Asked  7 Months ago    Answers:  5   Viewed   20 times

Should I use <img>, <object>, or <embed> for loading SVG files into a page in a way similar to loading a jpg, gif or png?

What is the code for each to ensure it works as well as possible? (I'm seeing references to including the mimetype or pointing to fallback SVG renderers in my research and not seeing a good state of the art reference).

Assume I am checking for SVG support with Modernizr and falling back (probably doing a replacement with a plain <img> tag)for non SVG-capable browsers.

 Answers

96

I can recommend the SVG Primer (published by the W3C), which covers this topic: http://www.w3.org/Graphics/SVG/IG/resources/svgprimer.html#SVG_in_HTML

If you use <object> then you get raster fallback for free*:

<object data="your.svg" type="image/svg+xml">
  <img src="yourfallback.jpg" />
</object>

*) Well, not quite for free, because some browsers download both resources, see Larry's suggestion below for how to get around that.

2014 update:

  • If you want a non-interactive svg, use <img> with script fallbacks to png version (for older IE and android < 3). One clean and simple way to do that:

    <img src="your.svg" onerror="this.src='your.png'">.

    This will behave much like a GIF image, and if your browser supports declarative animations (SMIL) then those will play.

  • If you want an interactive svg, use either <iframe> or <object>.

  • If you need to provide older browsers the ability to use an svg plugin, then use <embed>.

  • For svg in css background-image and similar properties, modernizr is one choice for switching to fallback images, another is depending on multiple backgrounds to do it automatically:

    div {
        background-image: url(fallback.png);
        background-image: url(your.svg), none;
    }
    

    Note: the multiple backgrounds strategy doesn't work on Android 2.3 because it supports multiple backgrounds but not svg.

An additional good read is this blogpost on svg fallbacks.

Tuesday, June 1, 2021
 
shin
answered 7 Months ago
28

Found a solution after much brain-wracking. Instead of this:

<!--[if mso]><v:shape>...</v:shape><![endif]-->
<!--[if !mso]>[fallback goes here]<![endif]-->

This works very well:

<!--[if mso]>
    <v:shape>...</v:shape>
    <div style="width:0px; height:0px; overflow:hidden; display:none; visibility:hidden; mso-hide:all;">
<![endif]-->

    [fallback goes here]

<!--[if mso]></div><![endif]-->

All it does is wrap the fallback in an invisible div in MSO, and deploys the vector solution instead.

Hope this helps someone in the future!

Friday, June 18, 2021
 
tompave
answered 6 Months ago
46

The closest thing that I could find was svg4mobile.

While I don't believe that it does transformations to Drawables XML, it does read the svg and make the appropriate calls to the Drawable classes.

Sunday, June 27, 2021
 
danjah
answered 6 Months ago
49

You also need to define the following method as follows:

- (void)encodeWithCoder:(NSCoder *)enCoder {
    [super encodeWithCoder:enCoder];

    [enCoder encodeObject:instanceVariable forKey:INSTANCEVARIABLE_KEY];

    // Similarly for the other instance variables.
    ....
}

And in the initWithCoder method initialize as follows:

- (id)initWithCoder:(NSCoder *)aDecoder {

   if(self = [super initWithCoder:aDecoder]) {
       self.instanceVariable = [aDecoder decodeObjectForKey:INSTANCEVARIABLE_KEY];

       // similarly for other instance variables
       ....
   }

   return self;
}

You can initialize the object standard way i.e

CustomObject *customObject = [[CustomObject alloc] init];
Tuesday, June 29, 2021
 
Rocket
answered 6 Months ago
23
class MyForm(forms.Form):
    CHOICES = (('Option 1', 'Option 1'),('Option 2', 'Option 2'),)
    field = forms.ChoiceField(choices=CHOICES)

print MyForm().as_p()

# out: <p><label for="id_field">Field:</label> <select name="field" id="id_field">n<option value="Option 1">Option 1</option>n<option value="Option 2">Option 2</option>n</select></p>
Saturday, September 25, 2021
 
MikeSmithDev
answered 2 Months ago
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