## 前言 通过本文你将了解js中常见的错误类型，并且希望你能熟悉了解他们。 ## 常见格式错误枚举 “Missing semicolon.” : “缺少分号.”, “Use the function form of \”use strict\”.” : “使用标准化定义function.”, “Unexpected space after ‘-’.” : “在’-'后面不应出现空格.”, “Expected a JSON value.” : “请传入一个json的值.”, “Mixed spaces and tabs.”: “空格和TAB重复.”, “Unsafe character.” : “不安全的字符.”, “Line too long.”: “本行中的字符超过设定的最大长度.”, “Trailing whitespace.”: “本行末尾有过多无用空格.”, “Script URL.” : “脚本URL.”, “Unexpected {a} in ‘{b}’.” : “在 ‘{b}’ 中不该出现 {a}.”, “Unexpected ‘{a}’.” : “不该在此出现’{a}’.”, “Strings must use doublequote.” : “字符串需要用双引号”, “Unnecessary escapement.” : “不需要转义”, “Control character in string: {a}.” : “在字符串中出现了Control的字符”, “Avoid \\’.” : “避免 \\”, “Avoid \\v.” : “避免 \\v”, “Avoid \\x-.” : “避免 \\x-”, “Bad escapement.” : “错误的转义字符”, “Bad number ‘{a}’.” : “错误的数字 ‘{a}’”, “Missing space after ‘{a}’.” : “在’{a}’之后缺少空格”, “Don’t use extra leading zeros ‘{a}’.” : “不要再’{a}’的前面用多余的0″, “Avoid 0x-. ‘{a}’.” : “避免使用 0x-. ‘{a}’.”, “A trailing decimal point can be confused with a dot ‘{a}’.” : “在’{a}’中使用点尾随小数点”, “Unexpected comment.” : “不该在此处出现注释”, “Unescaped ‘{a}’.” : “没有转义 ‘{a}’”, “Unexpected control character in regular expression.” : “在正则表达式中出现了control字符”, “Unexpected escaped character ‘{a}’ in regular expression.” : “在正则表达式中出现了没有转义的字符 ‘{a}’”, “Expected ‘{a}’ and instead saw ‘{b}’.” : “应该用 ‘{a}’代替’{b}’”, “Spaces are hard to count. Use {{a}}.” : “空格难以统计，请使用 {{a}}”, “Insecure ‘{a}’.” : “不安全的 ‘{a}’”, “Empty class.” : “空的class”, “Expected a number and instead saw ‘{a}’.”:“应该用数字代替’{a}’”, “‘{a}’ should not be greater than ‘{b}’.”:“‘{a}’不应该比’{b}’大”, “‘hasOwnProperty’ is a really bad name.”: “‘hasOwnProperty’是关键字”, “‘{a}’ was used before it was defined.”:“‘{a}’未定义就已经使用了.”, “‘{a}’ is already defined.”:“‘{a}’被重复定义”, “A dot following a number can be confused with a decimal point.”:“数字后面的一个点会被误认为是十进制的小数点”, “Confusing minusses” : “容易混淆的负数表达-”, “Confusing plusses.” : “容易混淆的正数表达+”, “Unmatched ‘{a}’.” : “无法匹配的’{a}’”, “Expected ‘{a}’ to match ‘{b}’ from line {c} and instead saw ‘{d}’.”:“在行{c}中需要用’{a}’和’{b}’匹配，用来代替’{d}’”, “Unexpected early end of program.”:“程序不可预期的提前终止”, “A leading decimal point can be confused with a dot: ‘.{a}’.”:“‘{a}’前的点容易混淆成小数点”, “Use the array literal notation [].”:“使用数组的符号 []“, “Expected an operator and instead saw ‘{a}’.”:“需要用一个符号来代替’{a}’”, “Unexpected space after ‘{a}’.”:“在’{a}’之后不能出现空格”, “Unexpected space before ‘{a}’.”:“在’{a}’之前不能出现空格”, “Bad line breaking before ‘{a}’.”:“在’{a}’之前错误的换行”, “Expected ‘{a}’ to have an indentation at {b} instead at {c}.”:“‘{a}’需要在{c}而不是{b}处缩进”, “Line breaking error ‘{a}’.”:“换行错误 ‘{a}’”, “Unexpected use of ‘{a}’.”:“此处不能用’{a}’”, “Bad operand.”:“错误的操作数”, “Use the isNaN function to compare with NaN.”:“使用isNaN来与NaN比较”, “Confusing use of ‘{a}’.”:“容易混淆的’{a}’的使用”, “Read only.”:“只读的属性”, “‘{a}’ is a function.”:“‘{a}’是一个函数”, ‘Bad assignment.’:“错误的赋值”, “Do not assign to the exception parameter.”:“不要给额外的参数赋值”, “Expected an identifier in an assignment and instead saw a function invocation.”:“在赋值的语句中需要有一个标识符，而不是一个方法的调用”, “Expected an identifier and instead saw ‘{a}’ (a reserved word).”:“需要有一个标识符，而不是’{a}’(保留字符)”, “Missing name in function declaration.”:“在方法声明中缺少名称”, “Expected an identifier and instead saw ‘{a}’.”:“需要有一个标识符，而不是’{a}’”, “Inner functions should be listed at the top of the outer function.”:“内部函数的声明应该放在此函数的顶部。”