How to check an input has a string in JavaScript - javascript

I have this code for autocomplete in an HTML input :
$("#myinput")
.bind("keydown", function(event) {
// don't navigate away from the field on tab when selecting an item
if (event.keyCode === $.ui.keyCode.TAB
&& $(this).data("autocomplete").menu.active) {
event.preventDefault();
}
})
.autocomplete({
minLength: 0,
source: function(request, response) {
var results = [],
selectionStart = this.element[0].selectionStart
term = extractLast(request.term.substring(0, selectionStart));
if (term.length > 0) {
console.log(term);
if(/*input has string "where"*/)
results = $.ui.autocomplete.filter(table1, term);
else
results = $.ui.autocomplete.filter(table2, term);
}
response(results);
},
focus: function() {
return false; // prevent value inserted on focus
},
select: function(event, ui) {
var terms = split(this.value.substring(0, this.selectionStart));
terms.pop(); // remove the current input
terms.push(ui.item.value); // add the selected item
this.value =
$.trim(terms.join(" ") + this.value.substring(this.selectionStart)) + " ";
return false;
}
});
What I'm trying to do is if the input has string "where" in somewhere, then it will load autocomplete from table1, otherwise it will load from table2. How can I check if the input has that string? Thanks in advance.

You should use includes method.
var inputValue=$("#myinput").val();
if(inputValue.toLowerCase().includes("where")){
//rest of code
}
Another method is using indexOf method.
if(inputValue.indexOf("where")!==-1){
//rest of code
}
If you want to do this achievment using regex, you can use search method.
if(inputValue.search(/where/i)!==-1){
//rest of code
}
inputValue="awherea";
console.log(inputValue.search(/where/))

If you want the strongest browser support, use String#indexOf
if(this.value.indexOf('where') > -1) {
//doSomething
}

you can get your text value and use indexof to find it .
my_inp = $("#myinput").val();
if (my_inp.indexOf('where') > -1) {
console.log('yes');
}

Try with string#match method use the ternary operator for return true or false
And also Some of the More method
string.indexOf()
string.includes()
console.log('hello everyone'.match("hello") ? true : false)
For jquery you could use the contains() method
console.log($('p').is(':contains("hi")'))
console.log($('p').is(':contains("22")')) // not contains
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p>hello hi</p>

Related

How to match children innerText with user input using jQuery

I have the following structure:
<div id="campaignTags">
<div class="tags">Tag 1</div>
<div class="tags">Tag 2</div>
<div class="tags">Tag 3</div>
</div>
And I'm trying to match user input against the innerText of each children of #campaignTags
This is my latest attempt to match the nodes with user input jQuery code:
var value = "Tag 1";
$('#campaignTags').children().each(function(){
var $this = $(this);
if(value == $(this).context.innerText){
return;
}
The variable value is for demonstration purposes only.
A little bit more of context:
Each div.tags is added dynamically to div#campaignTags but I want to avoid duplicate values. In other words, if a user attempts to insert "Tag 1" once again, the function will exit.
Any help pointing to the right direction will be greatly appreciated!
EDIT
Here's a fiddle that I just created:
http://jsfiddle.net/TBzKf/2/
The lines related to this question are 153 - 155
I tried all the solutions, but the tag is still inserted, I guess it is because the return statement is just returning the latest function and the wrapper function.
Is there any way to work around this?
How about this:
var $taggedChild = $('#campaignTags').children().filter(function() {
return $(this).text() === value;
});
Here's a little demo, illustrating this approach in action:
But perhaps I'd use here an alternative approach, storing the tags within JS itself, and updating this hash when necessary. Something like this:
var $container = $('#campaignTags'),
$template = $('<div class="tags">'),
tagsUsed = {};
$.each($container.children(), function(_, el) {
tagsUsed[el.innerText || el.textContent] = true;
});
$('#tag').keyup(function(e) {
if (e.which === 13) {
var tag = $.trim(this.value);
if (! tagsUsed[tag]) {
$template.clone().text(tag).appendTo($container);
tagsUsed[tag] = true;
}
}
});
I used $.trim here for preprocessing the value, to prevent adding such tags as 'Tag 3 ', ' Tag 3' etc. With direct comparison ( === ) they would pass.
Demo.
I'd suggest:
$('#addTag').keyup(function (e) {
if (e.which === 13) {
var v = this.value,
exists = $('#campaignTags').children().filter(function () {
return $(this).text() === v;
}).length;
if (!exists) {
$('<div />', {
'class': 'tags',
'text': v
}).appendTo('#campaignTags');
}
}
});
JS Fiddle demo.
This is based on a number of assumptions, obviously:
You want to add unique new tags,
You want the user to enter the new tag in an input, and add on pressing enter
References:
appendTo().
filter().
keyup().
var value = "Tag 1";
$('#campaignTags').find('div.tags').each(function(){
if(value == $(this).text()){
alert('Please type something else');
}
});
you can user either .innerHTML or .text()
if(value === this.innerHTML){ // Pure JS
return;
}
OR
if(value === $this.text()){ // jQuery
return;
}
Not sure if it was a typo, but you were missing a close } and ). Use the jquery .text() method instead of innerText perhaps?
var value = "Tag 1";
$('#campaignTags').find(".tags").each(function(){
var content = $(this).text();
if(value === content){
return;
}
})
Here you go try this: Demo http://jsfiddle.net/3haLP/
Since most of the post above comes out with something here is another take on the solution :)
Also from my old answer: jquery - get text for element without children text
Hope it fits the need ':)' and add that justext function in your main customised Jquery lib
Code
jQuery.fn.justtext = function () {
return $(this).clone()
.children()
.remove()
.end()
.text();
};
$(document).ready(function () {
var value = "Tag 1";
$('#campaignTags').children().each(function () {
var $this = $(this);
if (value == $(this).justtext()) {
alert('Yep yo, return');)
return;
}
});
//
});

