JavaScript Events with return value - JavaScript Tutorial 109

Published: 05 May 2023
on channel: ChidresTechTutorials

482

Notes for You:: JavaScript Events with return value - JavaScript Tutorial 109

Example 1:
<a href="https://www.google.com" onclick="return DisplayConfirmBox()">Google</a>

<script type="text/javascript">

function DisplayConfirmBox()
{
return confirm("Are you sure; you want to visit google.com?");
}

</script>

Example 2:
default.html code

<form action="processor.html" onsubmit="return validate()">
<label>User Name:</label>
<input type="text" name="txtUserName" id="txtUserName" value=""/>
<span id="errorMessage"></span><br/>
<input type="submit"/>
</form>

<script type="text/javascript">

function validate()
{
var txtUserName = document.getElementById("txtUserName");
var errorMessage = document.getElementById("errorMessage");
if(txtUserName.value != "")
{
return true;
}
else
{
errorMessage.innerHTML = "*";
errorMessage.style.color = "red";
return false;
}
}
</script>

processor.html code
<script type="text/javascript">
var urlSearchParams = new URLSearchParams(window.location.search);
alert("Welcome:" + urlSearchParams.get("txtUserName"));
</script>

Note:
replace < with less-than symbol.
replace > with greater-than symbol.

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