When a URL like www.example.com/#signup is entered, the browser focuses its view on the HTML element with the ID signup. Is this correct?
Can the CSS style of the element be changed if it is focused in this way?
For example, if there is a div element with the ID signup, could its background be white when entering www.example.com, and yellow when entering www.example.com/#signup? This would serve to emphasize the sign up form. Is such customization possible at all?
:target { background-color: yellow; }
The :target pseudo-class is designed to change the background color to yellow.
To dynamically change the CSS class of an element based on the window.location.hash property when the page loads, you can use the following approach:
<script type='text/javascript>
function applyCssClassBasedOnHash(){
var hash = window.location.hash.substr(1);
var element = document.getElementById(hash);
if(element){
element.className += " emphasize";
}
}
</script>
<body onload="applyCssClassBasedOnHash()">
...
</body>
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