Filtering html fields with jQuery

I have read about filtering table plugins. What I'm searching for is like this popup window.
(source: staticflickr.com)
When the user starts typing in the search-box, the relevant channel/category (as selected on previous dropdown box) should filter up. Also some animated loading action should happen while the filter process is going on.
I am looking for jQuery plugins which will make my filter-job easier to implement.
I think it is to ambigous to have a plugin for it. Just do something like this:
function filter($rows, category, search) {
$rows.each(function() {
if (category == ($("td:eq(2)", this).text() || category == "all") && (search. === "" || $("td:eq(1)", this).text().indexOf(search) !== -1) {
$(":checkbox", this).removeAttr("disabled");
$(this).show();
}
else
$(this).hide(function(){
$(":checkbox", this).attr("disabled", "disabled");
});
});
}
$("select.category").change(function() {
filter ($(this).closest("form").find("tr"), $(this).val(), $(this).closest("form").find("input.search").val());
});
$("input.search").keyUp(function() {
filter ($(this).closest("form").find("tr"), $(this).closest("form").find("select.catagory").val(), $(this).val());
});
You may need to make a few adjustments in order to make it work with the exact format of html.
Update to make it into a PLUGIN
$.fn.filter_table = function(options) {
options = $.extend(options, {
show: $.noop(), //Callback when a row get shown
hide: $.noop(), // Callback when a row gets hidden
entries: "table tr", // Selector of items to filter.
map: {} //Required parameter
//TODO Add default ajustment parameters here to remove ambiguity and assumptions.
});
return this.each(function() {
var form = this;
function each(callback) {
for (var selector in options.map) {
var check = options.map[selector];
$(selector, form).each(function(){
callback.call(this, check);
});
}
}
function show(row) {
if (!$(row).is(":visible")) {
options.show.apply(row);
$(row).show();
}
}
function hide(row) {
if ($(row).is(":visible"))
$(row).hide(options.hide);
}
function run_filter() {
$(options.entries, form).each(function() {
var row = this, matched = true;
each(function(check) {
matched &= check.call(this, row);
});
matched ? show(this) : hide(this);
})
}
//Bind event handlers:
each(function() {
$(this).bind($(this).is(":text") ? "keyup" : "change", run_filter);
});
});
};
You can use this plugin as follows:
$("form").filter_table({
map: {
//These callback define if a row was matched:
"select.category": function(row) {
//this refers to the field, row refers to the row being checked.
return $(this).val() == "all" || $(this).val() == $("td:eq(2)", row).text();
},
"input.search": function(row) {
return $(this).val() == "" || $(this).val() == $("td:eq(1)", row).text();
}
},
entries: "tr:has(:checkbox)", //Filter all rows that contain a checkbox.
show: function() {
$(":checkbox", this).removeAttr("disabled");
},
hide: function() {
$(":checkbox", this).attr("disabled", "disabled");
}
});
Okay it should work once it was debugged. I haven't tested it. I think that part is up to you.
If your HTML looks like this:
<form id="filterForm">
<input type="text" id="filterBox">
<input type="submit" value="Filter">
</form>
<div id="checkboxContainer">
<label><input type="checkbox" id="checkbox123"> Checkbox 123</label>
</div>
You could do something like...
//Set variables so we only have to find each element once
var filterForm = $('#filterForm');
var filterBox = $('#filterBox');
var checkboxContainer = $('#checkboxContainer');
//Override the form submission
filterForm.submit(function() {
//Filter by what the label contains
checkboxContainer.find('label').each(function() {
//If the value of filterBox is NOT in the label
if ($(this).indexOf(filterBox.val()) == -1) {
//Hide the label (and the checkbox since it's inside the label)
$(this).hide();
} else {
//Show it in case it was hidden before
$(this).show();
}
});
//Prevent the form from submitting
return false;
});
You can use this tablesorterfilter plugin to achieve what you need
Working Fiddle
And also please have a look at http://datatables.net/
There are many options out there. Here is a good place to start: http://www.wokay.com/technology/32-useful-jquery-filter-and-sort-data-plugins-62033.html
Filtering like this isn't incredibly complicated. It may be worth looking at the source of a couple plugins that come close to what you want and then try to write your own. You'll learn a lot more if you do it yourself!

