非常教程

JavaScript参考手册

错误 | Errors

Errors: Precision range

信息

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

哪里出错了?

其中一种方法有一个超出范围的精度参数:

  • Number.prototype.toExponential()
  • Number.prototype.toFixed()
  • Number.prototype.toPrecision()

这些方法的允许范围通常在0到20(或21)之间。ECMAScript规范允许扩展这个范围。

Method

Firefox (SpiderMonkey)

Chrome, Opera (V8)

Number.prototype.toExponential()

0 to 100

0 to 20

Number.prototype.toFixed()

-20 to 100

0 to 20

Number.prototype.toPrecision()

1 to 100

1 to 21

示例

无效的情况

77.1234.toExponential(-1);  // RangeError
77.1234.toExponential(101); // RangeError

2.34.toFixed(-100);         // RangeError 
2.34.toFixed(1001);         // RangeError 

1234.5.toPrecision(-1);     // RangeError
1234.5.toPrecision(101);    // RangeError

有效的情况

77.1234.toExponential(4); // 7.7123e+1
77.1234.toExponential(2); // 7.71e+1

2.34.toFixed(1); // 2.3
2.35.toFixed(1); // 2.4 (note that it rounds up in this case)

5.123456.toPrecision(5); // 5.1235
5.123456.toPrecision(2); // 5.1
5.123456.toPrecision(1); // 5

错误 | Errors相关

1.Error
2.error.message
3.error.name
4.Error.prototype
5.error.toString
6.Errors
7.Errors: Already has pragma
8.Errors: Array sort argument
9.Errors: Bad octal
10.Errors: Bad radix
11.Errors: Bad regexp flag
12.Errors: Bad return or yield
13.Errors: Called on incompatible type
14.Errors: Cant access lexical declaration before init
15.Errors: Cant define property object not extensible
16.Errors: Cant delete
17.Errors: Cant redefine property
18.Errors: Cyclic object value
19.Errors: Dead object
20.Errors: Delete in strict mode
21.Errors: Deprecated caller or arguments usage
22.Errors: Deprecated expression closures
23.Errors: Deprecated octal
24.Errors: Deprecated source map pragma
25.Errors: Deprecated String generics
26.Errors: Deprecated toLocaleFormat
27.Errors: Equal as assign
28.Errors: For-each-in loops are deprecated
29.Errors: Getter only
30.Errors: Identifier after number
31.Errors: Illegal character
32.Errors: in operator no object
33.Errors: Invalid array length
34.Errors: Invalid assignment left-hand side
35.Errors: Invalid const assignment
36.Errors: Invalid date
37.Errors: Invalid for-in initializer
38.Errors: Invalid for-of initializer
39.Errors: JSON bad parse
40.Errors: Malformed formal parameter
41.Errors: Malformed URI
42.Errors: Missing bracket after list
43.Errors: Missing colon after property id
44.Errors: Missing curly after function body
45.Errors: Missing curly after property list
46.Errors: Missing formal parameter
47.Errors: Missing initializer in const
48.Errors: Missing name after dot operator
49.Errors: Missing parenthesis after argument list
50.Errors: Missing parenthesis after condition
51.Errors: Missing semicolon before statement
52.Errors: More arguments needed
53.Errors: Negative repetition count
54.Errors: No non-null object
55.Errors: No properties
56.Errors: No variable name
57.Errors: Non configurable array element
58.Errors: Not a codepoint
59.Errors: Not a constructor
60.Errors: Not a function
61.Errors: Not defined
62.Errors: Property access denied
63.Errors: Read-only
64.Errors: Redeclared parameter
65.Errors: Reserved identifier
66.Errors: Resulting string too large
67.Errors: Stmt after return
68.Errors: Strict Non Simple Params
69.Errors: Too much recursion
70.Errors: Typed array invalid arguments
71.Errors: Undeclared var
72.Errors: Undefined prop
73.Errors: Unexpected token
74.Errors: Unexpected type
75.Errors: Unnamed function statement
76.Errors: Unterminated string literal
77.Errors: Var hides argument
78.EvalError
79.EvalError.prototype
80.RangeError
81.RangeError.prototype
82.ReferenceError
83.ReferenceError.prototype
84.SyntaxError
85.SyntaxError.prototype
86.TypeError
87.TypeError.prototype
88.URIError
89.URIError.prototype
JavaScript

JavaScript 是一种高级编程语言,通过解释执行,是一门动态类型,面向对象(基于原型)的解释型语言。它已经由ECMA(欧洲电脑制造商协会)通过 ECMAScript 实现语言的标准化。它被世界上的绝大多数网站所使用,也被世界主流浏览器( Chrome、IE、FireFox、Safari、Opera )支持。JavaScript 是一门基于原型、函数先行的语言,是一门多范式的语言,它支持面向对象编程,命令式编程,以及函数式编程。它提供语法来操控文本、数组、日期以及正则表达式等,不支持 I/O,比如网络