Check if textbox has empty value

Question

I have the following code   var inp       txt     if inp val             do something   Is there any other way to check for empty textbox using the variable  inp

User · Answer

var inp       txt   val    if jQuery trim inp  length  gt  0         do something     Removes white space before checking  If the user entered only spaces then this will still work

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if       txt   val   length    0          do something     I had to add in the    to get it to work for me  otherwise it ignored the condition even with empty text input  May help someone

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Use the following to check if text box is empty or have more than 1 white spaces  var name   jQuery trim     ContactUsName   val      if   name length    0         Your code    else       Your code

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input text   filter function     return this value length  gt  0

User · Answer

if  inp val   length  gt  0           do something     if you want anything more complicated  consider regex or use the validation plugin which takes care of this for you

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Also You can use   value       txt   val     if  value                Your Code Here   else        Your code     Try it  It work

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if       txt   val   length  gt  0          do something     Your method fails when there is more than 1 space character inside the textbox

User · Answer

The check can be done like this   if    inp val           and even shorter   if  inp val

[jquery] Check if textbox has empty value

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