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'DOMException: Failed to execute 'querySelectorAll' on 'Element' when using an 'option:selected' selector

I'm running a page which throws an error at the following line:
var label = $select.find('option:selected').html() || $select.find('option:first').html() || "";
For the sake of completeness, here is the full jQuery function (country-select.js):
(function($) {
$.fn.countrySelect = function (callback) {
$(this).each(function(){
var $select = $(this);
var lastID = $select.data('select-id'); // Tear down structure if Select needs to be rebuilt
if (lastID) {
$select.parent().find('span.caret').remove();
$select.parent().find('input').remove();
$select.unwrap();
$('ul#select-options-'+lastID).remove();
}
// If destroying the select, remove the selelct-id and reset it to it's uninitialized state.
if(callback === 'destroy') {
$select.data('select-id', null).removeClass('initialized');
return;
}
var uniqueID = Materialize.guid();
$select.data('select-id', uniqueID);
var wrapper = $('<div class="select-wrapper"></div>');
wrapper.addClass($select.attr('class'));
var options = $('<ul id="select-options-' + uniqueID +'" class="dropdown-content select-dropdown country-select"></ul>'),
selectChildren = $select.children('option, optgroup'),
valuesSelected = [],
optionsHover = false;
var label = $select.find('option:selected').html() || $select.find('option:first').html() || "";
// Function that renders and appends the option taking into
// account type and possible image icon.
var appendOptionWithIcon = function(select, option, type) {
// Add disabled attr if disabled
var disabledClass = (option.is(':disabled')) ? 'disabled ' : '';
var optgroupClass = (type === 'optgroup-option') ? 'optgroup-option ' : '';
var classes = option.attr('class');
var data = option.data('phone-code');
var opt = '<li class="' + disabledClass + optgroupClass + '"><span>';
if (option.val() !== '') {
opt += '<b class="flag flag-' + option.val().toLowerCase() + '"></b>';
}
opt += '<span class="option-label">' + option.html() + '</span>';
if (data && data !== '') {
opt += '<small>' + data + '</small>';
}
opt += '</span></li>';
options.append($(opt));
};
/* Create dropdown structure. */
if (selectChildren.length) {
selectChildren.each(function() {
if ($(this).is('option')) {
appendOptionWithIcon($select, $(this));
} else if ($(this).is('optgroup')) {
// Optgroup.
var selectOptions = $(this).children('option');
options.append($('<li class="optgroup"><span>' + $(this).attr('label') + '</span></li>'));
selectOptions.each(function() {
appendOptionWithIcon($select, $(this), 'optgroup-option');
});
}
});
}
options.find('li:not(.optgroup)').each(function (i) {
$(this).click(function (e) {
// Check if option element is disabled
if (!$(this).hasClass('disabled') && !$(this).hasClass('optgroup')) {
var selected = true;
options.find('li').removeClass('active');
$(this).toggleClass('active');
$newSelect.val($(this).find('.option-label').text());
activateOption(options, $(this));
$select.find('option').eq(i).prop('selected', selected);
// Trigger onchange() event
$select.trigger('change');
if (typeof callback !== 'undefined') callback();
}
e.stopPropagation();
});
});
// Wrap Elements
$select.wrap(wrapper);
// Add Select Display Element
var dropdownIcon = $('<span class="caret">▼</span>');
if ($select.is(':disabled'))
dropdownIcon.addClass('disabled');
// escape double quotes
var sanitizedLabelHtml = label.replace(/"/g, '"');
var $newSelect = $('<input type="text" class="select-dropdown" readonly="true" ' + (($select.is(':disabled')) ? 'disabled' : '') + ' data-activates="select-options-' + uniqueID +'" value="'+ sanitizedLabelHtml +'"/>');
$select.before($newSelect);
$newSelect.before(dropdownIcon);
$newSelect.after(options);
// Check if section element is disabled
if (!$select.is(':disabled')) {
$newSelect.data('constrainwidth', false)
$newSelect.dropdown({'hover': false, 'closeOnClick': false});
}
// Copy tabindex
if ($select.attr('tabindex')) {
$($newSelect[0]).attr('tabindex', $select.attr('tabindex'));
}
$select.addClass('initialized');
$newSelect.on({
'focus': function (){
if ($('ul.select-dropdown').not(options[0]).is(':visible')) {
$('input.select-dropdown').trigger('close');
}
if (!options.is(':visible')) {
$(this).trigger('open', ['focus']);
var label = $(this).val();
var selectedOption = options.find('li').filter(function() {
return $(this).find('.option-label').text().toLowerCase() === label.toLowerCase();
})[0];
activateOption(options, selectedOption);
}
},
'click': function (e){
e.stopPropagation();
}
});
