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onclick Event

Event Object Reference Event Object

Example

Execute a JavaScript when a button is clicked:

<button onclick="myFunction()">Click me</button>
Try it yourself »

More "Try it Yourself" examples below.


Definition and Usage

The onclick event occurs when the user clicks on an element.


Browser Support

Event
onclick Yes Yes Yes Yes Yes

Syntax

In HTML:

<element onclick="myScript">Try it

In JavaScript:

object.onclick=function(){myScript};Try it

In JavaScript, using the addEventListener() method:

object.addEventListener("click", myScript);Try it

Note: The addEventListener() method is not supported in Internet Explorer 8 and earlier versions.


Technical Details

Bubbles: Yes
Cancelable: Yes
Event type: MouseEvent
Supported HTML tags: All HTML elements, EXCEPT: <base>, <bdo>, <br>, <head>, <html>, <iframe>, <meta>, <param>, <script>, <style>, and <title>
DOM Version: Level 2 Events
Examples

More Examples

Example

Click on a <button> element to display the current day, date and time:

<button onclick="getElementById('demo').innerHTML=Date()">What is the time?</button>
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Example

Click on a <p> element to change its text color to red:

<p id="demo" onclick="myFunction()">Click me to change my text color.</p>

<script>
function myFunction() {
    document.getElementById("demo").style.color = "red";
}
</script>
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Example

Another example on how to change the color of a <p> element by clicking on it:

<p id="demo" onclick="myFunction(this, 'red')">Click me to change my text color.</p>

<script>
function myFunction(elmnt,clr) {
    elmnt.style.color = clr;
}
</script>
Try it yourself »

Example

Click on a button to copy some text from an input field to another input field:

<button onclick="myFunction()">Copy Text</button>

<script>
function myFunction() {
    document.getElementById("field2").value = document.getElementById("field1").value;
}
</script>
Try it yourself »

Example

Assign the "onclick" event to the window object:

window.onclick = myFunction;

// If the user clicks in the window, set the background color of <body> to yellow
function myFunction() {
    document.getElementsByTagName("BODY")[0].style.backgroundColor = "yellow";
}
Try it yourself »

Example

Using onclick to create a dropdown button:

// Get the button, and when the user clicks on it, execute myFunction
document.getElementById("myBtn").onclick = function() {myFunction()};

/* myFunction toggles between adding and removing the show class, which is used to hide and show the dropdown content */
function myFunction() {
  document.getElementById("myDropdown").classList.toggle("show");
}

// Close the dropdown if the user clicks outside of it
window.onclick = function(event) {
  if (!event.target.matches('.dropbtn')) {

    var dropdowns = document.getElementsByClassName("dropdown-content");
    var i;
    for (i = 0; i < dropdowns.length; i++) {
      var openDropdown = dropdowns[i];
      if (openDropdown.classList.contains('show')) {
        openDropdown.classList.remove('show');
      }
    }
  }
}
Try it yourself »

Related Pages

HTML DOM reference: ondblclick event

HTML DOM reference: onmousedown event

HTML DOM reference: onmouseup event


Event Object Reference Event Object