I have a problem in understanding the functionality of onclick.For instance:-
HTML
<input type="button" onclick="yetAnotherAlert()" />
JS
<script type="text/javascript">
function yetAnotherAlert(textToAlert) {
alert(textToAlert);
}
yetAnotherAlert("This is Chapter 2");
</script>
Over here I was expecting that once I click on the button,the function yetAnotherAlert() would be invoked.But as I open the page in my Chrome,it triggers without even clicking on the button[Onclick functionality does work here].My question is:-Why is the function getting triggered before loading the page?
Because you are calling function during page loading
yetAnotherAlert("This is Chapter 2");
Remove it. And you have to pass string during click event like this
<input type="button" onclick="yetAnotherAlert('This is Chapter 2')" />
Related
Im actually having a problem with html5 button in visualforce pages. I have a requirement where when i click on a button, it should redirect to a certain page (user do not want link). For some reason which i don't know, the function i'm executing do not work with HTML5 button (in fact the page only refresh but do not redirect) but when i use input of type button, the function is executed as expected.
I want to use the html5 button as there are some specific css already defined for button in the plugin im using. Find below codes for my button and javascript function :
<button class="butt" onclick="newContact()" >Nouveau</button>
<script type="text/javascript">
function newContact(){
window.location = "/apex/VFP01_NewContact";
}
</script>
What did I do wrong here, and what is the limitation of html5 button ?
Got to know the answer. In visualforce page, the html5 button execute a submit of my form. A way to prevent this, was to specify the attribute type="button".
You really have two options.
You could consider wrapping a element with an anchor tag that points to the URL that you want to target as seen below :
<!-- Target the "YourAction" action in your "YourController" controller -->
<a href='#Url.Action("YourAction","YourController")'>
<input type="Button" id="mybutton" name="url button" value="Next" />
</a>
or you could handle this purely through Javascript and perform your navigation that way :
<!-- The onclick event will trigger a Javascript call to navigate -->
<input type="Button" id="mybutton" name="url button" value="Next" onclick="window.location.href='#Url.Action("YourAction","YourController")';" />
Hello everyone and sorry for my english.
Following this jdfiddle, I have a problem I don't understand.
First I change the value of the input, then I click on the button and what I expected to see is "click" but I see "change" meaning onclick is called after onchange.
<input type="text" onChange="alert('change')" />
<button type="button" onClick="alert('click');">Click!</button>
I found on this post that it's because of chrome which fires onchange event before the onclick event. But I don't really have the same need as this post because my event are not declared in the same tag. And secondly, if I click on the button I would like to only execute the onclick function and not onclick and then onchange (this methods consists in using onMouseDown).
Do you have a good method to do that?
Ok so I can see that you really wan't this.
You could let the on change function run first, and then afterward see what has focus, if it is that button, you would know that it was clicked, and thus was the reason for loosing focus.
you cannot check this while the change function is running, as the body still has focus at this time..
<head>
<script language="javascript">
function focussed()
{
var triggerElement = document.activeElement
alert(triggerElement)
console.info(triggerElement)
}
function change()
{
alert("change")
setTimeout(focussed, 1)
return true
}
</script>
</head>
<body>
<input type="text" onChange="alert('change')" />
<button type="button" onClick="alert('click');">Click!</button>
</body>
How can I automatically click on an object using onload() with HTML.
Here's the button I would like to be automatically clicked:
<input type="button" value="{$LANG.checkout} »" class="checkout" onclick="addtocart();" />
What I would like to happen is for the button to be clicked automatically; as soon as a certain div is loaded. I know it's possible to do with Javascript, but is there any way to do it without javascript? If javascript is the only way I am more than open to it!
As a comment says, is not need to 'trigger a click automatically', just add the functionality in a script tag (or even better, in a separate file):
HTML
<input type="button" value="{$LANG.checkout} »" class="checkout" />
JS
<script>
addToCart();
function addToCart(){
//your code here...
};
</script>
Include this tag before the tag </body> (where body finish) and it will be execute when all your HTML (DOM) be ready.
I'm working with html and javascript. My problems is, in one webpage a show a plot and a few button. When the user press any of this button I need show 3 or 4 options but in the same page without switching pages.
Below is my code
<form action="MyPage">
<button type="submit" value="More Options">
</form>
redirect to an other page.What I can do?
First of all, get rid of type="submit". That's what's causing the page to do stuff you don't want. The second thing is to add an onclick handler. It should return false to avoid behavior like "submit". The variable 'this' will pass the button to your function, which you might need in that code. Then fill in the body of addMoreStuff() with your code to, well, add more stuff!
<form action="MyPage">
<button onclick="addMoreStuff(this); return false; ">More Options</button>
</form>
<script type="text/javascript">
function addMoreStuff(button) {
/* your code here */
}
</script>
Drop the form (use the button alone), and look into jQuery. It's extremely easy to use, and it'll help you quickly build code your application.
HTML
<button type="submit" value="More Options" id="more">
JavaScript (jQuery)
// run "add_options" when someone clicks on the button
jQuery('button#more').on('click', add_options)
function add_options() {
//code here to add more options
}
I want to execute a command by the click of a button, and not when the page loads.
function hey() {
alert('bla');
}
Do I add something to the code above or to the button?
<input type="button" value="Click Me" onclick="hey()" />
Have you taken the time to type in your question into the magical Google box yet? Surely you'll see something like this:
<input type="button" value="Click me, now" onclick="hey()" />
Say you have the function that alerts a window to the user.
<script type="text/javascript">
function showMe() {
alert('You clicked on the button');
}
</script>
<button onclick="showMe()">Button</button>
This will make sure that the function is only called when the button is clicked upon and not when the page is loaded.
Okay, so you have a code that should work for alerting something on the click of a button. But you state that the code is running on page load. You have to check you code, looking for:
An onload attribute on the body tag, something like <body onload="hey()">
A call to hey somewhere else on your js code. Look for hey().
Maybe a reference to the button followed by a call to .click()
There is something else on your code causing the function to be called, you'll have to scan your code to find out what it is.