Checkbox in JavaScript

Javascript check all boxes javascript code example

In the listener, do: select the table element where you want to check all boxes, e.g. by Id Use for input elements Loop over the list of inputs: If the type of the input is «checkbox», set its property to Solution 2: Finally, be wary that the popup simply does not exist while it’s closed — if you need to talk to something that’s always there, that would be a background or event page.

How to create «check all» JavaScript method

1. Create a button
2. Add an event listener to the button. In the listener, do:
   1. select the table element where you want to check all boxes, e.g. by Id
   2. Use getElementsByTagName for input elements
   3. Loop over the list of inputs:
      • If the type of the input is «checkbox», set its checked property to true

   The following functions should be self explanatory:

   function checkboxesCheckAll() < var boxes = document.getElementsByTagName('input'); var i = boxes.length; while (i--) < if (boxes[i].type == 'checkbox') boxes[i].checked = true; >> function checkboxesCheckNone() < var boxes = document.getElementsByTagName('input'); var i = boxes.length; while (i--) < if (boxes[i].type == 'checkbox') boxes[i].checked = false; >> function checkboxesCheckToggle() < var boxes = document.getElementsByTagName('input'); var i = boxes.length; while (i--) < if (boxes[i].type == 'checkbox') boxes[i].checked = !boxes[i].checked; >> 

   Or you could write it as one function and pass a parameter to check, unckeck or toggle them.

   JavaScript Form Validation, W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more.

   Problems checking all boxes on another website using Javascript for Chrome Extension

   Okay, I shockingly did not find a duplicate (and pointing one out would be appreciated), so here’s a regular answer:

   Your popup.html is its own, separate document. When you execute

   doc.getElementsByTagName('input') 

   you are searching the popup itself, and not the current active tab.

   As you’re new to extensions, it’s doubly important to carefully read the Extension Architecture overview, and even the whole overview page. But a quick TL;DR: only Content Scripts can actually interact with content of normal tabs. In a content script, document refers to an actual page open in a tab, and there your code would work.

   You already have the «activeTab» permission, so you are allowed to inject a content script in the current page after clicking on your button.

   chrome.tabs.executeScript(null, ); // null for current tab 

   Put the code that manipulates DOM in that file content.js , and use Messaging / Storage to communicate between parts of the extension.

   Finally, be wary that the popup simply does not exist while it’s closed — if you need to talk to something that’s always there, that would be a background or event page.

   How to close all dialog boxes in jquery Code Example, All Languages >> Javascript >> how to close all dialog boxes in jquery “how to close all dialog boxes in jquery” Code Answer. jquery close another dialog . javascript by Mingles444 on Feb 28 2020 Comment . 0

   JavaScript to check all boxes in page but main code «boxe» is different

   It’s not clear what you want to accomplish. Yet, here are some ideas that might help you get started.

   Your «normal code» will find and check all boxes. However, your other css selectors are overly complicated and do not select any checkboxes. To make them select checkboxes you must add input[type=checkbox] to the end of each one like so:

   #resultListControl > div > ul > li:nth-child(3) > div > div > span > span > span > label.folder-toggle-label.folder-toggle-label-in-folder input[type=checkbox] 

   And each of the selectors may (optionally) be simplified as there’s no need to list every child element selector:

   #resultListControl li:nth-child(3) label.folder-toggle-label-in-folder input[type=checkbox] 

   Have a look at the code snippet below for ideas. And having a good understanding of how selectors work might be helpful. See: MDN CSS Selectors

   If this is not what you wanted then you’ll need to add more detail to your question so that we understand it better.

   var s0 = "input[type=checkbox]"; var s1 = "#resultListControl > div > ul > li:nth-child(4) > div > div > span > span > span > label.folder-toggle-label.folder-toggle-label-not-in-folder input[type=checkbox]"; var s2 = "#resultListControl > div > ul > li:nth-child(3) > div > div > span > span > span > label.folder-toggle-label.folder-toggle-label-in-folder input[type=checkbox]"; var s3 = "#resultListControl li:nth-child(3) label.folder-toggle-label-in-folder input[type=checkbox]"; function toggle(cssSelector) < var aa = document.querySelectorAll(cssSelector); for (var i = 0; i < aa.length; i++) < aa[i].checked = !aa[i].checked; >>

   How to check all checkboxes using jQuery?, You better use some class with the dependent checkboxes so that it does not include the checkboxes you do not want. As $ (‘input:checkbox’) will select all checkboxes on the page. If your page is extended with new checkboxes then they will also get selected/un-selected. Which might not be the intended behaviour. …

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   Check all checkboxes with JavaScript

   Solution 1: With up to date browsers can use document.querySelectorAll Solution 2: From Console Dev Tools (F12) you can use query selector as you use in javascript or jQuery code. ‘$$’ — means select all items. So in order to select all checkboxes you can do following or Solution 3: To modify the accepted answer slightly, if you’re trying to check all of the boxes on some services, such as Loom.com, then you’ll need to click each one instead of just setting them to «checked» status, otherwise the functionality doesn’t work as expected.

   Check all checkboxes with JavaScript

   I want to have the first checkbox that allows me to check or uncheck all of the other boxes. Here is the code I am using:

   Though, if you want to limit this to only certain checkboxes, add a classname to them, and to the master checkbox

   The problem is you are using the same id for all the checkbox groups. An id must be unique to a page. Instead you may use the checkbox name. Since the names have [] with varying values, you can use indexOf to examine just the first part.

