## 前言 通過本文你將了解js中常見的錯誤類型，并且希望你能熟悉了解他們。 ## 常見格式錯誤枚舉 “Missing semicolon.” : “缺少分號.”, “Use the function form of \”use strict\”.” : “使用標準化定義function.”, “Unexpected space after ‘-’.” : “在’-'后面不應出現空格.”, “Expected a JSON value.” : “請傳入一個json的值.”, “Mixed spaces and tabs.”: “空格和TAB重復.”, “Unsafe character.” : “不安全的字符.”, “Line too long.”: “本行中的字符超過設定的最大長度.”, “Trailing whitespace.”: “本行末尾有過多無用空格.”, “Script URL.” : “腳本URL.”, “Unexpected {a} in ‘{b}’.” : “在 ‘{b}’ 中不該出現 {a}.”, “Unexpected ‘{a}’.” : “不該在此出現’{a}’.”, “Strings must use doublequote.” : “字符串需要用雙引號”, “Unnecessary escapement.” : “不需要轉義”, “Control character in string: {a}.” : “在字符串中出現了Control的字符”, “Avoid \\’.” : “避免 \\”, “Avoid \\v.” : “避免 \\v”, “Avoid \\x-.” : “避免 \\x-”, “Bad escapement.” : “錯誤的轉義字符”, “Bad number ‘{a}’.” : “錯誤的數字 ‘{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}’中使用點尾隨小數點”, “Unexpected comment.” : “不該在此處出現注釋”, “Unescaped ‘{a}’.” : “沒有轉義 ‘{a}’”, “Unexpected control character in regular expression.” : “在正則表達式中出現了control字符”, “Unexpected escaped character ‘{a}’ in regular expression.” : “在正則表達式中出現了沒有轉義的字符 ‘{a}’”, “Expected ‘{a}’ and instead saw ‘{b}’.” : “應該用 ‘{a}’代替’{b}’”, “Spaces are hard to count. Use {{a}}.” : “空格難以統計，請使用 {{a}}”, “Insecure ‘{a}’.” : “不安全的 ‘{a}’”, “Empty class.” : “空的class”, “Expected a number and instead saw ‘{a}’.”:“應該用數字代替’{a}’”, “‘{a}’ should not be greater than ‘{b}’.”:“‘{a}’不應該比’{b}’大”, “‘hasOwnProperty’ is a really bad name.”: “‘hasOwnProperty’是關鍵字”, “‘{a}’ was used before it was defined.”:“‘{a}’未定義就已經使用了.”, “‘{a}’ is already defined.”:“‘{a}’被重復定義”, “A dot following a number can be confused with a decimal point.”:“數字后面的一個點會被誤認為是十進制的小數點”, “Confusing minusses” : “容易混淆的負數表達-”, “Confusing plusses.” : “容易混淆的正數表達+”, “Unmatched ‘{a}’.” : “無法匹配的’{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，用來代替’{d}’”, “Unexpected early end of program.”:“程序不可預期的提前終止”, “A leading decimal point can be confused with a dot: ‘.{a}’.”:“‘{a}’前的點容易混淆成小數點”, “Use the array literal notation [].”:“使用數組的符號 []“, “Expected an operator and instead saw ‘{a}’.”:“需要用一個符號來代替’{a}’”, “Unexpected space after ‘{a}’.”:“在’{a}’之后不能出現空格”, “Unexpected space before ‘{a}’.”:“在’{a}’之前不能出現空格”, “Bad line breaking before ‘{a}’.”:“在’{a}’之前錯誤的換行”, “Expected ‘{a}’ to have an indentation at {b} instead at {c}.”:“‘{a}’需要在{c}而不是{b}處縮進”, “Line breaking error ‘{a}’.”:“換行錯誤 ‘{a}’”, “Unexpected use of ‘{a}’.”:“此處不能用’{a}’”, “Bad operand.”:“錯誤的操作數”, “Use the isNaN function to compare with NaN.”:“使用isNaN來與NaN比較”, “Confusing use of ‘{a}’.”:“容易混淆的’{a}’的使用”, “Read only.”:“只讀的屬性”, “‘{a}’ is a function.”:“‘{a}’是一個函數”, ‘Bad assignment.’:“錯誤的賦值”, “Do not assign to the exception parameter.”:“不要給額外的參數賦值”, “Expected an identifier in an assignment and instead saw a function invocation.”:“在賦值的語句中需要有一個標識符，而不是一個方法的調用”, “Expected an identifier and instead saw ‘{a}’ (a reserved word).”:“需要有一個標識符，而不是’{a}’(保留字符)”, “Missing name in function declaration.”:“在方法聲明中缺少名稱”, “Expected an identifier and instead saw ‘{a}’.”:“需要有一個標識符，而不是’{a}’”, “Inner functions should be listed at the top of the outer function.”:“內部函數的聲明應該放在此函數的頂部。”