JavaScript RangeError | 
        Precision is out of range
    
  
    
        click here
    
    
    
  
    
        var el_down = document.getElementById("GFG_DOWN");
        function Geeks() {
            try {
                5643.9.toPrecision(-1);
                el_down.innerHTML = "'Precision out of range'"
                        + " error has not occurred";
            } catch (e) {
                el_down.innerHTML = "'Precision out of range'"
                        + " error has occurred";
            }
        } 
    

  

输出：