         >); $("#clear_all1").click(function() < var item = document.getElementsByName("item1"); for (var i=0; i < item.length; i++) < if(item[i].checked) < item[i].removeAttribute("checked"); >else < alert("Nothing to clear."); return false; >> >); $("#btnRemove1").click(function() < var items = $('.item1').is(':checked'); if(items) < window.location = "/contents?"+ $("form#form_").serialize(); >else < alert("Nothing to remove."); return false; >>); 

   It’s better to use the querySelectorAll . here is the example.

   Here is the javascript for this

   How to get all checked checkbox value in JavaScript?, A checkbox is a selection box that allows the users to make the binary choice (true or false) by checking and unchecking it. Basically, a checkbox is an icon, which is …

   How to implement «select all» check box in HTML?

   I have an HTML page with multiple checkboxes.

   I need one more checkbox by the name «select all». When I select this checkbox all checkboxes in the HTML page must be selected. How can I do this?

    function toggle(source) Toggle All 
    Bar 1 
    Bar 2 
    Bar 3 
    Bar 4 
   

   The for each. in construct doesn’t seem to work, at least in this case, in Safari 5 or Chrome 5. This code should work in all browsers:

   // Listen for click on toggle checkbox $('#select-all').click(function(event) < if(this.checked) < // Iterate each checkbox $(':checkbox').each(function() < this.checked = true; >); > else < $(':checkbox').each(function() < this.checked = false; >); > >); 

   I’m not sure anyone hasn’t answered in this way (using jQuery):

    $( '#container .toggle-button' ).click( function () < $( '#container input[type="checkbox"]' ).prop('checked', this.checked) >) 

   It’s clean, has no loops or if/else clauses and works as a charm.

   here’s a different way less code

   Javascript — Check all checkboxes vuejs, All you have to do is add your users, using their ID since that’s how you’re referencing their values with the checkbox, and add them into your selected …

   Check all Checkboxes in Page via Developer Tools

   I have a loop that creates 20 check-boxes in the same page (it creates different forms). I want via chrome developer tools to run a JavaScript without the use of any library that CHECK all check-boxes at the same time.

   This is as far as I got:

   PS: I have searched and found a lot of Questions in Stack-Overflow but none worked for me, I’ll be glad if someone could find me the correct answer.

   With up to date browsers can use document.querySelectorAll

   From Console Dev Tools (F12) you can use query selector as you use in javascript or jQuery code.

   ‘$$’ — means select all items. If you use ‘$’ instead you will get only first item.

   So in order to select all checkboxes you can do following

   $$(‘input’).map(i => i.checked = true)

   $$(‘input[type=»checkbox»‘).map(i => i.checked = true)

   To modify the accepted answer slightly, if you’re trying to check all of the boxes on some services, such as Loom.com, then you’ll need to click each one instead of just setting them to «checked» status, otherwise the functionality doesn’t work as expected.

   Here’s the code to do that:

   Please note that longer lists of checkboxes will cause the page to pause temporarily as all checkboxes get automatically clicked for you.

   You have it nearly correct. Just use

   Namely, you need to make sure that:

   1. «checked» is a string, not a variable identifier, and
   2. you index directly on aa , not aa.elements , which does not exist

   How to check if all checkboxes are unchecked, I am trying to make a function to check if all checkboxes are unchecked. I have a similar function for text boxes. As I have not worked with checkboxes much …

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   Check or Uncheck all in a group of checkbox in JavaScript

   

   If we have a series or a group of check boxes then we can provide one button to check all the checkboxes at one go and another button to uncheck all the checked buttons by using client side JavaScript. This way the user in a single attempt can check or uncheck all the buttons. Note that this is a client side JavaScript feature so JavaScript execution is to be enabled in the client browser.

   Check all checkboxes or Un check all by using single or double buttons or checkbox in JavaScript

   There are different ways to achieve this result; we can keep two buttons for this. One button will check all the checkboxes and other button will uncheck all the buttons. The same result we can achieve by using a single buttons also. We can also keep one checkbox to get the same functionality. When we check the single checkbox we can make all the checkboxes checked and by uncheck we can make all the checkboxes uncheck( Inside mailbox of hotmail.com you can see this ) . Let us start with two buttons first. One for check all and other for Uncheck all .
   Demo of Checkbox checkall uncheckall →
   Here is the JavaScript function to be kept within the head tag

     function UnCheckAll(chk) < for (i = 0; i < chk.length; i++) chk[i].checked = false ; >// End --> 

   This is the HTML code to be kept inside the body tag.

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   Managing form with backed PHP script to receive data

   After displaying a group of checkboxes having same name, we can send the data to back end scirpt ( PHP here ) for further processing. This is part of a form so other elements like text box , radio buttons etc can be added to the form.

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    Check Control  

   PHP script to receive array with selected options. Displaying the values of only checked check boxes.

   "; echo "Back to form"; $str=''; echo "
   Following elements are checked 
   "; while (list ($key,$val) = @each ($scripts)) < $str=$str. "$val,"; >echo $str; ?>

   Using JQuery

   We can get similar result by using JQuery. The advantage less code as we will be using JQuery library. Read more on Jquery Checkbox.

   Restricting user selections

   We can ask the user to select from a group of checkboxes but we can add one limit to the number of selections by user. User can change the selection but can’t exceed the limit.
   Limiting number of Checkboxes user can select →
   ← JavaScript Checkbox Reference

   

   plus2net.com

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