, “Unreachable ‘{a}’ after ‘{b}’.”:“在’{b}’之后無法獲取’{a}’”, “Unnecessary semicolon.”:“不必要的分號”, “Label ‘{a}’ on {b} statement.”:“將’{a}’放在{b}的聲明中”, “Label ‘{a}’ looks like a javascript url.”:“‘{a}’看上去像一個js的鏈接”, “Expected an assignment or function call and instead saw an expression”:“需要一個賦值或者一個函數調用，而不是一個表達式.”, “Do not use ‘new’ for side effects.”:“不要用’new’語句.”, “Unnecessary \”use strict\”.”:“不必要的\”use strict\”.”, “Missing \”use strict\” statement.”:“缺少\”use strict\”的聲明”, “Empty block.”:“空的模塊”, “Unexpected /*member ‘{a}’.”:“不應出現 /*元素 ‘{a}’.”, “‘{a}’ is a statement label.”:“‘{a}’是一個聲明”, “‘{a}’ used out of scope.”:“‘{a}’使用超出范圍”, “‘{a}’ is not allowed.”:“不允許使用’{a}’”, “‘{a}’ is not defined.”:“‘{a}’沒有被定義”, “Use ‘{a}’ to compare with ‘{b}’.”:“使用’{a}’與’{b}’相比”, “Variables should not be deleted.”:“變量需要被刪除”, “Use the object literal notation {}.”:“使用對象的文字符號 {}”, “Do not use {a} as a constructor.”:“不要使用{a}作為一個構造對象”, “The Function constructor is eval.”:“The Function constructor is eval.”, “A constructor name should start with an uppercase letter.”:“一個構造對象的名稱必須用大寫字母開頭.”, “Bad constructor.”:“錯誤的構造對象”, “Weird construction. Delete ‘new’.”:“構造對象有誤，請刪除’new’”, “Missing ‘()’ invoking a constructor.”:“缺少括號()”, “Avoid arguments.{a}.”:“避免參數.{a}.”, “document.write can be a form of eval.”:“document.write是eval的一種形式”, ‘eval is evil.’:“盡量不要使用eval”, “Math is not a function.”:“Math不是一個函數”, “Missing ‘new’ prefix when invoking a constructor.”:“此處缺少了’new’”, “Missing radix parameter.”:“缺少參數”, “Implied eval is evil. Pass a function instead of a string.”:“傳遞一個函數，而不是一個字符串”, “Bad invocation.”:“錯誤的調用”, “['{a}'] is better written in dot notation.”:“['{a}']最好用點.的方式”, “Extra comma.”:“多余的逗號”, “Don’t make functions within a loop.”:“不要用循環的方式創建函數”, “Unexpected parameter ‘{a}’ in get {b} function.”:“在{b}方法中不該用到參數’{a}’”, “Duplicate member ‘{a}’.”:“重復的’{a}’”, “Expected to see a statement and instead saw a block.”:“此處應該是語句聲明.”, “Too many var statements.”:“過多var的聲明”, “Redefinition of ‘{a}’.”:“‘{a}’被重復定義”, “It is not necessary to initialize ‘{a}’ to ‘undefined’.”:“無需將’{a}’初始化為’undefined’”, “Expected a conditional expression and instead saw an assignment.”:“此處需要一個表達式，而不是賦值語句”, “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’.”:“此處’switch’應該是’if’.”, “All ‘debugger’ statements should be removed.”:“請刪除’debugger’的語句”, “‘{a}’ is not a statement label.”:“‘{a}’不是一個聲明標簽.”, “Expected an assignment or function call and instead saw an expression.”:“需要一個語句或者一個函數調用，而不是一個表達式”, “Function declarations should not be placed in blocks. Use a function expression or move the statement to the top of the outer function.”:“函數的聲明不能放在類似if的塊中，需要放在外部函數的頂部.”