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How can I optimize that style.display JavaScript, I don't wanna use "count" variable, it's just a w3school example and I wonder how to optimize it without using "count" variable?

<!DOCTYPE html>
<html>
<body>

    <h2>What Can JavaScript Do?</h2>

    <p id="demo">JavaScript can hide HTML elements.</p>

    <button type="button" onclick=show()>Click Me!</button>

</body>

<script>
count = 0
function show() {
    if (count%2==0) {
        document.getElementById('demo').style.display='none'
    } else {
        document.getElementById('demo').style.display='block'
    }
    count++;

}
</script>
</html> 

You can use classList.toggle

function show() {

  document.getElementById('demo').classList.toggle('hide')

}
.hide {
  display: none;
}
<h2>What Can JavaScript Do?</h2>

<p id="demo">JavaScript can hide HTML elements.</p>

<button type="button" onclick=show()>Click Me!</button>

HTML DOM Style display Property, Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java� Optimization is a special type of JavaScript minification. These kind of minimizers not only delete unuseful white spaces, commas, comments etc. but also help to avoid ‘dead code’: Google Closure Compiler

You are basically toggling the div, so you can achieve that by writing in the following way.

function toggle() {
  if (document.getElementById('demo').style.display === 'block') {
    document.getElementById('demo').style.display='none'
  } else {
    document.getElementById('demo').style.display='block'
  }
}
<!DOCTYPE html>
<html>
<body>

<h2>What Can JavaScript Do?</h2>

<p id="demo">JavaScript can hide HTML elements.</p>

<button type="button" onclick=toggle()>Click Me!</button>

</body>

</html> 

Visual editor – Usage - Optimize Resource Hub, Use the code editor to add CSS or global JavaScript to your page. User interface. The Optimize visual editor consists of two components, the app bar and the� JavaScript allows us to modify just about every aspect of the page: content, styling, and its response to user interaction. However, JavaScript can also block DOM construction and delay when the

use a boolean.

<script>
hide = false;
function show() {
    hide = !hide
        if (hide) {
            document.getElementById('demo').style.display = 'none'
        } else {
            document.getElementById('demo').style.display = 'block'
        }
}
</script>

20 Best Practices for Improving JavaScript Performance, Proper JavaScript performance is vital for ensuring that your website loads fast. and provide a list of best practices for optimizing JavaScript code. If you're making style changes, try to make all of your modifications at once� It turns out that he was looking for only 25 blocks, and all the other blocks he did not take, because they were on other pages. And I have a question: how to optimize page loading and display not all 550 blocks at once, but so that the filter searches from all available ones. I thought to do it somehow with the help of scripts can you?

If you don't want to use extra CSS and non-intrusive Javascript:

var btn = document.getElementById('btn');
var demo = document.getElementById('demo');
demo.style.display = 'block';

btn.addEventListener('click', function() {
  demo.style.display = demo.style.display === 'block' ? 'none' : 'block';
});
<h2>What Can JavaScript Do?</h2>
<p id="demo">JavaScript can hide HTML elements.</p>
<button type="button" id="btn">Click Me!</button>

11 Tips to Optimize JavaScript And Improve Website Loading, Machines are not sensitive to the visual style of code like a human would be. Computers can read and launch minified code, even if all of your� document.getElementById('test').style.display = 'inline'; document.getElementById('test').style.display = ''; the display style used for the element ends up being inline because that's the default for the element, it is not reset back to the style specified in the HTML code.

10 Ways to Minimize Reflows and Improve Performance, In extreme cases, a CSS effect could lead to slower JavaScript execution. An inline style will affect layout as the HTML is downloaded and Elements hidden with display: none; will not cause a repaint or reflow Give yourself more options and write higher quality CSS with CSS Optimization Basics. Learn how to optimize the performance of your JavaScript web applications using web workers in this tutorial. Optimizing JavaScript Application Performance with Web Workers - Twilio Level up your Twilio API skills in TwilioQuest , an educational game for Mac, Windows, and Linux.

JavaScript best practices, The reason is that every JavaScript file included in the page runs in the same For larger applications comment documentation in JavaDoc style makes a lot of functionality of your web applications it is very tempting to optimize your code as� The style property is used to get as well as set the inline style of an element. When getting, it returns a CSSStyleDeclaration object that contains a list of all styles properties for that element with values assigned for the attributes that are defined in the element's inline style attribute.

CSS performance optimization, To optimize the CSSOM construction, remove unnecessary styles, minify Applied to the @font-face rule, the font-display property defines how Multimedia: images � Multimedia: video; JavaScript performance best practices. The display property specifies the display behavior (the type of rendering box) of an element. In HTML, the default display property value is taken from the HTML specifications or from the browser/user default style sheet. The default value in XML is inline, including SVG elements.

Comments
  • inline css is never a good idea , it has the highest specificity.
  • That depends on what you are trying to achieve.