Resize image proportionally with CSS?

问题:

Is there a way to resize (scale down) images proportionally using ONLY CSS?

I\'m doing the JavaScript way, but just trying to see if this is possible with CSS.

回答1:

To resize the image proportionally using CSS:

img.resize {
    width:540px; /* you can use % */
    height: auto;
}

回答2:

Control size and maintain proportion :

#your-img {
    height: auto; 
    width: auto; 
    max-width: 300px; 
    max-height: 300px;
}

回答3:

If it\'s a background image, use background-size:contain.

Example css:

#your-div {
  background: url(\'image.jpg\') no-repeat;
  background-size:contain;
}

回答4:

Try

transform: scale(0.5, 0.5);
-ms-transform: scale(0.5, 0.5);
-webkit-transform: scale(0.5, 0.5);

回答5:

Notice that width:50% will resize it to 50% of the available space for the image, while max-width:50% will resize the image to 50% of its natural size. This is very important to take into account when using this rules for mobile web design, so for mobile web design max-width should always be used.

回答6:

To scale an image by keeping its aspect ratio

Try this,

img {
  max-width:100%;
  height:auto;
}

回答7:

You can use object-fit property:

.my-image {
    width: 100px;
    height: 100px;
    object-fit: contain;
}

This will fit image, without changing the proportionally.

回答8:

Revisited in 2015:

<img src=\"http://imageurl\" style=\"width: auto; height: auto;max-width: 120px;max-height: 100px\">

I\'ve revisited it as all common browsers now have working auto suggested by Cherif above, so that works even better as you don\'t need to know if image is wider than taller.

older version: If you are limited by box of 120x100 for example you can do

<img src=\"http://image.url\" height=\"100\" style=\"max-width: 120px\">

回答9:

The css properties max-width and max-height work great, but aren\'t supported by IE6 and I believe IE7. You would want to use this over height / width so you don\'t accidentally scale an image up. You would just want to limit the maximum height/width proportionately.

回答10:

<img style=\"width: 50%;\" src=\"...\" />

worked just fine for me ... Or am I missing something?

Edit: But see Shawn\'s caveat about accidentally upsizing.

回答11:

Use this easy scaling technique

img {
    max-width: 100%;
    height: auto;
}
@media {
  img { 
    width: auto; /* for ie 8 */
  }
}

回答12:

img{
    max-width:100%;
    object-fit: scale-down;
}

works for me. It scales down larger images to fit in the box, but leaves smaller images their original size.

回答13:

img {
    max-width:100%;
}

div {
    width:100px;
}

with this snippet you can do it in a more efficient way

回答14:

We can resize image using CSS in the browser using media queries and the principle of responsive design.

    @media screen and (orientation: portrait) {
img.ri {
    max-width: 80%;
  }
}

@media screen and (orientation: landscape) {
  img.ri { max-height: 80%; }
}

回答15:

You always need something like this

html
{
    width: 100%;
    height: 100%;
}

at the top of your css file

回答16:

Try this:

div.container {
    max-width: 200px;//real picture size
    max-height: 100px;
}

/* resize images */
div.container img {
    width: 100%;
    height: auto;
}

回答17:

I believe this is the easiest way to do it, also possible using through the inline style attribute within the <img> tag.

.scaled
{
  transform: scale(0.7); /* Equal to scaleX(0.7) scaleY(0.7) */
}

<img src=\"flower.png\" class=\"scaled\">

or

<img src=\"flower.png\" style=\"transform: scale(0.7);\">

回答18:

image_tag(\"/icons/icon.gif\", height: \'32\', width: \'32\') I need to set height: \'50px\', width: \'50px\' to image tag and this code works from first try note I tried all the above code but no luck so this one works and here is my code from my _nav.html.erb:
<%= image_tag(\"#{current_user.image}\", height: \'50px\', width: \'50px\') %>