Think of it as a single-lane, one-way road. Most code is processed and loaded in the browser through what is known as the main thread. Often a page will end up loading resources, such as JavaScript and CSS, containing code that isn’t actually needed to build the page in question as a result, page load speed increases needlessly. Let btn = document.querySelector("button") įor (var i = 0 i < checkboxes.When you visit a web page, your browser requests all of the resources it needs to build it. Let checkboxes = document.querySelectorAll("input") Inside the loop, we are setting checked property to true for each checkbox. In the event handler function, we are using for loop to loop through all the checkboxes one by one.We have attached the click event listener to the button element.We have selected the button element using the document.querySelector() method and stored it in btn variable.We have selected all the input elements using the document.querySelectorAll() method and stored them in checkboxes variable.We have also included our javascript file script.js with a script tag at the bottom.We have done some basic styling using CSS and added the link to our style.css stylesheet inside the head element. ![]() We are going to check all of them with the help of javascript.
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