Javascript Jquery ScrollTop paired elements - javascript

Hello I am new to programming so please excuse my ignorance.
I have several elements that when clicked use the ScrollTop jQuery function to scroll to a specified point (in another bootstrap nav-tab). I have about 20 different elements that when clicked do this. I have resorted to writing 20 different functions that look similar to the one below. I'm sure there must be a way to store these pairs and have a single ScrollTop function that calls upon those pairs.
$('#element').click(function(e) {
e.preventDefault();
var target = $('#element2').closest('.tab-pane').attr('id');
showTab(target);
setTimeout(function() {
$('html, body, nav').animate({
scrollTop: $("#element2").offset().top -100
}, 500);
}, 500);
});
So my js file has twenty or so of this function, where "#element" and "#element2" are subbed with "#alpha" "#alpha2", "#beta" "#beta2", etc...
Should I be using an array? a class? Thanks for you time.

See Working Fiddle Here
Yes you can add same class to all element that you want fire click on them, to reduce code see HTML example :
<span class="scrollTop" id="element">element text</span>
<span class="scrollTop" id="alpha">alpha text</span>
<span class="scrollTop" id="beta">beta text</span>
Adding two lignes to javascript code:
JS :
var id = $(this).attr('id'); //Id of clicked item
var scrollToId = '#'+id+"2"; //Id of scrolled to item
After that replace static ids by dynamic ones (scrollToId, id).
FULL JS :
$('.scrollTop').click(function(e) {
e.preventDefault();
var id = $(this).attr('id'); //Id of clicked item
var scrollToId = '#'+id+"2"; //Id of scrolled to item
var target = $(scrollToId).closest('.tab-pane').attr('id');
showTab(target);
setTimeout(function() {
$('html, body, nav').animate({
scrollTop: $(scrollToId).offset().top -100
}, 500);
});
});

Try adding the class "element" to each of the items that have an element id followed by a number - no need to remove the id at this time.
Then, change the selector in your code to be:
$('.element').click(function(e) {
If you use the class name instead of the id, you'll get notified when any item with a class of "element" is clicked.
If you need to make special allowances based on which one it is - in your single function, you could then check which one you're dealing with by checking its id:
$(this).attr('id')
Good Luck!

Related

Adding and removing a class at the same time as updating a div

I am very new to JavaScript. I am trying to update a div, which works fine before the add and remove class pieces are added. The problem is when I add the class I can't seem to get it to be removed when the when the next image is clicked. I have used a remove class option, but it doesn't seem to want to work.
Any help is appreciated. Here is the code:
$('[class^="question"]').on('click', function(e) {
e.preventDefault();
var numb = this.className.replace('question', '');
$('[id^="answer"]').hide();
$('.question*').removeClass('question*selected');
$('#answer' + numb).show();
$('.question' + numb).addClass('question' + numb + 'selected');
});
Here is a link to the Fiddle I am Playing with.
Thanks.
You can keep track of your added class by defining a global variable. I created a working example in CODEPEN.
$(document).ready(function() {
var appliedClass = "container1";
var classNo = 1;
$(".buttonCon").click(function() {
if ($(".container").hasClass(appliedClass)) {
$(".container").removeClass(appliedClass);
classNo++;
if (classNo > 4) {classNo = 1;}
appliedClass = "container" + classNo;
$(".container").addClass(appliedClass);
}
});
});
I have appliedClass variable which keeps tracking of the latest added class. Every time you click on the button with .buttonCon class, this variable will be updated to the new added class. Next time, first we remove the former class. Then we added the new one. The second if statement might not be needed in your case, but in my example, I needed it to keep looping through container1 to container4 classes.
You've set yourself up with a really difficult-to-work-with class structure -- this can be a lot easier than you're making it. Give each of your "question" links the class 'question' and the unique id "question1", "question2", etc. Same for the answer nodes: class "answer" and id "answer1", "answer2" etc.
Now you can easily access all question links with $('.question') or all answers with $('.answer'), and can use the IDs to identify individual nodes as needed:
$('.question').on('click', function(e) {
e.preventDefault();
var numb = this.id.replace('question', '');
var answerNode = $('#answer'+numb);
if (answerNode.hasClass('hide')) {
// the Q they clicked on is not yet visible
$('.answer').addClass('hide'); // hide all answers
answerNode.removeClass('hide'); // show the desired one
} else {
// the Q they clicked on is already visible, so toggle it back off
answerNode.addClass('hide');
}
});
http://jsfiddle.net/647dadtj/

