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Call function with mouse click

I have a text area. Each time the enter key is entered the cursor travels to the next line of the text area and a function is called. This function posts/updates the entry in a database. I want it so that if I edit a line and then click on the mouse to resume typing at another line the function is again called on the mouse click
$("#textarea").keydown(function (e) {
if (e.keyCode == 13) {
document.addEventListener('keydown', newLine(this, "\n"));
console.log("code added");
e.preventDefault();
stream();
Is it possible to change my line to something like this and the method gets called on pressing the enter key or pressing the mouse(anywhere in the text area)?
if (e.keyCode == 13 || mouse.click) {
I know the above isn't correct but want to illustrate what I'm after

You could take use of jQuery's .on method like so:
$("#textarea").on('click keydown', (e) => {
if(e.keyCode && e.keyCode == 13 || e.type == "click" ){
// Do stuff
}
});
It takes a first parameter as string with different events, which mean you can listen to multiple events at once. The second is a callback function, where you can track the event that is triggered. Nb: Events are different between click and keydown. You can have a closer look by putting console.log(e); in your callback

You'll need to attach another event listener. The keydown event will not trigger when a mouse is clicked. You will need to add a $(...).click(function ...) as well. For example...
function myFunction (e) {
document.addEventListener('keydown', newLine(this, "\n"));
console.log("code added");
stream();
}
$("#textarea").keydown(function() {
if (e.keyCode == 13) {
myFunction()
e.preventDefault();
}
});
$('#textarea').click(myFunction)

Instead of putting a condition you can create 2 events and a common function to handle it.
Foe Example:
$("#textarea").keydown(function (e) {
if (e.keyCode == 13) {
logic1()
$("#textarea").click(function() { logic1();});
function logic1(){
document.addEventListener('keydown', newLine(this, "\n"));
console.log("code added");
e.preventDefault();
stream();
}

I don't know about jQuery but with vanilla JS you can do something like this:
const textarea = document.querySelector('textarea');
const foo = event => {
const output = document.querySelector('output');
output.textContent = event.type;
}
textarea.addEventListener('click', foo, false);
textarea.addEventListener('keypress', foo, false);
<textarea></textarea>
<output></output>

Understanding how many times the jquery events are called and right handling of keyup event

I am trying to develop my webpage where I have a simple input field where I can type something. I want that when I type something and press "enter", a function gets called. The code I am using is:
$(document).ready(function(){
$("#searchBar").click(function(){
$("#searchBar").keyup(function (e) {
if (e.keyCode == 13) {
$(this).trigger("enterKey");
}
});
$("#searchBar").bind("enterKey", function (e) {
searchFunction();
});
})
})
Something is not working well. I have 2 questions:
First of all by debugging on the browser I realize that the event "keyup" is called whenever I type any kind of character, but not when I press "enter" and I don't know why.
By always debugging and using a breakpoint on the keyup handler, it happens that when I press a key, in order to get out from the breakpoint I have to resume the script execution once.. then if I type another character and I go again at the breakpoint, I have to resume the script exectuion twice instead of once to continue debugging.. and so on incresing.. why do I have this kind of behavior?
Thanks in advance!

Two problems:
#searchBar only listens to keyUp and Enter if you have clicked on it at least once
#searchBar adds a new keyUp and Enter listener for each time it receives a click event
I'd just bind the events once like so:
$(document).ready(function(){
$("#searchBar").keyup(function (e) {
if (e.keyCode == 13) {
$(this).trigger("enterKey");
}
});
$("#searchBar").bind("enterKey", function (e) {
searchFunction();
});
});
I can't come up with a valid reason to stop listening to the events, but if that's what you want, then I'd unbind just before or after the call to your searchFunction();
$(document).ready(function(){
$("#searchBar").click(function(e){
$(this).keyup(function (e) {
if (e.keyCode == 13) {
$(this).trigger("enterKey");
}
});
$(this).bind("enterKey", function (e) {
searchFunction();
$(this).unbind("enterKey");
$(this).unbind("keyup");
});
});
// but you'd also need to unbind the events if the user clicks somewhere else in the document, otherwise, these events would still get attached every time the user clicks #searchBar
});
But it's unnecessary, as the events are only fired when #searchBar has focus. All these events also detach if you delete #searchBar
Also, why fire "enterKey" when you already are listening for keystrokes?
$(document).ready(function(){
$("#searchBar").keyup(function (event) {
var keycode = event.keyCode || event.which; //this for cross-browser compatibility
if (keycode == 13) {
searchFunction();
}
});
});

