how to find element html with Jquery .
in this example element html is "input"
jsfiddle
$("#her").click(function() {
var $t = $('#mee');
console.log($t.filter());
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" id="mee">
<input type="submit" value="click ici" id="her">
$(this).prev().prop('nodeName');
I believe this was the JSFiddle link - http://jsfiddle.net/sr2o412y/
<input type="text" id="mee">
<input type="submit" value="click ici" id="her" >
If you want to select a element using jquery you can use (#)id attribute or (.) class attribute or (input) html tagname.
In this case if you want to take the data from text element which has id => "#mee" on click if id => "#her". You can use the below code
$('#her').on('click', function(){
var textvalue = $('#mee').val();
console.log(textvalue);
});
Provide readable id and class names to identify elements properly.
Your selectors looks fine to me. In short, you can use any valid CSS selector, so both $('#her') and $('#mee') should be working in your example, as you have HTML elements with those ids:
$('#her').click(function() {
var $t = $('#mee');
console.log($t.val());
});
<input type="text" id="mee" />
<input type="submit" id="her" value="SUBMIT" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
If you want to select an element based on its type (tag) instead, then just remove the #. For example, to select any input element on the page you would just do:
$('input')
Or, to get just the first one:
$('input').first()
Or also:
$('input').eq(0)
You can also select elements based on type plus attribute to select specific inputs:
$('input[type="text"]')
Related
How do I identify empty textboxes using jQuery? I would like to do it using selectors if it is at all possible. Also, I must select on id since in the real code where I want to use this I don't want to select all text inputs.
In my following two code examples the first one accurately displays the value typed into the textbox "txt2" by the user. The second example identifies that there is an empty textbox, but if you fill it in it still regards it as empty. Why is this?
Can this be done using just selectors?
This code reports the value in textbox "txt2":
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<script type="text/javascript">
$(function() {
$('#cmdSubmit').click(function() {
alert($('[id=txt2]').val());
});
});
</script>
</head>
<body>
<form>
<input type="text" name="txt1" id="txt1" value="123" /><br />
<input type="text" name="txt2" id="txt2" value="" /><br />
<input type="text" name="txt3" id="txt3" value="abc" /><br />
<input type="submit" name="cmdSubmit" id='cmdSubmit' value="Send" /><br />
</form>
</body>
</html>
This code always reports textbox "txt2" as empty:
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<script type="text/javascript">
$(function() {
$('#cmdSubmit').click(function() {
if($('[id^=txt][value=""]').length > 0) {
if (!confirm("Are you sure you want to submit empty fields?")) {
if (event.preventDefault) {
event.preventDefault();
} else {
event.returnValue = false;
}
}
}
});
});
</script>
</head>
<body>
<form>
<input type="text" name="txt1" id="txt1" value="123" /><br />
<input type="text" name="txt2" id="txt2" value="" /><br />
<input type="text" name="txt3" id="txt3" value="abc" /><br />
<input type="submit" name="cmdSubmit" id='cmdSubmit' value="Send" /><br />
</form>
</body>
</html>
Another way
$('input:text').filter(function() { return $(this).val() == ""; });
or
$('input:text').filter(function() { return this.value == ""; });
or
// WARNING: if input element does not have the "value" attribute or this attribute was removed from DOM then such selector WILL NOT WORK!
// For example input with type="file" and file does not selected.
// It's prefer to use "filter()" method.
// Thanks to #AaronLS
$('input:text[value=""]');
Working Demo
code from the demo
jQuery
$(function() {
$('#button').click(function() {
var emptyTextBoxes = $('input:text').filter(function() { return this.value == ""; });
var string = "The blank textbox ids are - \n";
emptyTextBoxes.each(function() {
string += "\n" + this.id;
});
alert(string);
});
});
You could also do it by defining your own selector:
$.extend($.expr[':'],{
textboxEmpty: function(el){
return $(el).val() === "";
}
});
And then access them like this:
alert($(':text:textboxEmpty').length); //alerts the number of text boxes in your selection
$(":text[value='']").doStuff();
?