Making part of an Id name into a variable

I have a bunch of divs with matching ids (#idA_1 and #idB_1, #idA_2 and #idB_2, etc). In jquery I wanted to assign click functions, so that when I click an #idA it will show and hide an #idB.
Basically I want to make this:
$(".idA_x").click(function(){
$("idB_x").toggleClass("hide")
});
X would be a variable to make #idA and #idB match. I could write each individually, but that would take too much code, is there a way to make the number in the id into a variable?
Sure, you can do:
var num = 13;
addButtonListener(num);
function addButtonListener(num){
$("#idA_"+num).click(function(){
$("#idB_"+num).toggleClass("hide")
});
}
Try JQuery solution :
var x = 1;
$(".idA_" + x ).click(function(){
$(".idB_" + x ).toggleClass("hide")
});
Hope this helps.
There are many ways to achieve that, but what you probably want is to create a shared CSS class, e.g. .ids, and bind the event listener to that one:
$('.ids').click(function () {
//...
});
Then you can handle your logic in a cleaner way within the function body.
In order to make it dynamic, and not have to repeat the code for each one of your numbers, I suggest doing as follows:
First, add a class to all the div's you want to be clickable .clickable, and then use the id of the clicked event, replacing A with B in order to select the element you what to toggle the class:
$(".clickable").click(function(){
var id = $(this).attr('id');
$("#" + id.replace('A', 'B')).toggleClass("hide");
});
Or, you can also select all divs and use the contains wildcard:
$("div[id*='idA_']").click(function(){
var id = $(this).attr('id');
$("#" + id.replace('A', 'B')).toggleClass("hide");
});
This solution won't have the need to add a class to all clickable divs.
You can use attribute selector begins with to target the id's you want that have corresponding elements.
https://api.jquery.com/attribute-starts-with-selector/
Then get the value after the understore using split on the id and applying Array.pop() to remove the 1st part of the array.
http://jsfiddle.net/up9h0903/
$("[id^='idA_']").click(function () {
var num = this.id.split("_").pop();
$("#idB_" + num).toggleClass("hide")
});
Using regex would be your other option to strip the number from the id.
http://jsfiddle.net/up9h0903/1/
$("[id^='idA_']").click(function () {
var num = this.id.match(/\d+/g);
$("#idB_" + num).toggleClass("hide")
});

Select hidden elements and manipulate them with jQuery

Within a div wrapper with a class of "section", I have dozens of HTML elements repeated across the page that look like this:
<div class="section">
<div class="article"></div>
<div class="article"></div>
<div class="article"></div>
</div>
And each contains certain information inside. Now, what I'm trying to do is once the page loads, show only the first 5, hide the rest in a new div inserted with jQuery, and when this new div is clicked it will display the next five , and then the next five on click again, and so on until the end. The idea is that this new div will function as a button that will always be positioned at the end of the page and will respond to these orders I just mentioned. So far I've got this down:
$('.section').each(function () {
var $this = $(this),
$allArticles = $this.find('.article');
if ($allArticles.length > 5) {
$('<div/>').addClass('hidden-articles').appendTo(this).append($allArticles.slice(5));
$('.hidden-articles .article').hide();
}
});
And that hides all but the first five. But now for the rest of the process, I can't get it to work. I don't seem to be able to select properly those hidden div with class "article" and manipulate them to function the way I described above. I would appreciate it a lot if someone more experienced with jQuery could guide me in the right direction and maybe offer a snippet. Many thanks in advance!
You can use the :hidden and :lt selectors to get the functionality you are looking for..
$('.section').each(function() {
var $this = $(this),
$allArticles = $this.find('.article');
if ($allArticles.length > 5) {
$('<div/>').addClass('hidden-articles')
.appendTo(this).append($allArticles.slice(5));
$this.find('.hidden-articles .article').hide();
}
});
$('#show').on('click',function() {
var $hidden = $('.hidden-articles .article:hidden:lt(5)');
$hidden.show();
});​
UPDATE
// If one one element to search
var elem = '.section' ;
hideArticles(elem);
// If Multiple Elements on the page...
$('.section').each(function() {
hideArticles(this);
});
$('#show').on('click', function() {
var $hidden = $('.hidden-articles .article:hidden:lt(5)');
$hidden.show();
});
function hideArticles(elem) {
var $this = $(elem),
$allArticles = $this.find('.article');
if ($allArticles.length > 5) {
$('<div/>').addClass('hidden-articles')
.appendTo(this).append($allArticles.slice(5));
$this.find('.hidden-articles .article').hide();
}
}​
Check Fiddle