$newSelect.on('blur', function() {
$(this).trigger('close');
options.find('li.selected').removeClass('selected');
});
options.hover(function() {
optionsHover = true;
}, function () {
optionsHover = false;
});
// Make option as selected and scroll to selected position
var activateOption = function(collection, newOption) {
if (newOption) {
collection.find('li.selected').removeClass('selected');
var option = $(newOption);
option.addClass('selected');
options.scrollTo(option);
}
};
// Allow user to search by typing
// this array is cleared after 1 second
var filterQuery = [],
onKeyDown = function(e){
// TAB - switch to another input
if(e.which == 9){
$newSelect.trigger('close');
return;
}
// ARROW DOWN WHEN SELECT IS CLOSED - open select options
if(e.which == 40 && !options.is(':visible')){
$newSelect.trigger('open');
return;
}
// ENTER WHEN SELECT IS CLOSED - submit form
if(e.which == 13 && !options.is(':visible')){
return;
}
e.preventDefault();
// CASE WHEN USER TYPE LETTERS
var letter = String.fromCharCode(e.which).toLowerCase(),
nonLetters = [9,13,27,38,40];
if (letter && (nonLetters.indexOf(e.which) === -1)) {
filterQuery.push(letter);
var string = filterQuery.join(''),
newOption = options.find('li').filter(function() {
return $(this).text().toLowerCase().indexOf(string) === 0;
})[0];
if (newOption) {
activateOption(options, newOption);
}
}
// ENTER - select option and close when select options are opened
if (e.which == 13) {
var activeOption = options.find('li.selected:not(.disabled)')[0];
if(activeOption){
$(activeOption).trigger('click');
$newSelect.trigger('close');
}
}
// ARROW DOWN - move to next not disabled option
if (e.which == 40) {
if (options.find('li.selected').length) {
newOption = options.find('li.selected').next('li:not(.disabled)')[0];
} else {
newOption = options.find('li:not(.disabled)')[0];
}
activateOption(options, newOption);
}
// ESC - close options
if (e.which == 27) {
$newSelect.trigger('close');
}
// ARROW UP - move to previous not disabled option
if (e.which == 38) {
newOption = options.find('li.selected').prev('li:not(.disabled)')[0];
if(newOption)
activateOption(options, newOption);
}
// Automaticaly clean filter query so user can search again by starting letters
setTimeout(function(){ filterQuery = []; }, 1000);
};
$newSelect.on('keydown', onKeyDown);
});
function toggleEntryFromArray(entriesArray, entryIndex, select) {
var index = entriesArray.indexOf(entryIndex),
notAdded = index === -1;
if (notAdded) {
entriesArray.push(entryIndex);
} else {
entriesArray.splice(index, 1);
}
select.siblings('ul.dropdown-content').find('li').eq(entryIndex).toggleClass('active');
// use notAdded instead of true (to detect if the option is selected or not)
select.find('option').eq(entryIndex).prop('selected', notAdded);
setValueToInput(entriesArray, select);
return notAdded;
}
function setValueToInput(entriesArray, select) {
var value = '';
for (var i = 0, count = entriesArray.length; i < count; i++) {
var text = select.find('option').eq(entriesArray[i]).text();
i === 0 ? value += text : value += ', ' + text;
}
if (value === '') {
value = select.find('option:disabled').eq(0).text();
}
select.siblings('input.select-dropdown').val(value);
}
};
$(function() {
$('.js-country-select').countrySelect();
});
$(document).on('change', '[data-country-select]', function() {
var target = 'select' + $(this).data('country-select');
var val = $(this).val();
var label = 'State';
var options = [
'<option value="" selected="" disabled="">Select State</option>'
];
if (val !== '') {
var country = window.__COUNTRIES[val];
var subdivisions = country.subdivisions;
var keys = Object.keys(subdivisions);
label = country.subdivisionName;
options = [
'<option value="" selected="" disabled="">Select ' + label + '</option>'
];
keys = keys.sort(function(a, b) {
var valA = subdivisions[a].toLowerCase();
var valB = subdivisions[b].toLowerCase();
if (valA < valB) return -1;
if (valA > valB) return 1;
return 0;
});
keys.forEach(function(key) {
options.push('<option value="' + key + '">' + subdivisions[key] + '</option>');
});
$(target).removeAttr('disabled');
} else {
$(target).attr('disabled', 'disabled');
}
$(target).parents('.input-field').find('label').html(label);
$(target).val('').html(options);
$(target).select2();
});
})(jQuery);
Here is the exception that I see in debug mode:
From what I understand from Failed to execute 'querySelectorAll' on 'Element' in ExtJS 5, :selected is not part of the CSS specification.
How should I fix this? Should I use:
var label = $select.find('option').filter(':selected').html() || $select.find('option').filter(':first').html() || "";
?

