Pass function to a jquery key event? - javascript

I have a function foo(peram) which I want to call from multiple jquery .keyup() events.
How can I define/pass function foo so that I can call it from inside the event?
I tried something like this:
function foo(peram) {
alert(peram);
}
$("#someElement").keyup(function(alert) {
foo("You pressed a key!");
});
However I get TypeError: foo is not a function.
Update:
I have removed everything from my script and html, and it still does not work.
html:
<html>
<head>
<script src="../jquery-1.10.2.js" type="text/javascript"></script>
<script src="test.js" type="text/javascript"></script>
</head>
<body onload="asdf()">
<input type="text" name="name">
</body>
</html>
test.js:
function asdf() {
function hqxftg(stuff) {
alert(stuff);
}
$(document).ready(function() {
$('[name="name"]').keyup(function(hqxftg) {
alert(typeof hqxftg)
hqxftg("asdf");
})
})
}
It does seem to work in jsfiddle for some reason.

It is because you have named the event parameter same as the function
function asdf() {
function hqxftg(stuff) {
alert(stuff);
}
$(document).ready(function () {
$('[name="name"]').keyup(function (event) {
alert(typeof hqxftg)
hqxftg("asdf");
})
})
}
The event callback keyup receives the event object as the first parameter, you are naming it as hqxftg which overrides the external scoped function name.
Also there is no need to use the onload="", you can just use the dom ready callback
jQuery(function ($) {
function hqxftg(stuff) {
alert(stuff);
}
$('[name="name"]').keyup(function (event) {
alert(typeof hqxftg)
hqxftg("asdf");
})
})

You are missing a couple of things...
1) You miss the ; at the end of calling foo()
2) You are missing tags to close the jQuery selector
When you try this it will work:
function foo(peram) {
alert(peram);
}
$("#someElement").keyup(function(alert) {
foo("You pressed a key!");
});
JSFiddle here...
Update: Post has been updated and original comment of mine becomes obsolete.
I would go with the comment of Derek.
I am able to reproduce the problem: JSFiddle
Is it correct you have also foo declared as a var?

Try this code.
HTML
<input id="someElement" />
Java script:
function foo(peram) {
alert(peram);
}
$( document ).ready(function() {
$("#someElement").keyup(function() {
foo("You pressed a key!");
});
});
Demo

Related

Trigger function only on "onclick"

Hello I need a function to run when an a tag is clicked. I am using the onclick="" but it seems that the function runs on page load, instead of waiting to run when the a tag is clicked on. How do I make it so the function only runs when the a tag is clicked?
Here is my code.
HTML:
<a class="req_btn" onclick="conversionOne()">text</a>
<script type='text/javascript'>
(function conversionOne() {
alert("something");
})();
</script>
Thanks!
You are invoking the function when the script loads using an IIFE. Instead of this:
(function conversionOne() {
alert("something");
})();
Do this:
function conversionOne() {
alert("something");
}
You are using a self-executing function.
Declare the function in the global scope without executing it.
function conversionOne() {
alert("something");
}
Doing this
(function(){
/** code **/
})();
Means the code will be executed imediatelly.
in your case you want to create a function so you need this :
function conversionOne() {
/** code **/
}
or
var conversionOne = function () {
/** code **/
}
(function conversionOne() {
alert("something");
})();
calling function like this will work onload
Change this to
function conversionOne() {
alert("something");
};
More info

(document).ready is a global scope?

Guys i have this function inside my script.js:
$(document).ready(function() {
function alert() {
alert('AAAAAAAA');
}
});
And i am trying to call here in my index.html:
$('.something').on('click', function() {
e.preventDefault();
alert();
});
But is showing my this error - alert is not defined.
But when i take off the document ready in the external script, the click handler will work. Why is that?
The document ready is creating a separate scope?
Using $(document).ready() creates a new function scope (note the function() after the .ready), so when you call
$(document).ready(function() {
function alert() {
alert('AAAAAAAA');
}
});
alert is only defined within the document.ready block. There are two ways to solve this issue:
Define the function outside of the document.ready block:
function customAlert() {
alert('AAAAAAAA');
}
Attach the function to the window object:
$(document).ready(function() {
window.customAlert = function() {
alert('AAAAAAAA');
};
});
Include the click event into the document.ready
Check it here http://jsfiddle.net/fbrcm45q/1/
$(document).ready(function() {
function showAlert() {
alert('AAAAAAAA');
}
$('.something').on('click', function(e) {
e.preventDefault();
showAlert();
});
});
First of all e.preventDefault is a function so you have to add braces at the end:
e.preventDefault()
Second alert is a function in javascrpt, so you need to rename your function to something else, for example:
$(document).ready(function() {
function special_alert() {
alert('AAAAAAAA');
}
});
and:
$('.something').on('click', function() {
e.preventDefault();
special_alert();
});

How to call javascript function from ScriptManager.RegisterStartupScript?