By the way, your call of:
$('input[id=cmdSubmit]')...
can be greatly simplified and speeded up with:
$('#cmdSubmit')...
As mentioned in the top ranked post, the following works with the Sizzle engine.
$('input:text[value=""]');
In the comments, it was noted that removing the :text portion of the selector causes the selector to fail. I believe what's happening is that Sizzle actually relies on the browser's built in selector engine when possible. When :text is added to the selector, it becomes a non-standard CSS selector and thereby must needs be handled by Sizzle itself. This means that Sizzle checks the current value of the INPUT, instead of the "value" attribute specified in the source HTML.
So it's a clever way to check for empty text fields, but I think it relies on a behavior specific to the Sizzle engine (that of using the current value of the INPUT instead of the attribute defined in the source code). While Sizzle might return elements that match this selector, document.querySelectorAll will only return elements that have value="" in the HTML. Caveat emptor.
$("input[type=text][value=]")
After trying a lots of version I found this the most logical.
Note that text is case-sensitive.
There are a lot of answers here suggesting something like [value=""] but I don't think that actually works . . . or at least, the usage is not consistent. I'm trying to do something similar, selecting all inputs with ids beginning with a certain string that also have no entered value. I tried this:
$("input[id^='something'][value='']")
but it doesn't work. Nor does reversing them. See this fiddle. The only ways I found to correctly select all inputs with ids beginning with a string and without an entered value were
$("input[id^='something']").not("[value!='']")
and
$("input[id^='something']:not([value!=''])")
but obviously, the double negatives make that really confusing. Probably, Russ Cam's first answer (with a filtering function) is the most clear method.
Building on #James Wiseman's answer, I am using this:
$.extend($.expr[':'],{
blank: function(el){
return $(el).val().match(/^\s*$/);
}
});
This will catch inputs which contain only whitespace in addition to those which are 'truly' empty.
Example: http://jsfiddle.net/e9btdbyn/
I'd recommend:
$('input:text:not([value])')
This will select empty text inputs with an id that starts with "txt":
$(':text[value=""][id^=txt]')
Since creating an JQuery object for every comparison is not efficient, just use:
$.expr[":"].blank = function(element) {
return element.value == "";
};
Then you can do:
$(":input:blank")
How can I get the value of the textbox?
<input class="num1" type="text" val=""><br>
<button class="show">Click</button>
this is my Js code:
var value = $('.num1').text();
$('.Click').click(function(){
$('<'p>').text(value);
});
when I clicked the "click" button I want to show in a paragraph the text that I'd input to the textbox.
Use .val() for form elements to retrieve or set its value. Also, care with typo when you set the paragraph text.
var value = $('.num1').val();
$('.show').on('click', function(){
$('p').text(value);
});
In your code there is an error: if you want to catch the click event you should use the class of the button. Another error in your code is about the single quotes you use to insert value into the <p>. And remember, is $('p'), not $('<p>').
The code should look like that:
$('.show').click(function(){
$('p').text(value);
});
You can use this code:
jQuery
$(function(){
$("form").on("submit", function(event){
event.preventDefault();
var text = $(".num1").val();
$("#outputText").text(text);
})
});
Your HTML should be something like that:
HTML
<form>
<input class="num1" type="text" val="">
<button class="show">Click</button>
</form>
<p id="outputText"></p>
Note that in this case is really important to stop the default event behavior using preventDefault().
If you are not using a form the previous code became something like that:
jQuery
$(function(){
$(".show").on("click", function(event){
var text = $(".num1").val();
$("#outputText").text(text);
})
});
HTML
<input class="num1" type="text" val="">
<button class="show">Click</button>
<p id="outputText">
</p>
The outputText div is a div I've created to show the text.