Converting Phil's comment to an answer, my debugger was set to pause on all exceptions (including caught ones). I had to de-activate the 'stop sign' button shown below to make the debugger work normally again.

Toggling case on click of a button

I'm having a text area, user can type in the text area, in start it will be lower case, but once user click on the 'T(toggle)' button, what ever typing after that will change to upper case previous one will be in lower case only . If again user click on the 'T(toggle button)' what ever type after that will appear in lower case and so on. I tried but that was not successful.
<input type="button" name="toggleCase" id="toggleCase" value="T" style="width:40px;" onclick="javascript:changeCase(this);" />
<textarea tabindex="1" cols="39" rows="2" onkeydown="checkTxtCase(this);" name="titleText1"> </textarea>
JS:
function checkTxtCase(elmObj) {
setCursorToTextEnd(elmObj.id);
var txtVal = elmObj.value;
var txtLen = txtVal.length;
prevSize = txtLen;
var txtLast = txtVal.substring(txtLen - 1, txtLen);
if (textCase == 'LOWER') {
elmObj.value = txtVal.substring(0, txtLen - 1) + txtLast.toLowerCase();
} else {
elmObj.value = txtVal.substring(0, txtLen - 1) + txtLast.toUpperCase();
}
return true;
}
function setCursorToTextEnd(textControlID) {
var text = document.getElementById(textControlID);
if (text != null && text.value.length > 0) {
if (text.createTextRange) {
var FieldRange = text.createTextRange();
FieldRange.moveStart('character', text.value.length);
FieldRange.collapse();
FieldRange.select();
} else if (text.setSelectionRange) {
var textLength = text.value.length;
text.setSelectionRange(textLength, textLength);
}
}
}
var textCase = 'UPPER';
var prevSize = 0;
function changeCase() {
document.getElementById('titleText1').focus();
textCase = (textCase == 'LOWER') ? 'UPPER' : 'LOWER';
}
Any suggestion is appreciated.

var textCase = 'toLowerCase';
var pos = 0;
function changeCase() {
var textarea = document.getElementsByName('titleText1')[0];
pos = textarea.value.length;
textCase = (textCase == 'toUpperCase') ? 'toLowerCase' : 'toUpperCase';
textarea.focus();
}
function checkTxtCase(elem) {
var l = elem.value.substr(pos);
elem.value = elem.value.substr(0, pos) + l[textCase]();
}
FIDDLE

I have found out a plugin for you. Its really cool and it really works.
http://jquerybyexample.blogspot.com/2011/12/jquery-plugin-for-uppercase-lowercase.html
This will help you
I have created a fiddle for you. Check It
http://jsfiddle.net/KKX5G/2/
$('#Txt').Setcase({caseValue : 'lower'});

