jQuery detect if string contains something

Question

I m trying to write jQuery code to detect if a live string contains a specific set of characters then the string alerts me   HTML   lt textarea class  type  gt  lt  textarea gt    My Jquery      type   keyup function         var v       type   val        if      type   is   contains   gt   lt                console log  contains  gt   lt                       console log     type   val           if for example I typed the following   gt   lt a href  http   google com  gt Google lt  a gt   lt a href  http   yahoo com  gt Yahoo lt  a gt    My code should console log alert me that there    lt  present in the string

User · Answer

You get the value of the textarea  use it        type   keyup function         var v       type   val       you d better use this value here     if  v indexOf   gt   lt     -1           console log  contains  gt   lt

User · Answer

You could use String prototype indexOf to accomplish that  Try something like this    x000D   x000D      type   keyup function     x000D    var v     this  val    x000D    if  v indexOf   gt   lt        -1    x000D      console log  contains  gt   lt     x000D      x000D    console log v   x000D      x000D   lt script src  https   ajax googleapis com ajax libs jquery 2 1 1 jquery min js  gt  lt  script gt  x000D   lt textarea class  type  gt  lt  textarea gt  x000D   x000D   x000D    Update  Modern browsers also have a String prototype includes method

User · Answer

use Contains of jquery Contains like this   if      type contains   gt   lt      length  gt  0       do stuffs to change

User · Answer

You can use javascript s indexOf function   var str1    ABCDEFGHIJKLMNOP   var str2    DEFG   if str1 indexOf str2     -1      alert str2     found

[jquery] jQuery detect if string contains something

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