[removed] Rotate img on click

问题:

I'm trying to make the img with the id image rotate using the onclick event handler to use the code in my function which grabs the image by ID assigns a variable name, then uses the variable name to rotate. I'm not really sure where i when wrong in my code.

   <section id="middle">
    <img id="image" src="images/flower.png" >   
    <button onclick="myFunction()">Click me</button>
    </section>

MyFunction(){
var img = document.getElementById("image");
img.rotate(20*Math.PI/180);
}

回答1:

You can do the rotation itself using CSS:

.rotated-image {
  -webkit-transform: rotate(20deg);
          transform: rotate(20deg);
}

On the html:

<section id="middle">
    <img id="image" src="images/flower.png" >   
    <button onclick="myFunction()">Click me</button>
</section>

And then, on the javascript, just add the class:

function myFunction() {
  var img = document.getElementById("image");
  img.setAttribute("class", "rotated-image");
}

Check out the result: http://jsbin.com/ibEmUFI/2/edit

回答2:

try to use div with id as a selector:

<div id='image'><img src="images/flower.png" /></div>

 and 

var img = document.getElementById("image").getElementsByTagName('img');

worth a try!