I have to resume the script exectuion twice instead of once to
continue debugging.. and so on incresing.. why do I have this kind of
behavior?
You are attaching a new keyup and enterKey event at each click on element.
Remove click event or use .one() to attach click event
$(document).ready(function() {
var search = $("#searchBar").keyup(function (e) {
if (e.keyCode == 13) {
search.trigger("enterKey");
}
})
.on("enterKey", function (e) {
searchFunction();
});
})
or, if one click is intended to begin process
$(document).ready(function(){
var search = $("#searchBar").one("click", function() {
search.keyup(function (e) {
if (e.keyCode == 13) {
search.trigger("enterKey");
}
})
.on("enterKey", function (e) {
searchFunction();
});
})
})

call different events based on user input style javascript

I have a div which contains an input element to enter some values. These values are added just above the div as a list element upon pressing enter or onFocusOut event. To this point it is fine. But if user types some value and does not press enter and directly clicks on save button, the onFocusOut function for that div should not be called. Instead it should take that typed value and call some save function. Do you have any suggestion on how to detect it?
My code snippet is here
JS:
divInput.onkeypress = function (event){
return someTestFunc();
}
divInput.tabIndex="-1";
$(divInput).focusout(function (e) {
if ($(this).find(e.relatedTarget).length == 0) {
addToList();
}
});

It is not a very delicate solution, but you could use a setTimeout before adding the item to the list and clear the setTimeout on save.button click.
Try this:
var $saveButton = $('#exampleButton')[0],
$divInput = $('#exampleInput')[0],
timedEvent = -1;
$($saveButton).on('click', function(event){
if(timedEvent) {
clearTimeout(timedEvent)
}
alert('not add to list & save');
})
$divInput.tabIndex="-1";
$($divInput).on('focusout', function(e) {
timedEvent = window.setTimeout(function() {
if ($(this).find(e.relatedTarget).length == 0) {
alert('add to list');
}
}, 200);
});
Check this working fiddle

Fire function only once if another has already been fired

I have created two functions. To keep it simple lets take for an example the following:
I got functions firing different events for the same objects. You can activate them using your keyboard arrows
$("body").keydown(function(e) {
if (event.which == 39) open_second_layer();
});
$("body").keydown(function(e) {
if (event.which == 37) open_first_layer();
});
As soon as I have fired one function and press the same key again it fires the animation one more time (unnecessarily).
Because of that as soon as the function open_second_layer has been fired, it should not be able to be fired again, until open_first_layer is fired again. The same should be the case the other way round.
I found .bind and .when as possible solutions, but can't figure out how to use them the right way for that case. I appreciate every suggestions or keywords to google.

You can keep a state variable and track when changes are made to it:
var state_changed = (function() {
var current = null;
return function(state) {
if (state == current) {
return false;
}
current = state;
return true;
};
}());
function open_first_layer()
{
if (!state_changed(1)) {
return;
}
// rest of code
}
function open_second_layer()
{
if (!state_changed(2)) {
return;
}
// rest of code
}
$("body").keydown(function(e) {
if (event.which == 39) {
open_second_layer();
} else if (event.which == 37) {
open_first_layer();
}
});

You can use jQuery's one().
In your first click handler, you bind the second one.
In your second click handler, you bind the first one.
sample
<div id=activate-first>first</div>
<div id=activate-second style="display:none;">second</div>
$(document).ready(function () {
function slide_first(){
$('#activate-first').show();
$('#activate-second').hide();
$('#activate-second').one('click', slide_first);
};
function slide_second(){
$('#activate-first').hide();
$('#activate-second').show();
$('#activate-first').one('click', slide_second);
};
$('#activate-first').one('click', slide_second);
$('#activate-second').one('click', slide_first);
});

