Develop Reference

clear javascript : determine which link was clicked

I have a cycle of links and I determined click event on them. And I want to define if navbar[1].clicked == true {doing something} else if navbar[2].cliked == true {doing something} etc. "By if else in " reveal functional callbackFn".
Here is the code:
var navbar = document.getElementById("navbar").getElementsByTagName("a");
for (var i = 0; i < navbar.length; i++) {
navbar[i].addEventListener('click', function() { reveal('top'); });
}
function reveal(direction) {
callbackFn = function() {
// this is the part where is running the turning of pages
classie.remove(pages[currentPage], 'page--current');
if (navbar[1].clicked == true) {
currentPage = 0;
} else if(navbar[1].clicked == true) {
currentPage = 1;
} else if(navbar[2].clicked == true) {
currentPage = 2;
} else if(navbar[3].clicked == true) {
currentPage = 3;
} else if(navbar[4].clicked == true) {
currentPage = 4;
};
classie.add(pages[currentPage], 'page--current');
};
}

This is typically a problem of closure.
You can make the following change
Here the call back function of the addEventListener is an IIFE, & in the reveal function pass the value of i
var navbar = document.getElementById("navbar").getElementsByTagName("a");
for (var i = 0; i < navbar.length; i++) {
navbar[i].addEventListener('click', (function(x) {
reveal('top',x);
}(i))};
}
In this function you will have access to
function reveal(direction,index) {
// not sure what this function is mean by, but you will have the value of `i` which is denote the clicked element
callbackFn = function() {
// this is the part where is running the turning of pages
classie.remove(pages[currentPage], 'page--current');
if (index == 1) {
currentPage = 0;
} else if (index == 1) {
currentPage = 1;
} else if (index == 2) {
currentPage = 2;
} else if (index == 3) {
currentPage = 3;
} else if (index == 4) {
currentPage = 4;
};
classie.add(pages[currentPage], 'page--current');
};
}

Here is the solution in my case.
Thank you brk for helping in any case, thanks again.
// determine clicked item
var n;
$('#navbar a').click(function(){
if($(this).attr('id') == 'a') {
n = 0;
} else if($(this).attr('id') == 'b') {
n = 1;
} else if($(this).attr('id') == 'c') {
n = 2;
} else if($(this).attr('id') == 'd') {
n = 3;
} else if($(this).attr('id') == 'e') {
n = 4;
};
});
var pages = [].slice.call(document.querySelectorAll('.pages > .page')),
currentPage = 0,
revealerOpts = {
// the layers are the elements that move from the sides
nmbLayers : 3,
// bg color of each layer
bgcolor : ['#52b7b9', '#ffffff', '#53b7eb'],
// effect classname
effect : 'anim--effect-3'
};
revealer = new Revealer(revealerOpts);
// clicking the page nav
document.querySelector("#a").addEventListener('click', function() { reveal('cornertopleft'); });
document.querySelector("#b").addEventListener('click', function() { reveal('bottom'); });
document.querySelector("#c").addEventListener('click', function() { reveal('left'); });
document.querySelector("#d").addEventListener('click', function() { reveal('right'); });
document.querySelector("#e").addEventListener('click', function() { reveal('top'); });
// moving clicked item's `n` into the function
function reveal(direction) {
var callbackTime = 750;
callbackFn = function() {
classie.remove(pages[currentPage], 'page--current');
currentPage = n;
classie.add(pages[currentPage], 'page--current');
};
revealer.reveal(direction, callbackTime, callbackFn);
}

Is this text snipper mini-plugin of mine efficient?

I am working on creating a WordPress plugin to snip overflowing multiline text and add "...". It's pretty basic for now, but I am using some for loops and am just wondering if this is the most efficient way to go about doing this without clogging resources.
(function($) {
//Praveen Prasad "HasScrollBar" function adapted http://stackoverflow.com/questions/7341865/checking-if-jquery-is-loaded-using-javascript
$.fn.hasOverflow = function() {
var elm = $(this);
var hasOverflow = false;
if ( elm.clientHeight < elm.scrollHeight ) {
hasOverflow = true;
}
return hasOverflow;
}
//http://www.mail-archive.com/discuss#jquery.com/msg04261.html
jQuery.fn.reverse = [].reverse;
$(document).ready( function() {
if ( $('.' + snipClass).length > 0 ) {
var count = 0;
for (var i = 0; i < 10000; i++) {
$('.' + snipClass).each( function () {
var el = this;
//Check for overflows
if ( el.clientHeight < el.scrollHeight) {
if ($(this).children().length > 0) { //Handle child elements
$("> *", this).reverse().each( function () {
for (var j = 0; j < 10000; j++) {
if ( $(this).text() != "" && el.clientHeight < el.scrollHeight ) {
$(this).text($(this).text().substring(0,$(this).text().length - 1));
} else {
break;
}
}
});
} else { //Handle elements with no children
$(this).text($(this).text().substring(0,$(this).text().length - 1));
}
} else { //Add '...'
count++;
}
});
//Add ... once finished
if ( count >= $('.' + snipClass).length) {
$('.' + snipClass).each( function () {
var el = this;
if ($(this).children().length > 0) { //Handle child elements
$("> *", this).reverse().each( function () {
if ( $(this).text() != "" ) {
$(this).text($(this).text().substring(0, $(this).text().length - 3) + "...");
}
});
} else { //Handle elements with no children
$(this).text($(this).text().substring(0, $(this).text().length - 3) + "...");
}
});
break;
}
}
}
});
}(jQuery));
Brief explanation: "snipClass" is the value from the textfield in the plugin's settings page. If the element in question has a wrapper that is say 200px, but its text overflows it, I keep trimming text letter by letter until it doesn't overflow anymore. I opted to go with for loops rather than intervals, because even with 1s intervals, you could see the text getting removed letter by letter, and it's much faster with the for loop. If the wrapper has any direct children (maybe a tag with elements), my plugin goes in reverse order to snip text from them until there is no overflow.