JS: Click one div, change another div value

I have a vote button I created that is contained within a .vote_div. 2 parts: .vote_num for the vote total, and .vote for the vote button. The page has a list of items so I need to make sure when the user clicks .vote, it changes the corresponding .vote_num + 1.
My JS function worked when the .vote actually was the total votes, but now I am seperating the two. How do I grab the right .vote_num on the .vote click?
Thanks!
<script>
$(".vote").click( function() {
var votes = $(this).attr('votes');
$.post(
'{% url vote %}', {
"id":this.id,
}, function(data) {});
this.className = "voted";
$(this).text(parseInt(votes) + 1);
return false;
});
</script>
<div class="vote_div">
<span class="vote_num" votes='{{host.num_votes}}'>{{host.num_votes}}</span>
<span class="vote" id="{{host.user.id}}">Vote</span>
</div>
EDIT & SOLUTION:
Got it working using $(this).parent() :
<script>
$(".vote").click( function() {
var votes = $(this).parent().find('.vote_num').attr('votes');
$.post(
'{% url vote %}', {
"id":this.id,
}, function(data) {});
this.className = "voted";
votes = parseInt(votes) + 1;
$(this).parent().find('.vote_num').text(votes);
return false;
});
</script>
try:
var votes = $(this).parent().find('.vote_num').attr('votes');
It goes to the parent of the clicked div then looks for an element with class vote_num then grabs the votes attributes.
#James answer should work, but this should give you a little more freedom to rearrange the two divs and add other elements so long as they share the parent.
To be even more robust you could do (note the 's' on "parents")
var votes = $(this).parents('.vote_div').find('.vote_num').attr('votes');
This will allow the elements to be nested arbitrarily deep as long as they only have a single parent with a class of `vote_div'.
See: http://api.jquery.com/parent/ , http://api.jquery.com/parents/ , and http://api.jquery.com/find/
if you have multiple class with vote, maybe you should use each()
$(".vote").each(function () {
var current = $(this);
current.click = function () {
// the rest of your function
}
})
Assuming I've understood the question correctly, and also assuming that your vote_num element is always the first element in the vote_div element:
var votes = $(this).siblings().eq(0).attr("votes");
Put this inside your click event handler will get the votes attribute from the first sibling element of the clicked element.
You can make this simpler if you are sure the element in question will always be directly before the clicked element:
var votes = $(this).prev().attr("votes");
var votes = $(this).attr('votes');
'votes' does not belong to class 'vote', it belongs to class 'vote_num'
so the line should be
var votes = $(".vote_num").attr('votes');
$('.vote').click(function(){
var $vote_num_obj = $(this).parent().find('.vote_num');
var new_vote_num = parseInt($vote_num_obj.attr('votes'))+1;
$vote_num_obj.attr('votes', new_vote_num);
$vote_num_obj.html(new_vote_num);
});
Put this script inside $('document').ready(function(){ ..here.. });
I suggest to change votes attribute of your span.vote_num to data-votes and change also the jquery attribute selector, this way it will be standard compliant.

Jquery Selectors for name prefixes in division

In my HTML code I have buttons 1, 2, 3 and 4 for 4 different views. I have some divs named as:
sheet(button id)+some string
So whenever I click on button 2 suppose, I want all the divisions with id=sheet2abc, id=sheet2xyz, etc to become visible and for the rest (i.e. 1, 3 and 4) the dispaly:none property should be set like for sheet1abc, sheet3abc, etc.
How can I do this via jQuery selectors?
KISS. Essentially:
$('[id^=sheet]').hide();
$('[id^=sheet'+num+']').show(); // num is a relevant value, see the example
Working example: http://jsfiddle.net/j4TzA/
I think you want to use wildcards in jQuery selectors.
This shows every div whose id starts with "sheet1":
$('div[id^=sheet1]').each(function() {
$(this).show();
});
And this hides the others:
$('div[id^=sheet]:not([id^=sheet1])').each(function() {
$(this).hide();
});
I created a fiddle to demonstrate that.
Buttons: button 1 and so on
Sheets: <div id="sheet1" class="sheet">sheet 1</div> and so on
jQuery:
$('.button').click(function(event){
event.preventDefault();
$('.sheet').hide();
$('#sheet'+$(this).attr('href')).show();
}
Next time make your question more clear.
You can filter like:
$('button').click(function() {
var $button = $(this);
$('div[id^=sheet]').each(function() {
if((new RegExp("^sheet" + $button.data('id') + ".*$")).test($(this).attr('id'))) {
$(this).show();
} else {
$(this).hide();
}
});
});
Then code buttons like:
<button data-id="1">1</button>

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