, “Unreachable ‘{a}’ after ‘{b}’.”:“在’{b}’之后无法获取’{a}’”, “Unnecessary semicolon.”:“不必要的分号”, “Label ‘{a}’ on {b} statement.”:“将’{a}’放在{b}的声明中”, “Label ‘{a}’ looks like a javascript url.”:“‘{a}’看上去像一个js的链接”, “Expected an assignment or function call and instead saw an expression”:“需要一个赋值或者一个函数调用，而不是一个表达式.”, “Do not use ‘new’ for side effects.”:“不要用’new’语句.”, “Unnecessary \”use strict\”.”:“不必要的\”use strict\”.”, “Missing \”use strict\” statement.”:“缺少\”use strict\”的声明”, “Empty block.”:“空的模块”, “Unexpected /*member ‘{a}’.”:“不应出现 /*元素 ‘{a}’.”, “‘{a}’ is a statement label.”:“‘{a}’是一个声明”, “‘{a}’ used out of scope.”:“‘{a}’使用超出范围”, “‘{a}’ is not allowed.”:“不允许使用’{a}’”, “‘{a}’ is not defined.”:“‘{a}’没有被定义”, “Use ‘{a}’ to compare with ‘{b}’.”:“使用’{a}’与’{b}’相比”, “Variables should not be deleted.”:“变量需要被删除”, “Use the object literal notation {}.”:“使用对象的文字符号 {}”, “Do not use {a} as a constructor.”:“不要使用{a}作为一个构造对象”, “The Function constructor is eval.”:“The Function constructor is eval.”, “A constructor name should start with an uppercase letter.”:“一个构造对象的名称必须用大写字母开头.”, “Bad constructor.”:“错误的构造对象”, “Weird construction. Delete ‘new’.”:“构造对象有误，请删除’new’”, “Missing ‘()’ invoking a constructor.”:“缺少括号()”, “Avoid arguments.{a}.”:“避免参数.{a}.”, “document.write can be a form of eval.”:“document.write是eval的一种形式”, ‘eval is evil.’:“尽量不要使用eval”, “Math is not a function.”:“Math不是一个函数”, “Missing ‘new’ prefix when invoking a constructor.”:“此处缺少了’new’”, “Missing radix parameter.”:“缺少参数”, “Implied eval is evil. Pass a function instead of a string.”:“传递一个函数，而不是一个字符串”, “Bad invocation.”:“错误的调用”, “['{a}'] is better written in dot notation.”:“['{a}']最好用点.的方式”, “Extra comma.”:“多余的逗号”, “Don’t make functions within a loop.”:“不要用循环的方式创建函数”, “Unexpected parameter ‘{a}’ in get {b} function.”:“在{b}方法中不该用到参数’{a}’”, “Duplicate member ‘{a}’.”:“重复的’{a}’”, “Expected to see a statement and instead saw a block.”:“此处应该是语句声明.”, “Too many var statements.”:“过多var的声明”, “Redefinition of ‘{a}’.”:“‘{a}’被重复定义”, “It is not necessary to initialize ‘{a}’ to ‘undefined’.”:“无需将’{a}’初始化为’undefined’”, “Expected a conditional expression and instead saw an assignment.”:“此处需要一个表达式，而不是赋值语句”, “Expected a ‘break’ statement before ‘case’.”:“在’case’之前需要有’break’.”, “Expected a ‘break’ statement before ‘default’.”:“在’default’之前需要有’break’.”, “This ‘switch’ should be an ‘if’.”:“此处’switch’应该是’if’.”, “All ‘debugger’ statements should be removed.”:“请删除’debugger’的语句”, “‘{a}’ is not a statement label.”:“‘{a}’不是一个声明标签.”, “Expected an assignment or function call and instead saw an expression.”:“需要一个语句或者一个函数调用，而不是一个表达式”, “Function declarations should not be placed in blocks. Use a function expression or move the statement to the top of the outer function.”:“函数的声明不能放在类似if的块中，需要放在外部函数的顶部.”