How can I check whether a option already exist in select by JQuery

Question

How can I check whether a option already exist in select by JQuery   I want to dynamically add options into select and so I need to check whether the option is already exist to prevent duplication

User · Answer

if       your select id option value  lt enter value here gt     length    0      alert  option doesn t exist

User · Answer

Another way using jQuery   var exists   false       yourSelect  option   each function      if  this value    yourValue        exists   true

User · Answer

It s help me      var key    Hallo       if       chosen b option value    key       length    0       alert  option not exist              chosen b   append   lt option value    key    gt   key   lt  option gt             chosen b   val key          chosen b   trigger  chosen updated

User · Answer

I had a similar issue   Rather than run the search through the dom every time though the loop for the select control I saved the jquery select element in a variable and did this   function isValueInSelect  select  data value       return    select  children  option   map function index  opt           return opt value         get   includes data value

User · Answer

This evaluates to true if it already exists       yourSelect option value  yourValue     length  gt  0

User · Answer

Does not work  you have to do this   if       your select id option value  enter value here     length    0      alert  option doesn t exist

User · Answer

var exists       yourSelect option                   filter function  i  o    return o value     yourValue                     length  gt  0    This has the advantage of automatically escaping the value for you  which makes random quotes in the text much easier to deal with

User · Answer

Although most of other answers worked for me I used  find     if      yourSelect   find  option value  value     length     0

[jquery] How can I check whether a option already exist in select by JQuery

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