How to check the dropdowncheckboxlist based on database values

I'm using dropdowncheckboxlist, where we can select multiple values and my question is how to again check the checkbox inside dropdownCheckList based on database values. That is, I have to check multiple values while editing or updating the values. I'm using this script:
<script type="text/javascript">
$(document).ready(function () {
$("#ContentPlaceHolder1_dropdown").dropdownchecklist({
forceMultiple: true
, onComplete: function (selector) {
var values = "";
for (i = 0; i < selector.options.length; i++) {
if (selector.options[i].selected && (selector.options[i].value != "") ) {
if (values != "") values += ",";
values += selector.options[i].value;
}
}
// alert(values);
$('#<%= hidVisitorID.ClientID %>').val(values);
}
, onItemClick: function (checkbox, selector) {
var justChecked = checkbox.prop("checked");
var checkCount = (justChecked) ? 1 : -1;
for (i = 0; i < selector.options.length; i++) {
if (selector.options[i].selected) checkCount += 1;
}
if (checkCount > 9) {
alert("Industry Limit is 9");
throw "too many";
}
}
}
</script>

selections validation by value with jquery

I have 5 select fields with id's id1, id2,.. id5
and i need check if values (selected) not equal then highlight green and if equal then highlight red
but is look crazy validate each field 5 times? is posible use special functions ir validate easy than with:
if
if
if
if
I dont need a code just idea.

You can loop through each select to compare the values
$("select").change(function () {
flag = false;
var value = $(this).val();
$("select").each(function () {
if ($(this).val() != value)
flag = true;
});
if (flag)
$("select").css("color", "red");
else
$("select").css("color", "green");
});
Demo
Edit
$("select").change(function () {
var flag = true;
$("select").each(function () {
var outer = this;
$("select").not(outer).each(function () {
if ($(outer).val() == $(this).val()) {
flag = false;
return false;
}
});
});
if (flag)
$("select").css("color", "green");
else
$("select").css("color", "red");
});
Updated Fiddle
New update
I've simplified the code like this. YOu dont have to use nested loop if you do like this
$("select").change(function () {
var flag = true;
$("select").each(function () {
if ($("select").find("option:selected[value=" + this.value + "]").length > 1) {
flag = false;
return false;
}
});
if (flag)
$("select").css("color", "green");
else
$("select").css("color", "red");
});
Updated Fiddle

Try this one..
$("select").change(function(){
var selected = [];
var valiSel = [];
$('select > option:selected').each(function() {
if($(this).val() != 0){
selected.push( $(this).val() );
}
valiSel.push( $(this).val() );
});
var unique = unique12(selected);
var uniqueLength = unique.length;
var valiSelUnique = unique12(valiSel);
var selectedLength = selected.length;
if( unique.length != selected.length ){
alert( 'Two Selected value cannot be same' );
return false;
}
//return true;
});
function unique12(sel) {
var r = new Array();
o:for(var i = 0, n = sel.length; i < n; i++)
{
for(var x = 0, y = r.length; x < y; x++)
{
if(r[x]==sel[i])
{
//alert('this is a DUPE!');
continue o;
}
}
r[r.length] = sel[i];
}
return r;
}
DEMO

How to submit form only one check box is selected using java script

on edit button click a want to submit form only if one check box checked,don't submit when 0 or more than 2 check box checked
my below code is not working
$("#editbtn_id").click(function () {
var cnt = 0;
var checkbox_value = "";
$(":checkbox").each(function () {
var ischecked = $(this).is(":checked");
});
if (ischecked) {
checkbox_value += $(this).val();
cnt = cnt + 1;
if (cnt == 0 || cnt > 1) {
alert(cnt);
alert("Please select one Test case");
return false;
}
}
return false;
});
HTML
<form action="/editSingletest/{{ testcase.id }}" method="post" onsubmit="return" >
<input type="checkbox"/>
</form>

You can achieve this by following code
$("#editbtn_id").click(function(){
var cnt=0;
var checkbox_checked_count = 0;
var form_submit = false;
$(":checkbox").each(function () {
if($(this).is(":checked")) {
checkbox_checked_count++
}
});
if(checkbox_checked_count == 1) {
form_submit = true;
}
else if(checkbox_checked_count > 1) {
alert("Please select one Test case");
}
alert(form_submit)
$("form").submit();
});
Check working example here in this fiddle

Your counter is in the wrong loop, should be something like this:
$("#editbtn_id").click(function(){
var cnt=0;
var checkbox_value = "";
$(":checkbox").each(function () {
var ischecked = $(this).is(":checked");
if (ischecked){
checkbox_value += $(this).val();
cnt=cnt + 1 ;
}
});
if(cnt==0 || cnt > 1){ ... }
});

try this
$("#editbtn_id").click(function (e) {
if($('form input[type="checkbox"]:checked').length == 1){
$('form').submit();
}
else{
e.preventDefault();
}
});
for 'form' use your form selector