Changing an image while click is held

问题:

I am looking to change an image of a button from when a click is held, then change back upon click release. I currently have a flat image, and I want it to change to one with an inner-shadow to make it look like a button press, but change back to the original flat image when the mouse click is released. I tried onmouseup but I think i'm using it incorrectly. I want the "item" and "item2" to hold their image when clicked, and that works correctly. However I want the "item3" to change back upon mouse release, or just change back instantly after being clicked.

(Edit: I'm new to JavaScript, it doesn't have to be an onmouseup solution. If someone can explain how to create a function which does this then that would be great.)

JS:

var onImgStp= "images/stop.png";
var onImgPnk= "images/pink.png";
var onImgMut= "images/mute.png";
var offImg= "images/green.png";
var offImgStp= "images/stop2.png";

HTML:

<img class="item" src="images/pink.png" onclick="manage(1); this.src = (this.src.endsWith(offImg)? onImgPnk : offImg);"/>
<img class="item" src="images/pink.png" onclick="manage(2); this.src = (this.src.endsWith(offImg)? onImgPnk : offImg);"/>
<img class="item" src="images/pink.png" onclick="manage(3); this.src = (this.src.endsWith(offImg)? onImgPnk : offImg);"/>
<img class="item" src="images/pink.png" onclick="manage(4); this.src = (this.src.endsWith(offImg)? onImgPnk : offImg);"/>
<img class="item" src="images/pink.png" onclick="manage(5); this.src = (this.src.endsWith(offImg)? onImgPnk : offImg);"/>
<img class="item" src="images/pink.png" onclick="manage(6); this.src = (this.src.endsWith(offImg)? onImgPnk : offImg);"/>
<img class="item" src="images/pink.png" onclick="manage(7); this.src = (this.src.endsWith(offImg)? onImgPnk : offImg);"/>
<img class="item" src="images/pink.png" onclick="manage(8); this.src = (this.src.endsWith(offImg)? onImgPnk : offImg);"/>
<img class="item2" src="images/mute.png" onclick="this.src = (this.src.endsWith(offImg)? onImgMut : offImg);"/>
<img class="item3" src="images/stop.png" onmouseup="this.src = (this.src.endsWith(offImgStp)? onImgStp : offImgStp);"/>

回答1:

Have a look at this very simple Proof Of Concept solution (based on your question and the comments):

function mousedown() {
  var el = document.getElementById("image01");
  el.setAttribute("src", "http://blog.fantasy.co/wp-content/uploads/2013/02/feature_Net.jpg")
}

function resetImage() {
  var el = document.getElementById("image01");
  el.setAttribute("src", "https://camo.githubusercontent.com/b87a252140848659b80b0d2297e32dc62afee0cf/68747470733a2f2f646f63732e6d6963726f736f66742e636f6d2f656e2d75732f646f746e65742f61727469636c65732f696d616765732f6875622f6e6574636f72652e737667")
}

<img id="image01" src="https://camo.githubusercontent.com/b87a252140848659b80b0d2297e32dc62afee0cf/68747470733a2f2f646f63732e6d6963726f736f66742e636f6d2f656e2d75732f646f746e65742f61727469636c65732f696d616765732f6875622f6e6574636f72652e737667" alt="image" onmousedown="mousedown()" onmouseup="resetImage();" onmouseleave="resetImage();" />

Normally I would advise to use CSS (and maybe stitched images if you still need more than one) to accomplish this effect.

回答2:

Simple solution

.image-swap {
  cursor: pointer;
}

.image-swap>img, .image-swap:active>img:first-child {
  display: none;
}

.image-swap>img:first-child, .image-swap:active>img:last-child {
  display: block;
}

<div class="image-swap">
  <img src="http://blog.hvidtfeldts.net/media/city7.png" />
  <img src="http://blog.hvidtfeldts.net/media/city2.png" />
</div>

Remove select and drag effect

.image-swap {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  -o-user-select: none;
  user-select: none;
  cursor: pointer;
}

.image-swap>img {
  pointer-events: none;
  display: none;
}

.image-swap>img:first-child {
  display: block;
}

.image-swap:active>img:first-child {
  display: none;
}

.image-swap:active>img:last-child {
  display: block;
}

<div class="image-swap">
  <img src="http://blog.hvidtfeldts.net/media/city7.png" />
  <img src="http://blog.hvidtfeldts.net/media/city2.png" />
</div>

Smooth transition

.image-swap {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  -o-user-select: none;
  user-select: none;
  cursor: pointer;
  position: relative;
}

.image-swap>img {
  pointer-events: none;
  transition: all 0.6s;
  position: absolute;
  opacity: 0;
  left: 0;
}

.image-swap>img:first-child {
  position: static;
  opacity: 1;
}

.image-swap:active>img:first-child {
  opacity: 0;
}

.image-swap:active>img:last-child {
  opacity: 1;
}

<div class="image-swap">
  <img src="http://blog.hvidtfeldts.net/media/city7.png" />
  <img src="http://blog.hvidtfeldts.net/media/city2.png" />
</div>

If you want you could give classes to the images like base-img and active-img

So you could replace the :first-child with .base-img and :last-child with .active-img