I've prepared jsfiddle1, jsfiddle2 you can use to see the code in action, I hope it helps ;-)
That would be
var value = $('.num1').val();
Use the val() operator on the input to get the value, and then you could use the following code:
Html:
<input class="num1" type="text">
<button class="show">Click</button>
<p class="output"></p>
Javascript:
$('button').click(function(){
$('.output').html($('.num1').val());
});
use .val() not .text()
$(".show").click(function(){
var value= $(".num1").val();
$(".para").text(value)
});
demo
$('.show').click(function () {
var value = $('.num1').val();
$('p').text(value);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input class="num1" type="text" val=""></input>
<button class="show">Click</button>
<p></p>
There are type mistakes
var value = $('.num1').val(); should be in click method.
Use val() instead of .text() to get the input value.
I want to pass the value of input tag as parameter(quantita) in href.
Should i use javascript to do this?Sorry for my english
Thanks
<input type="text" id="qta_field" value="${item.value}"/>update
The easiest way to do it with link and without any library:
<input type="text" id="qta_field" value="${item.value}"/>
update
To send data from an input to the server, you should use a form.
<form action="updateItem">
<input id="qta_field" name="quantita" value="${item.value}">
<input type="hidden" name="codice" value="${item.key.codice}">
<button>update</button>
</form>
set an id or a class to your <a> for example : <a id='myA'>
So you can use jQuery like this :
jQuery(document).ready(function(){
jQuery('qta_field').change(function(){
var tmpVal = jQuery('#qta_field').val();
var tmphref = jQuery('#myA').attr('href');
tmphref = tmphref+tmpVal;
jQuery('#myA').attr('href',tmphref);
});
});
You can use the document.queryselector to locate and manipulate the href attribute with js
Example:
input = document.querySelector('input');
a = document.querySelector('a');
a.setAttribute('href',a.getAttribute('href')+input.value);
<input type="text" id="qta_field" value="test"/>
update
I have 2 input tags:
<input type="text" class="mainText" id="input">
<input type="text" class="mainText">
I need to set id to the input tag that don't have id, may be with jQuery like:
if(input tag has no id){
$(".mainText").attr("id", "someInput");
}
How could I find this non id input?
Use the magic of jQuery selectors:
$('.mainText:not([id])').prop('id', 'someInput');
It will select all elements with .mainText class that does :not have attribute [id].
.has(your ID) will return false if no ID been found.
see document here: http://api.jquery.com/has/
Actually i want to create a page switcher, all i need for this is an input with type text where will be entered the number of the page, and i have the second input with type button and onclick value:
<input type="text" value="#number of the page#" />
<input type="button" onclick="_go_page_('cf_pages_form_name1','#number of the page#');" />
I cant figure it out how to take this #number of the page# and put it in onclick dynamically using javascript... please smb help!
<input type="text" id="txtPageNumber" value="2" />
<input type="button" id="btn" value="click" onclick="_go_page_('cf_pages_form_name1','#number of the page#');" />
$(document).ready(function(){
$("#btn").click(function(){
var $val = $("#txtPageNumber").val();
alert($val);
_go_page_('cf_pages_form_name1',$val);
});
});
});
Assuming number is the id of the text field.
You can get the value of the text field like this:
$('#number').val();
And pass that is the onclick event
You can use an ID on the page selector input to get the value.
function goToPage(pageNumber) {
// go to pageNumber
}
<input type="text" id="pageSelector" value="#number of the page#" />
<input type="button" onclick="goToPage($('#pageSelector').val())" />
You've tagged this with jQuery so I'm assuming you're using jQuery.
lets your input type is like this
then in jquery try something like this...
$('#pageNo').keyup(function(){
pageNo = $(this).val()
}
then pass this to your button onclick function
i will answer in "very easy to understand" without jquery:
you have to get the value of the first inputfield. this should your function do. but first the inputfield needs an id(f.g. 'number').
code in function:
var pagenumber = document.getElementById('number').value;
then you have to put the number into the url (document.href).