Auto refresh a div containing Twitter posts

I am working with Twitter APIv1.1 and currently I am trying to implement a box which will display my latest tweets. This can be seen here:
http://www.jdiadt.com/twitterv1_1feed/testindex.html
However I would like to make this so that when I tweet, the box is automatically updated. I am quite new to JQuery and Javascript so I would appreciate any advice on how I can do this. I've hear AJAX can be used for something like this. Currently I have to refresh the entire page to display any new tweets. I'd like to only refresh the box.
Here is my script: twitterfeed.js
$(document).ready(function () {
var displaylimit = 10;
var twitterprofile = "jackcoldrick";
var screenname = "Jack Coldrick";
var showdirecttweets = false;
var showretweets = true;
var showtweetlinks = true;
var showprofilepic = true;
var headerHTML = '';
var loadingHTML = '';
headerHTML += '<a href="https://twitter.com/" ><img src="http://www.jdiadt.com/twitterv1_1feed/twitteroauth/images/birdlight.png" width="34" style="float:left;padding:3px 12px 0px 6px" alt="twitter bird" /></a>';
headerHTML += '<h1>'+screenname+' <span style="font-size:13px"><a href="https://twitter.com/'+twitterprofile+'" >#'+twitterprofile+'</a></span></h1>';
loadingHTML += '<div id="loading-container"><img src="http://www.jdiadt.com/twitterv1_1feed/twitteroauth/images/ajax-loader.gif" width="32" height="32" alt="tweet loader" /></div>';
$('#twitter-feed').html(headerHTML + loadingHTML);
$.getJSON('http://www.jdiadt.com/twitterv1_1feed/get_tweets.php',
function(feeds) {
//alert(feeds);
var feedHTML = '';
var displayCounter = 1;
for (var i=0; i<feeds.length; i++) {
var tweetscreenname = feeds[i].user.name;
var tweetusername = feeds[i].user.screen_name;
var profileimage = feeds[i].user.profile_image_url_https;
var status = feeds[i].text;
var isaretweet = false;
var isdirect = false;
var tweetid = feeds[i].id_str;
//If the tweet has been retweeted, get the profile pic of the tweeter
if(typeof feeds[i].retweeted_status != 'undefined'){
profileimage = feeds[i].retweeted_status.user.profile_image_url_https;
tweetscreenname = feeds[i].retweeted_status.user.name;
tweetusername = feeds[i].retweeted_status.user.screen_name;
tweetid = feeds[i].retweeted_status.id_str
isaretweet = true;
};
//Check to see if the tweet is a direct message
if (feeds[i].text.substr(0,1) == "#") {
isdirect = true;
}
//console.log(feeds[i]);
if (((showretweets == true) || ((isaretweet == false) && (showretweets == false))) && ((showdirecttweets == true) || ((showdirecttweets == false) && (isdirect == false)))) {
if ((feeds[i].text.length > 1) && (displayCounter <= displaylimit)) {
if (showtweetlinks == true) {
status = addlinks(status);
}
if (displayCounter == 1) {
feedHTML += headerHTML;
}
feedHTML += '<div class="twitter-article">';
feedHTML += '<div class="twitter-pic"><a href="https://twitter.com/'+tweetusername+'" ><img src="'+profileimage+'"images/twitter-feed-icon.png" width="42" height="42" alt="twitter icon" /></a></div>';
feedHTML += '<div class="twitter-text"><p><span class="tweetprofilelink"><strong><a href="https://twitter.com/'+tweetusername+'/status/'+tweetid+'">'+relative_time(feeds[i].created_at)+'</span><br/>'+status+'</p></div>';
feedHTML += '</div>';
displayCounter++;
}
}
}
$('#twitter-feed').html(feedHTML);
});
//Function modified from Stack Overflow
function addlinks(data) {
//Add link to all http:// links within tweets
data = data.replace(/((https?|s?ftp|ssh)\:\/\/[^"\s\<\>]*[^.,;'">\:\s\<\>\)\]\!])/g, function(url) {
return '<a href="'+url+'" >'+url+'</a>';
});
//Add link to #usernames used within tweets
data = data.replace(/\B#([_a-z0-9]+)/ig, function(reply) {
return '<a href="http://twitter.com/'+reply.substring(1)+'" style="font-weight:lighter;" >'+reply.charAt(0)+reply.substring(1)+'</a>';
});
return data;
}
function relative_time(time_value) {
var values = time_value.split(" ");
time_value = values[1] + " " + values[2] + ", " + values[5] + " " + values[3];
var parsed_date = Date.parse(time_value);
var relative_to = (arguments.length > 1) ? arguments[1] : new Date();
var delta = parseInt((relative_to.getTime() - parsed_date) / 1000);
var shortdate = time_value.substr(4,2) + " " + time_value.substr(0,3);
delta = delta + (relative_to.getTimezoneOffset() * 60);
if (delta < 60) {
return '1m';
} else if(delta < 120) {
return '1m';
} else if(delta < (60*60)) {
return (parseInt(delta / 60)).toString() + 'm';
} else if(delta < (120*60)) {
return '1h';
} else if(delta < (24*60*60)) {
return (parseInt(delta / 3600)).toString() + 'h';
} else if(delta < (48*60*60)) {
//return '1 day';
return shortdate;
} else {
return shortdate;
}
}
});
This is the get_tweets.php script where I encode the results in a JSON format.
<?php
session_start();
require_once('twitteroauth/twitteroauth/twitteroauth.php');
$twitteruser = "jackcoldrick";
$notweets = 30;
$consumerkey="xxxxxxxxxxxxxx";
$consumersecret="xxxxxxxxxxxxxxx";
$accesstoken="xxxxxxxxx";
$accesstokensecret="xxxxxxxxxxxxxx";
function getConnectionWithAccessToken($cons_key, $cons_secret, $oauth_token, $oauth_token_secret){
$connection = new TwitterOAuth($cons_key, $cons_secret, $oauth_token, $oauth_token_secret);
return $connection;
}
$connection = getConnectionWithAccessToken($consumerkey, $consumersecret, $accesstoken, $accesstokensecret);
$tweets = $connection->get("https://api.twitter.com/1.1/statuses/user_timeline.json?screen_name=".$twitteruser."&count=".$notweets);
echo json_encode($tweets);
?>

