jQuery form input select by id

Question

Code  lt form id  a  gt     lt input id  b  value  dave  gt   lt  form gt   Question How do I get the value from input  b  while at the same time make sure it is inside  a   something like     a input id b      I only ask because I might have other inputs called  b  somewhere else in my page and I want to make sure I m getting the value from the correct form

User · Answer

You can just target the id directly   var value       b   val      If you have more than one element with that id in the same page  it won t work properly anyway  You have to make sure that the id is unique   If you actually are using the code for different pages  and only want to find the element on those pages where the id s are nested  you can just use the descendant operator  i e  space   var value       a  b   val

User · Answer

If you have more than one element with the same ID  then you have invalid HTML   But you can acheive the same result using classes instead  That s what they re designed for    lt input class  b       gt    You can give it an ID as well if you need to  but it should be unique   Once you ve got the class in there  you can reference it with a dot instead of the hash  like so   var value       a  b   val      or  var value       a input b   val      which will limit it to  b  class elements that are inputs within the form  which seems to be close to what you re asking for

User · Answer

Why not just       b   click function          var val     this  val          Or if you don t click it  and I guess you won t  and you will use submit button  you can use prev   function either

User · Answer

You can do that using the descendant selectors        a  b     However  id values are supposed to be unique on a page

User · Answer

For example like this   var value       a   find   b   val

[jquery] jQuery form input select by id

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