Put the other function inside slide_first, like:
function slide_first(){
// other code
$('#activate_second').one('click', slide_second);
}
$('#activate_first').one('click', slide_first);
or use an Anonymous function to do the same:
$('#activate_first').one('click', function(){
// slide_first code here
$('#activate_second').one('click', function(){
// slide_second code here
});
});
Maybe your really want:
function recursiveSlider(){
$('#activate_first').one('click', function(){
// slide_first code here
$('#activate_second').one('click', function(){
// slide_second code here
recursiveSlider();
});
});
}
recursiveSlider();

This is a perfect use case for delegation. You have a single click event, and whenever the event happens, you determine what has been clicked, and you take action accordingly:
$(document.body).on("click", function(ev) {
var $targ = $(ev.target);
if ($targ.is('#button_1')) {
// someone clicked #button_1
}
if ($targ.is('.page-2 *')) {
// something inside of .page-2 was clicked!!
}
});
UPDATE: now the OP has included more code, I'm not sure the issue is - there's no need to bind and unbind events...
http://jsfiddle.net/ryanwheale/uh63rzbp/1/
function open_first_layer() {
$('#first_panel').addClass('active');
$('#second_panel').removeClass('active');
}
function open_second_layer() {
$('#first_panel').removeClass('active');
$('#second_panel').addClass('active');
}
// one event === good
$("body").keydown(function(e) {
if (event.which == 39) open_second_layer();
if (event.which == 37) open_first_layer();
});
... or if you're trying to build a slider, I suggest changing your naming convention:
http://jsfiddle.net/ryanwheale/uh63rzbp/2/
var current_layer = 1,
$all_layers = $('[id^="panel_"]'),
total_layers = $all_layers.length;
function move_layer (dir) {
current_layer += dir;
if (current_layer < 1) current_layer = total_layers;
else if (current_layer > total_layers) current_layer = 1;
$all_layers.removeClass('active');
$('#panel_' + current_layer).addClass('active');
}
// one event === good
$("body").keydown(function(e) {
if (event.which == 39) move_layer(1);
if (event.which == 37) move_layer(-1);
});
move_layer(0);

How to use keyboard events to change the image for a slide-show

I'm trying to use mouse events in a slideshow in Javascript. How do I use the keyup event to change the image? If I use KeyUp in the text box it's working, but when I use it on the image below it doesn't work.
<script>
var image=document.getElementById("x")
image.addEventListener("keyup",displaykey,false)
image.addEventListener("click",previous,false)
image.addEventListener("contextmenu",next,false)
var step=1;
function previous()
{
step--;
if(step==0)
{
step=3;
}
document.slide.src=eval("show"+step+".src")
}
function next(event)
{
step++;
if(step==4)
{
step=1;
}
document.slide.src=eval("show"+step+".src")
event.preventDefault()
}
function displaykey(event)
{
console.log(e.target)
var unicode=e.keyCode
event.preventDefault();
if((unicode==33)||(unicode==38))
{
previous();
}
else if((unicode==40)||(unicode==34))
{
next();
}
}
</script>

You can try to use JQuery hotkeys plugin that
lets you easily add and remove handlers for keyboard events anywhere in your code supporting almost any key combination.

Since you are wanting to change the image on a keyup event and only use javascript the following code will work :
document.onkeyup = function(e) {
var image = document.getElementById('x');
//Left Key
if (event.keyCode == 37) {
previous();
//Right Key
} else if (event.keyCode == 39) {
next();
}
}
This code will execute the onclick event of the image you have whenever the user lifts the left or right directional keys. You can change the keycodes and add more should you wish.

function displaykey(event) {
console.log(e.target)
var unicode=e.keyCode
event.preventDefault();
if((unicode==33)||(unicode==38)) {
previous();
} else if((unicode==40)||(unicode==34)) {
next();
}
}
I think the error occurs here as you passed event in argument and is then using e instead of event.