This seems doable with your current code. Things to consider:
I'm not sure, but Twitter might have a limit on requests (I imagine it's not a huge one)
Just encapsulate the reusable parts of your code in a function called updateTweets, and call that with a setInterval. There isn't anyway to really "push" tweet updates to your JavaScript, that I know of.

I would put your update code into a function that has a SetTimeout() that does a recursive call to the new function every x seconds. An example below.
$(document).ready(function () {
// Call to your update twitter function
updateTwitter(data);
});
function updateTwitter(data) {
// do your original update twitter GET
$.getJSON('http://www.jdiadt.com/twitterv1_1feed/get_tweets.php', function () {
//... all that code
});
// Sets a timer that calls the updateTwitter function 1x a minute
setTimeout(function () { updateTwitter(data); }, 60000);
}

Text area validation in javascript for html image tag

I want to validate a text area for img tag when it is duplicated. example, if i entered the image tag with src i should enter the same source with tag again i need to show alert how it could be done. my snippet to check whether the image is there or not. but i need to do for above validation also...
function validateEditor() {
var editor_val = $('#asset_html').val(), iSrc;
// Check for empty string
if(!string_IsEmpty(editor_val)) {
// Check whether img is available
if(editor_val.match(/img/g)) {
var src_cnt = (editor_val.match(/img/g).length);
//console.log(editor_val.match(/src/g).length);
$('#asset_html_preview').html(editor_val);
for(var j = 1; j <= src_cnt; j++) {
if($('#asset_html_preview img:nth-child(1)').attr('src')) {
iSrc = $('#asset_html_preview img:nth-child(1)').attr('src');
if(iSrc.indexOf('http://') != -1) {
$('#asset_html_preview img:nth-child(' + j + ')')
.error(function() { alert('Check ur image src'); });
//break;
}
}
}
}
}
}