I have the following javascript code:
<script type="text/javascript" language="javascript">
$(document).ready(
function () {
// THIS IS FOR HIDE ALL DETAILS ROW
$(".SUBDIV table tr:not(:first-child)").not("tr tr").hide();
$(".SUBDIV .btncolexp").click(function () {
$(this).closest('tr').next('tr').toggle();
//this is for change img of btncolexp button
if ($(this).attr('class').toString() == "btncolexp collapse") {
$(this).addClass('expand');
$(this).removeClass('collapse');
}
else {
$(this).removeClass('expand');
$(this).addClass('collapse');
}
});
function expand_all() {
$(this).closest('tr').next('tr').toggle();
};
});
</script>
I want to call expand_all function via code-behind .
I know I can use something like this, but it does not work and I don't understand used parameters:
ScriptManager.RegisterStartupScript(Me, GetType(String), "Error", "expand_all();", True)
Can you help me?
Because you have your expand_all function defined within anonymous $.ready event context. Put your code outside and it should work.
function expand_all(){
alert('test B');
}
$(document).ready(
function () {
// this won't work
function expand_all() {
alert('test A');
};
});
// will show test B
expand_all();
check this:
http://jsfiddle.net/jrrymg0g/
Your method expand_all only exists within the scope of the function inside $(document).ready(...), in order for you to call it from ScriptManager.RegisterStartupScript it needs to be at the window level, simply move that function outside the $(document).ready(...)
<script type="text/javascript" language="javascript">
$(document).ready(
function () {
....
});
function expand_all() {
$(this).closest('tr').next('tr').toggle();
};
</script>

Adding multiple functions on <body onload>

I am trying to add multiple onload functions into my <body>
My current code:
<body onload="_googWcmGet(number, '1800 000 000'); initialize()">
The _googWcmGet is working but the second function isn't working... Please help!
document.body.addEventListener( 'load', function1, false );
document.body.addEventListener( 'load', function2, false );
// etc.
Or, if you're using jQuery, just use as many of these as you need:
$(function(){ … });
$(function(){ … });
$(function(){ … });
There is no different how many statements you wrote in onload event:
function f() {
console.log('f');
}
function g() {
console.log('g');
}
<body onload="f(); g()"></body>
I believe you have an error in your first function:
function f() {
console.log(undefinedVariable);
}
function g() {
console.log('g');
}
<body onload="f(); g()"></body>
As you see, the g() won't execute as there is an error in the first function.
I modified the code provided above with a JQuery instead of a $. This code is now working well.
Correct Code - Functioning Well:
jQuery(document).ready(function() {
_googWcmGet('number', '1800 198 885');
initialize();
});
It seems that console.log is the problem. Take a look at this link
https://developer.mozilla.org/en-US/docs/Web/API/Console.log
Calling multiple functions onload is possible like you did, see article. Here are other ways:
I
function init() {
_googWcmGet(number, '1800 000 000');
initialize();
}
<body onload="init()">
//or
window.onload = init;
II
$(document).ready(function() {
//or
//$(function() {
_googWcmGet(number, '1800 000 000');
initialize();
});

Call in a function another function JQuery

I have two JQuery funciont and i need to start one of them in one function. This is my example:
<script type="text/javascript">
$(document).ready(function aa() {...... })
</script>
And i want to call this function in another:
<script type="text/javascript">
function hello(){
aa();
}
</script>
Need a tiny bit of restructuring to move aa out of $(document).ready at top of your code so you can use it elsewhere also
/* call aa as ready handler*/
$(document).ready(aa);
/* aa now global*/
function aa() {
$('#catAssociate tbody tr').contextMenu('myMenu2', {
bindings: {
'open': function (t) {
console.log("chiamo ioooo");
DeleteAction(t, "Open");
},
}
});
}
aa is unaccessible because you defined it within $(document).ready, try putting it in global scope
function aa() {
...
}
$(document).ready(aa);
and in your other script you can call it as such
function hello(){
aa();
}

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