How do I add slashes to a string in Javascript

Question

Just a string  Add    to it every time there is a single quote

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if   String prototype hasOwnProperty  addSlashes          String prototype addSlashes   function             return this replace   amp  g    amp amp       This MUST be the 1st replacement                   replace    g    amp apos       The 4 other predefined entities  required                   replace    g    amp quot                  replace     g                        replace   lt  g    amp lt                  replace   gt  g    amp gt    replace   u0000 g     0                  Usage  alert str addSlashes      ref  https   stackoverflow com a 9756789 3584667

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var str    This is a single quote    and so is this      console log str    var replaced   str replace    g          console log replaced     Gives you   This is a single quote    and so is this    This is a single quote     and so is this

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var myNewString   myOldString replace    g

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To be sure  you need to not only replace the single quotes  but as well the already escaped ones    first   and    second  replace        g

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replace works for the first quote  so you need a tiny regular expression   str   str replace    g

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Following JavaScript function handles        b   t   n   f or  r equivalent of php function addslashes     function addslashes string        return string replace     g                   replace   u0008 g     b            replace   t g     t            replace   n g     n            replace   f g     f            replace   r g     r            replace    g                   replace    g

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An answer you didn t ask for that may be helpful  if you re doing the replacement in preparation for sending the string into alert   -- or anything else where a single quote character might trip you up   str replace       x27     That will replace all single quotes with the hex code for single quote

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A string can be escaped comprehensively and compactly using JSON stringify  It is part of JavaScript as of ECMAScript 5 and supported by major newer browser versions   str   JSON stringify String str    str   str substring 1  str length-1     Using this approach  also special chars as the null byte  unicode characters and line breaks  r and  n are escaped properly in a relatively compact statement

[javascript] How do I add slashes to a string in Javascript?

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