CODEWITHSUNDEEP
javascriptjqueryhtmlcss
Ethelene Laverne
Ethelene Laverne

Reputation: 289

Maximum number of characters in search field

I have search field and it doesn't have that typical submit button. It looks like this: enter image description here

HTML:

<div class="input-group">
    <input type="text" class="form-control" name="keyword" id="searchbox" onkeypress="return checkLength()"/>
    <span class="btn btn-primary input-group-addon" onclick="checkLength()"><i class="fa fa-search"></i></span>
</div>

I only added a span and not the input element for submit button. How do I validate if the user types or inputs not less than 2 characters? If the user types in 1 character only then presses that search button or just hit the enter key, there should be a red error message at the bottom of the search field saying "Keyword should be not less than 2 characters" or something like that.

I tried this code but it's not working:

function checkLength(){
    var textbox = document.getElementById("searchbox");
    if(textbox.value.length <= 10 && textbox.value.length >= 2){
        alert("success");
    } else {
        alert("Keyword should be not less than 2 characters");
        $(document).keypress(function (e) {
            var keyCode = (window.event) ? e.which : e.keyCode;
            if (keyCode && keyCode == 13) {
                e.preventDefault();
                return false;
            }
        });
    }
}

Need help. Thanks.

EDIT:

After inputting keywords and hit the enter key, the page would redirect to a search results page, but that should be prevented from happening if the inputted keyword does not have 2 or more characters, hence, displaying a red text error message below the search field. How to do it?

Upvotes: 4

Views: 2537

Answers (4)

Vince
Vince

Reputation: 1851

I made a jsfiddle that might be close to what you want.

Take a gander and see what you can make of it.

Don't hesitate to ask questions about it.

My best explanation is:

There is an event handler on both the input and the submit button that test the input's value. Based on the conditions that I have assumed from your question, either a success alert or an error message is shown. The success alert could be replaced with an ajax call or to trigger a form submission.

Upvotes: 0

nim007
nim007

Reputation: 3058

You can use pattern attribute in HTML5 input, and you can validate the text with just CSS:

.error {
  display: none;
  font: italic medium sans-serif;
  color: red;
}
input[pattern]:required:invalid ~ .error {
  display: block;
}
<form>
  <input type="text" name="pattern-input" pattern=".{2,}" title="Min 2 characters" required>
  <input type="submit">
  <span class="error">Enter at least two characters</span>
</form>

Here is the Fiddle

Note: This would work with all modern browsers, IE9 and earlier doesn't seems to have support for :invalid, :valid, and :required CSS pseudo-classes till now and Safari have only partial support.

Upvotes: 7

guest271314
guest271314

Reputation: 1

Try utilizing .previousElementSibling to select span .nodeName to select input set div .innerHTML to empty string "" or "Keyword should be not less than 2 characters" , using input event

var msg = document.getElementById("msg");

function checkLength(elem) {
  var el = elem.type === "text" ? elem : elem.previousElementSibling
  , len = el.value.length < 2;
  msg.innerHTML = len ? "Keyword should be not less than 2 characters" : "";
  $(el).one("input", function() {
    checkLength(this)
  })
}
#msg {
  color:red;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div class="input-group">
  <form>
    <input type="text" class="form-control" name="keyword" id="searchbox" />
    <input type="button" class="btn btn-primary input-group-addon" onclick="checkLength(this)" value="X" />
  <div id="msg"></div>
  </form>
</div>

Upvotes: 1

Kishore Sahasranaman
Kishore Sahasranaman

Reputation: 4230

Jquery Validation plugin can be used. it is very simple.

$(document).ready(function(){
    $("#registerForm").validate();
  });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://ajax.microsoft.com/ajax/jquery.validate/1.7/jquery.validate.min.js"></script>
<form id='registerForm' name='registerForm' method='post' action='' >   <p>
   Search <input type='text' name='name' id='name'  minlength="2"     class='required' />
   </p>
</form>

sample

Ref : http://jqueryvalidation.org/documentation/

Upvotes: 1

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