Counting the number of input's and textarea's with data

I have a script that only works in jquery 1.7.2. I'm also getting a lot of conflicts with this script.
Is there an alternative to this approach? I'm trying to count the number of input's and textarea's that have data typed inside them. I just need a number.
Here is my current script:
$('#form_register').on('keyup', function() {
var number = $('#form_register').find('input, textarea')
// filter out every empty input/textarea
.filter(function() {
return $(this).val() != '';
}).length;
$('.inputCount').val('There are ' + number + ' empty input fields');
console.log('test');
});​
I'd use the change handler too, to prevent someone paste the text inside a field.
EDIT :
To count upwards as you asked in your comment:
jsBin demo
$('#form_register').on('keyup change', function() {
var number = 0;
$(this).find('input, textarea').each(function(){
if( this.value !== ''){
$('.input_count').val(number++);
}
});
});
To redo to count downwards (DEMO) just use === and exclude the print from the each function:
if( this.value === ''){
number++;
}
$('.input_count').val(number);
If you have more issues, try to wrap the code into:
(function($){ // remap '$' to jQuery
// CODE HERE
})(jQuery);

How to auto add string "http://' when user input in the textbox by jquery

I want to automatically prepend http:// to the value of a textbox.
For example, cateno.no should become http://cateno.no, but http://google.com should stay the same.
Here's the HTML:
<input id="urlBanner" type ="text" style ="width:450px;" maxlenght="100" />
You could bind to the change event for the input and evaluate the value:
$(document).ready(function () {
$("#urlBanner").change(function() {
if (!/^http:\/\//.test(this.value)) {
this.value = "http://" + this.value;
}
});
});
Example: http://jsfiddle.net/andrewwhitaker/gnHLz/
Or, if you don't like regular expressions you could use indexOf:
$(document).ready(function () {
$("#urlBanner").change(function() {
if (this.value.indexOf("http://") !== 0) {
this.value = "http://" + this.value;
}
});
});
Example: http://jsfiddle.net/andrewwhitaker/fYRUW/
I would make a slight alteration to Andrew Whitaker's regex example to account for https urls, otherwise https://test.com will be prepended with http:// and look like http://https://test.com
$(document).ready(function () {
$("#urlBanner").change(function() {
if (!/^https*:\/\//.test(this.value)) {
this.value = "http://" + this.value;
}
});
});
Handle some event, probably change, and prepend the string if the current value doesn't match a regular expression:
$(document).ready(function() {
$('#urlBanner').bind('change', function() {
var $this = $(this);
if(!/^http:\/\//.test($this.val()) {
$this.val('http://' + $this.val);
}
});
});
jQuery.validator.addMethod("complete_url", function(val, elem, params) {
// if no url, don't do anything
if (val.length == 0) { return true; }
// if user has not entered http:// https:// or ftp:// assume they mean http://
if(!/^(https?|ftp):\/\//i.test(val)) {
val = 'http://'+val; // set both the value
$(elem).val(val); // also update the form element
}
else if(/^(https?|ftp):\/\//i.test(val)) { // set both the value
$(elem).val(val); // also update the form element
}
// now check if valid url
return /^(https?|ftp):\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:)*#)?(((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?)(:\d*)?)(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|#)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|#)*)*)?)?(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|#)|[\uE000-\uF8FF]|\/|\?)*)?(\#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|#)|\/|\?)*)?$/i.test(val);}, 'Please enter valid URL');

jQuery - Find any input with a given class that has no value

I have a (very) basic validation script. I basically want to check for any inputs with class .required to see if there values are a) blank or b) 0 and if so, return false on my form submit. This code does not seem to return false:
function myValidation(){
if($(".required").val() == "" || $(".required").val() == 0){
$(this).css({ backgroundColor:'orange' }) ;
return false;
}
}
Appending this function to my onSubmit handler of my form is not returning any results. Any light shed on this matter will be appreciated.
I am basically after a function that iterates through all the inputs with class .required, and if ANY have blank or 0 values, return false on my submit and change the background colour of all badly behaved inputs to orange.
Your code currently gets the .val() for the first .required, from the .val() documentation:
Get the current value of the first element in the set of matched elements.
You need to filter through each one individually instead, like this:
function myValidation(){
var allGood = true;
$(".required").each(function() {
var val = $(this).val();
if(val == "" || val == 0) {
$(this).css({ backgroundColor:'orange' });
allGood = false;
}
});
return allGood;
}
Or a bit more compact version:
function myValidation(){
return $(".required").filter(function() {
var val = $(this).val();
return val == "" || val == 0;
}).css({ backgroundColor:'orange' }).length === 0;
}
Try this jQuery selector:
$('.required[value=""], .required[value=0]')
You could also do it by defining your own custom jQuery selector:
$(document).ready(function(){
$.extend($.expr[':'],{
textboxEmpty: function(el){
return ($(el).val() === "");
}
});
});
And then access them like this:
alert($('input.required:textboxEmpty').length); //alerts the number of input boxes in your selection
So you could put a .each on them:
$('input.required:textboxEmpty').each(function(){
//do stuff
});

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