Develop Reference

How to use hide() in Javascript

I am trying to hide a div the id of which I stored in a variable named 'post_container_id'. My code is:
document.addEventListener('DOMContentLoaded', function() {
// Add event listener to following button
document.querySelectorAll('.post-edit').forEach(item => {
var itemid = item.getAttribute('id').slice(5,)
item.addEventListener('click', () => edit_post(itemid));
})
});
function edit_post(itemid) {
var post_container_id = `#post-container-${itemid}`;
(function(){
$(post_container_id).hide(1000);
});
};
This does not hide the div. It does not throw any error either. The function does get triggered (I checked it by logging to console). What am I doing wrong?

There is a mistake here:
(function(){
$(post_container_id).hide(1000);
});
You are just declaring the function, you should also call it:
(function(){
$(post_container_id).hide(1000);
})();
Also, the callback is useless in this case, you can just solve it as:
function edit_post(itemid) {
var post_container_id = `#post-container-${itemid}`;
$(post_container_id).hide(1000);
};
$("#hide").click(function(){
edit_post(1);
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="post-container-1">secret</div>
<button id="hide">Click to hide</button>

You can also use vanilla JavaScript to hide/show the element directly by changing the style display property. As follows
function edit_post(itemid) {
const post_container_id = document.querySelectorAll(`#post-container-${itemid}`);
post_container_id.style.display = 'none';
};

Without jQuery,
document.getElementById(post_container_id).style.display = "none"

Have the element who call my js function

I know my question have answer in the past but I don't have the vocabulary to find this.
I call a JavaScript function like this:
Voir +
This function change the state of the element .stats-table but I want to know which button have been clicked to call this function?
Better : can I have a jQuery object of this button?

Try to pass the this reference to know which button was clicked,
HTML:
Voir +
JS:
function showTable(selec,elem){
var currentElem = $(elem); //Clicked element
}

If you don't want to change the signature of the function and the way you invoke it (as others have suggested), you can use the global window.event to identify the clicked element:
function showTable(selector)
{
var clickedElement = window.event.target;
//...
}
See MDN.

When you use jQuery, you might consider refactor your code like this:
$(document).ready(function(){
$('.show-table-link').on('click', function(){
var $usedButton = $(this)
showTable('.stats-table')
}
})
Voir +
It's good practice to attach the on click handler instead of writing it inline. Further reading document.ready and jQuery event basics.

You can pass any value or id and your can identify the function
<script type="text/javascript">
function showTable(clss_name,fun_id)
{
if(fun_id=='A1')
{
alert("First function Executed");
}
if(fun_id=='A2')
{
alert("Second Function is executed");
}
}
</script>
......
......
......
Voir +
Voir2 +

If your function is like this:
function showTable(selec) {
// some code
}
You can get the clicked element like this, using this:
function showTable(selec) {
// some code
var clickedElem = this;
}

how to pass parameter in jquery using .on?

Good Day, this maybe a silly question :) how can I pass a parameter to an external javascript function using .on ?
view:
<script>
var attachedPo = 0;
$this.ready(function(){
$('.chckboxPo').on('ifChecked', addPoToBill(attachedPo));
$('.chckboxPo').on('ifUnchecked', removePoToBill(attachedPo ));
});
</script>
external script:
function addPoToBill(attachedPo){
attachedPo++;
}
function removePoToBill(attachedPo){
attachedPo--;
}
but Im getting an error! thanks for guiding :)

You need to wrap your handlers in anonymous functions:
$('.chckboxPo')
.on('ifChecked', function() {
addPoToBill(attachedPo);
})
.on('ifUnchecked', function() {
removePoToBill(attachedPo);
});
You can also chain the calls to on as they are being attached to the same element.

If your intention is to count how many boxes are checked, via passing variable indirectly to functions try using an object instead like this:
JSFiddle: http://jsfiddle.net/TrueBlueAussie/pBkhX/
var attachedPo = {
count: 0
};
$(function () {
$('.chckboxPo')
.on('change', function () {
if ($(this).is(':checked')) {
addPoToBill(attachedPo);
} else {
removePoToBill(attachedPo);
}
$("#output").prepend("" + attachedPo.count + "<br/>");
});
});
function addPoToBill(attachedPo) {
attachedPo.count++;
}
function removePoToBill(attachedPo) {
attachedPo.count--;
}
If it is not doing anything else you can simplify the whole thing to count checked checkboxes:
$(function () {
var attachedPo = 0;
$('.chckboxPo')
.on('change', function () {
attachedPo = $(".chckboxPo:checked").length;
});
});
"DOM Ready" events:
you also needed to wrap it in a ready handler like this instead of what you have now:
$(function(){
...
});
*Note: $(function(){YOUR CODE HERE}); is just a shortcut for $(document).ready(function(){YOUR CODE HERE});
You can also do the "safer version" (that ensures a locally scoped $) like this:
jQuery(function($){
...
});
This works because jQuery passes a reference to itself through as the first parameter when your "on load" anonymous function is called.
There are other variations to avoid conflicts with other libraries (not very common as most modern libs know to leave $ to jQuery nowadays). Just look up jQuery.noConflict to find out more.

Calling a function (ex. namespace.show) by name

I want to call a function with a namespace based on its name.
Perhaps some background: What I want is, dynamically bind pages via $.mobile.loadPage(inStrUrl, { showLoadMsg: false }); and then, based on the current page, invoke a function within a loaded page. For example: each page has a showFilter function, the Event is attached to a main.html - page which should call the matching function in the current page.
I also tried some solutions, with jquery too, but nothing works for me.
This is my function code:
function namespace() { }
namespace.showFilter = function () {
alert("Test");
}
And want to "invoke" or "call" it via its name.
This is what i tried at least.
$(document).ready(function() {
var fn = window["namespace.showFilter"];
fn();
});
I get error TypeError: fn is not a function
Here is a fiddle http://jsfiddle.net/xBCes/1/

You can call it in the following way:
$(document).ready(function() {
window["namespace"]["showFilter"]();
});
or
$(document).ready(function() {
window["namespace"].showFilter();
});
or
$(document).ready(function() {
window.namespace.showFilter();
});

I found that I had to manually set it to window.
window.namespace = function() { }
window.namespace.showFilter = function () {
alert("Test");
};
$(document).ready(function() {
var fn = window["namespace"]["showFilter"];
fn();
});
http://jsfiddle.net/xBCes/4/

Like this:
$(function() {
window.namespace.showFilter();
});
P.S. I shortened the $(document).ready(...)

function namespace() {}
namespace.showFilter = function () {
alert("Test");
}
$(document).ready(function() {
var fn = namespace.showFilter();
fn();
});
http://jsfiddle.net/xBCes/3/

Minimize click()

$(this).click(function() {
clicked($(this));
});
How do I minimize this code to one line?
Tried this - doesn't work:
$(this).click(clicked(this));
It will be used then like this:
function clicked(element) {
element.css('...');
// some other code
}

You can pass the clicked function directly:
$(this).click(clicked);
but you'll need to change your clicked function to wrap the element.
function clicked() {
$(this).do("whatever")
}
Regarding your updated question, you can have clicked return a function if you want.
function clicked(element) {
return function() {
element.css('...');
// some other code
}
}
So then you can do this:
$(this).click(clicked($(this)));
But I'd personally change your clicked function to work like the first version.