If checkbox is checked condition Javascript

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I have a simple checkbox and am trying to determine if it is checked or not in JS.

var checkbox = document.getElementById('checkbox').checked;
console.log(checkbox);
if(checkbox == 'true'){
    console.log('test');
}

My first console.log() returns true or false as expected, however even if it never goes into the if() statement even when it is true.

I am not sure what I am missing? Any help or assistance with this would be greatly appreciated.

To check if a checkbox is checked, you don't test it against "true" (String). Instead, you examine its checked property to see if that is true (Boolean). This becomes even easier to deal with because an if condition always tests for "truthy" values in the first place, so you don't really need to add that you are testing for true.

var checkbox = document.getElementById('checkbox');
// Interpreted as "Is it true that checkbox.checked == true"?
if(checkbox.checked){
    console.log('test');
}

var checkbox = document.getElementById('checkbox').checked;
// Interpreted as "Is checkbox.checked true"?
if(checkbox.checked){
    console.log('test');
}

But, there is no need to check if a checkbox is checked. Just query the document for only checked checkboxes and whatever is returned is what you work with.

.querySelector() and .querySelectorAll() allow you to pass any valid CSS selector to them. .querySelector() will return the first element that matches the selector and .querySelectorAll() will return a node list (HTML Collection) of all matching elements.

document.querySelector("button").addEventListener("click", function(){
  // Query for only the checked checkboxes and put the result in an array
  let checked = Array.prototype.slice.call(document.querySelectorAll("input[type='checkbox']:checked"));
  console.clear();
  // Loop over the array and inspect contents
  checked.forEach(function(cb){
    console.log(cb.value);
  });
});
<input type="checkbox" value="one"> One 
<input type="checkbox" value="two"> Two 
<input type="checkbox" value="three"> Three 
<input type="checkbox" value="four"> Four

<button>Get Checked Checkboxes</button>

How To Display Text when a Checkbox is Checked, var text = document.getElementById("text"); // If the checkbox is checked, display the output text if (checkBox.checked == true){ text.style.display = "block"; } else { .checked property returns a boolean indicating whether the element is checked or not. So your function would be something like .. Checkout the javascript tag information: Unless a tag for a framework/library is also included, a pure JavaScript answer is expected.

Let's see your code:

var checkbox = document.getElementById('checkbox').checked;
console.log(checkbox);
if(checkbox == 'true'){
    console.log('test');
}
You are giving the checkbox name to a variable holding a boolean value

Change to

var checkbox = document.getElementById('checkbox');
You are comparing boolean to string
true == 'true'

is always false. Change to

if (checkbox.checked) {
    console.log('test');
}
You are using the id of checkbox

You probably have several checkboxes with the same id. If that is the case, change it to be a class and use

document.getElementsByClassName

instead. You will get an array and you will have to iterate it with a cycle.

HTML DOM Input Checkbox checked Property, Value, Description. true|false, Specifies whether a checkbox should be checked or not. true - The checkbox is checked; false - Default. The checkbox is not  Find out how to check the state of a checkbox, looking if it is checked or not, using JavaScript Published Sep 08, 2019 Inspect the checked property of the element.

Condition must be equal to true without the quotes, otherwise its comparing to a string.

How Do I Check If JavaScript Checkbox is Checked?, JavaScript Check If Checkbox is Checked Demo is checked. It also allows us to add any condition we want within our if and else statement  This tutorial will help you with JavaScript code with jQuery, which check that checkbox is checked or not and perform operations based on that. This useful before submitting any form to check if any checkbox is checked or not. JavaScript Code :-Below is the JavaScript code which check that checkbox (id: checkBox1) is selected or not.

You are trying to compare a boolean to a string. What you want is to compare bool to bool as you want.

var checkbox = document.getElementById('checkbox').checked;
console.log(checkbox);
if(checkbox == true){
    console.log('test');
}

How to Check a Checkbox is Checked or Not Using jQuery, Topic: JavaScript / jQueryPrev|Next. Answer: Use the jQuery prop() method & :​checked selector to track the status of checkboxes whether it is checked or not using the jQuery prop() method as It works pretty well in all conditions because every checkbox has a checked property else if($(this).prop("checked") == false​){ JavaScript function to check if multiple CheckBoxes are checked or not. When the Check Button is clicked, the Validate function gets called. Inside the Validate function, first the HTML Table is referenced and then all the CheckBoxes inside it are referenced.

You are trying to check if boolean variable is equial to string "true" Just check

if(checkbox) {...}

Checking if a checkbox is Checked or not in js - JavaScript, getElementsByTagName("input"); var i = 0; for(i=0;i<divEls.length;i++){ if (divEls[i]​.type == "checkbox"){ if(divEls[i].checked == true) alert('checked'); else alert('not  JavaScript checkbox checked object and property As you can see from the above examples, including checkboxes in your web pages is easy. The checked property allows you to set the checkbox initial value or return the value if the user has selected the checkbox or not.

How to Check and uncheck all using jQuery and JavaScript, If checkbox checked state is TRUE then loop through all options of the select option').each(function() { $(this).prop('selected',true); }); }else{ // Deselect All  Check And Uncheck Checkboxes Using JavaScript. Thats all, this is how to check and uncheck checkboxes using JavaScript.You can customize this code further as per your requirement. And please feel free to give comments on this tutorial.

Using The HTML Checkbox & Managing The Check State With , Managing checkboxes in HTML, specifically using JavaScript and jQuery When checked is added to the checkbox element the browser will render it + interests); } else { addToLog("**NOT ENOUGH** interests selected: " +  Login Form Signup Form Checkout Form Contact Form Social Login Form Register Form Form with Icons Newsletter Stacked Form Responsive Form Popup Form Inline Form Clear Input Field Hide Number Arrows Copy Text to Clipboard Animated Search Search Button Fullscreen Search Input Field in Navbar Login Form in Navbar Custom Checkbox/Radio Custom Select Toggle Switch Check Checkbox Detect Caps Lock Trigger Button on Enter Password Validation Toggle Password Visibility Multiple Step Form Autocomplete

How to check if Checkbox is Checked or not using Plain JavaScript, You can use plain JavaScript methods to check if a checkbox or multiple checkboxes So, if a checkbox is checked, the property returns true, or else its false. Definition and Usage. The checked property sets or returns the checked state of a checkbox. This property reflects the HTML checked attribute.

Comments
  • but does this answer his question? it's just saying "no no im changing all your code for my professional standpoint!" lol. in your defence it is a bad question...
  • upvoted but this will probs be locked anyway i'd say. good stuff
  • @ScottMarcus .getElementById() will return node, .getElementById().checked will return boolean, look closer in OP's code
  • you have caused a lot of commotion for something so simple... have a good day my dude. happy coding <3
  • Please see my answer. You don't need to be testing for checked checkboxes in the first place.