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HTML DOM Input Search Required Property
The HTML DOM input Search required property is associated with the required attribute of an <input> element. The required property is used for setting and returning if it is necessary to fill some search field or not before the form is submitted to the server. This allows the form to not submit if a search field with required attribute is left empty by the user.
Syntax
Following is the syntax for −
Setting the required property −
searchObject.required = true|false
Here, true represents that the search field must be filled while false represents its optional to fill the field before submitting the form.
Example
Let us look at an example for the input search required property −
<!DOCTYPE html>
<html>
<body>
<h1>Input search required property</h1>
<p>Check if the above field is mandatory to be filled or not by clicking the below
button</p>
<form action="/https/www.tutorialspoint.com/Sample_page.php">
FRUITS: <input type="search" id="SEARCH1" name="fruits" required>
<input type="submit">
</form>
<br>
<button onclick="checkReq()">CHECK</button>
<p id="Sample"></p>
<script>
function checkReq() {
var Req=document.getElementById("SEARCH1").required;
if(Req==true)
document.getElementById("Sample").innerHTML="The search field must be filled before submitting";
else
document.getElementById("Sample").innerHTML="The search field is optional and can be left blank by the user";
}
</script>
</body>
</html>
Output
This will produce the following output −
On clicking the CHECK button −
If the required property is set true and you click submit −
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