/Html/Javascript check if input is empty

Javascript check if input is empty

How to check if all inputs are not empty with javascript

const inputFeilds = document.querySelectorAll("input");

const validInputs = Array.from(inputFeilds).filter( input => input.value !== "");

console.log(validInputs) //[array with valid inputs]

If input value is null do something

if(document.getElementById("question").value.length == 0)
{
    alert("empty")
}

Javascript check if input is empty

<!-- check if any input field in "Form" is empty using JS -->

<script type="text/javascript">
  function validateForm() {
    var a = document.forms["Form"]["answer_a"].value;
    var b = document.forms["Form"]["answer_b"].value;
    if (!a || !b) {
      alert("Please Fill All Required Fields");
      return false;
    }
  }
</script>

<form method="post" name="Form" onsubmit="return validateForm()" action="">
  <input type="text" name="answer_a" value="">
  <input type="password" name="answer_b" value="password">
</form>

Source: stackoverflow.com

Javascript check if input is empty

if(document.getElementById("question").value.length == 0)
{
    console.log("empty")
}

Similar codes

0 vote288 views1 answer
Hashtag in html
Html
1 vote280 views1 answer
Css radio default checked
Html
0 vote299 views1 answer
Render text as html react
Html
0 vote294 views1 answer
Django template tags background-image
Html
0 vote327 views1 answer
Html web page examples with source code github
Html
0 vote255 views1 answer
Font awesome src
Html
-2 votes280 views2 answers
W3schools css cdn
Html
1 vote297 views1 answer
Ion-content background color
Html
0 vote272 views1 answer
LWC tags in xml salesforce
Html
0 vote256 views1 answer
How to pan in mac preview
Html