如何在 body 标签上设置 CSS 以使用 JavaScript 旋转页面

Question

I found the following code while reading a related question at this page: Rotate a webpage clockwise or anticlockwise

html {
     -webkit-transform: rotate(180deg);
     -moz-transform: rotate(180deg);
}

--

My question is how do I set this CSS via JavaScript?

When a visitor clicks on an image, I want to use JavaScript to modify the HTML tag's style using the settings above.

Thanks in advance.

Answer 1

The easiest way to do this is by putting this in a class, and assigning that class dynamically using JavaScript:

CSS:

html.rotateme {
     -webkit-transform: rotate(180deg);
     -moz-transform: rotate(180deg);
}

JavaScript:

document.documentElement.setAttribute('class', 'rotateme'); //Note that this will override the current class

Since you're using a very recent CSS feature, you probably don't need to support older browsers. Therefore, you can also use Element.classList to add a class.

To prevent this from throwing an exception in older browsers, you can check for the existance of it first:

JavaScript:

document.documentElement.classList && document.documentElement.classList.add('rotateme'); //This won't  override the current class

See also: Change an element's class with JavaScript

Answer 2

You use the style attribute on the HTML node.

Something like this will do it:

var htmlNode = document.documentElement;
htmlNode.style.webkitTransform = 'rotate(180deg)';
htmlNode.style.mozTransform = 'rotate(180deg)';

Then, to undo the rotate, set the values to an empty string:

var htmlNode = document.documentElement;
htmlNode.style.webkitTransform = '';
htmlNode.style.mozTransform = '';

Answer 3

Simple

$('#wrap').on('click',function(){
$('html').css('-webkit-transform','rotate(180deg)');
$('html').css('-moz-transform','rotate(180deg)');})

Answer 4

**JQUERY**

$("#imgID").on("click", function(){
    $('html').css({"-webkit-transform": "rotate(180deg)", "moz-transform": "rotate(180deg)"});
});

only js

use user2428118's answer, it's a solid solution.

Answer 5

define a class for this:-

.htmlrotate {
     -webkit-transform: rotate(180deg);
     -moz-transform: rotate(180deg);
}

onclick of the button, run this:-

document.documentElement.classList.add('htmlrotate');

Answer 6

  $('html').bind('click', function () {
                $('html').css({
                    '-webkit-transform': 'rotate(90deg)',
                    '  -moz-transform': 'rotate(90deg)'
                })
            });