You may be looking for this:
var arr = {};
var $div = $('<div />').html($('textarea').val());
$div.find('img').each(function (i) {
var src = $(this).attr('src');
if (src.indexOf('http://') >= 0 && arr[src] == undefined) {
arr[src] = 'foobar';
} else if (arr[src] !== undefined) {
alert('This url `' + src + '` already exists');
} else {
alert('This url `' + src + '` is wrong');
}
});
Demo: http://jsfiddle.net/LXgWU/3/

Assuming that your var src_cnt work perfect.
var src_cnt = (editor_val.match(/img/g).length);
if(src_cnt == 1)
{
alert("Plz choose Unique Image");
return false;
}

jQuery password generator

I have the following JS code that checks a password strength and also creates a random password as well. What I want to do is edit the code so that instead of putting the generated password inside the password field it will put it inside a span tag with say an id of randompassword. In addition that I would like it so that by default there will be a random password inside the span tag and then when the user clicks the button it will generate another one. And also move the link to be next to span tag rather than the password box.
Thanks.
Here is the code:
$.fn.passwordStrength = function( options ){
return this.each(function(){
var that = this;that.opts = {};
that.opts = $.extend({}, $.fn.passwordStrength.defaults, options);
that.div = $(that.opts.targetDiv);
that.defaultClass = that.div.attr('class');
that.percents = (that.opts.classes.length) ? 100 / that.opts.classes.length : 100;
v = $(this)
.keyup(function(){
if( typeof el == "undefined" )
this.el = $(this);
var s = getPasswordStrength (this.value);
var p = this.percents;
var t = Math.floor( s / p );
if( 100 <= s )
t = this.opts.classes.length - 1;
this.div
.removeAttr('class')
.addClass( this.defaultClass )
.addClass( this.opts.classes[ t ] );
})
.after('Generate Password')
.next()
.click(function(){
$(this).prev().val( randomPassword() ).trigger('keyup');
return false;
});
});
function getPasswordStrength(H){
var D=(H.length);
if(D>5){
D=5
}
var F=H.replace(/[0-9]/g,"");
var G=(H.length-F.length);
if(G>3){G=3}
var A=H.replace(/\W/g,"");
var C=(H.length-A.length);
if(C>3){C=3}
var B=H.replace(/[A-Z]/g,"");
var I=(H.length-B.length);
if(I>3){I=3}
var E=((D*10)-20)+(G*10)+(C*15)+(I*10);
if(E<0){E=0}
if(E>100){E=100}
return E
}
function randomPassword() {
var chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!##$_+?%^&)";
var size = 10;
var i = 1;
var ret = ""
while ( i <= size ) {
$max = chars.length-1;
$num = Math.floor(Math.random()*$max);
$temp = chars.substr($num, 1);
ret += $temp;
i++;
}
return ret;
}
};
$(document)
.ready(function(){
$('#password1').passwordStrength({targetDiv: '#iSM',classes : Array('weak','medium','strong')});
});

// you can use another improved version to generate password as follows
//Define
function wpiGenerateRandomNumber(length) {
var i = 0;
var numkey = "";
var randomNumber;
while( i < length) {
randomNumber = (Math.floor((Math.random() * 100)) % 94) + 33;
if ((randomNumber >=33) && (randomNumber <=47)) { continue; }
if ((randomNumber >=58) && (randomNumber <=90)) { continue; }
if ((randomNumber >=91) && (randomNumber <=122)) { continue; }
if ((randomNumber >=123) && (randomNumber <=126)) { continue; }
i++;
numkey += String.fromCharCode(randomNumber);
}
return numkey;
}
// Call
var myKey=wpiGenerateRandomNumber(10); // 10=length
alert(myKey);
// Output
2606923083

This line:
$(this).prev().val( randomPassword() ).trigger('keyup');
is inserting the value after a click. So you can change that value to stick the password wherever you want it. For example you could change it to:
$('span#randompassword').html(randomPassword());
You could also run this when the page loads to stick something in that span right away:
$(document).ready(function(){
$('span#randompassword').html(randomPassword());
});

//Very simple method to generate random number; can be use to generate random password key as well
jq(document).ready( function() {
jq("#genCodeLnk").click( function() {
d = new Date();
t = d.getTime();
jq("#cstm_invitecode").val(t);
});
});