Is it possible to resize an inline SVG element without modifying the <svg> tag?

Question

Is it possible to resize an inline SVG element without modifying the <svg> tag?

Utilizing a Ruby gem known as rqrcode, I am able to create a QR code in SVG format and send it as an API response. Within my frontend (Vue.js), I am faced with the task of displaying the SVG at a specific size.

Currently, my code appears as follows, rendering the SVG yet lacking the ability to specify its size:

<div v-html="qrCode" />

While attempting to add styles to the div, the SVG seems to ignore them entirely. To illustrate, here is how it currently appears:

https://i.sstatic.net/ztBtF.png

As far as I am aware, SVG scaling can be achieved with the use of width, height, and viewBox within the <svg> tag. However, rqrcode does not provide the option to specify these properties - the height and width are predetermined by the gem, resulting in the opening svg tag looking like this:

<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ev="http://www.w3.org/2001/xml-events" width="246" height="246" shape-rendering="crispEdges">

Hence, my inquiry is centered around how I can indicate the size of the inline SVG to fit within its parent container, directly from the parent container?

[Edit for clarification] Should the dimensions within the <svg> tag exceed those of my div container, I desire for the SVG to reduce in size to fit the container accordingly. Conversely, if the dimensions are smaller, I aim for the SVG to expand and fill the container. I am uncertain if this is achievable.

css vue.js svg

Answer 1

Answer №1

If you want to customize the size of an inline element like height and width, you can achieve this by using CSS.

Just remember that the CSS rules need to be unscoped, so you may need to create a separate style block if necessary.

<style scoped>
  ...
</style>
<style>
div > svg {
  height: 100px;
  width: 100px;
}
</style>

Answer 2

If you want to customize the size of an inline element like height and width, you can achieve this by using CSS.

Just remember that the CSS rules need to be unscoped, so you may need to create a separate style block if necessary.

<style scoped>
  ...
</style>
<style>
div > svg {
  height: 100px;
  width: 100px;
}
</style>

Answer 3

Answer №2

Make sure to designate the position as relative and specify the width for the svg class. Don't overlook assigning a classname to the svg. For this example, let's assume the class name is 'svgClass'

div {
    height: 500px;
    width: 500px;
    border: 1px solid black;
    overflow: auto;
    position: relative; /* don't forget to include this line! */
}

svg.svgClass {  /* classname of the svg */
    width: 100% !important;
    height: 100% !important;
}

Answer 4

Make sure to designate the position as relative and specify the width for the svg class. Don't overlook assigning a classname to the svg. For this example, let's assume the class name is 'svgClass'

div {
    height: 500px;
    width: 500px;
    border: 1px solid black;
    overflow: auto;
    position: relative; /* don't forget to include this line! */
}

svg.svgClass {  /* classname of the svg */
    width: 100% !important;
    height: 100% !important;
}

Answer 5

Answer №3

UPDATE: Summary: The qr class's as_svg method now includes a module_size option, which can be adjusted to a smaller value than the default of 11.

Currently facing the same issue myself. Upon inspecting the SVG element in the HTML, it's evident that the gem has set specific height and width values, in my case 495x495. Modifying these values in the inspector yields similar results, but the QR code gets cut off. After a closer look at the SVG, I discovered 1030 child rect elements, each with its own height, width, x, and y values.

https://i.sstatic.net/dniow.png

Initially considering iterating through each child element to scale it down, I stumbled upon some details in the documentation that I had missed previously.

By adjusting the module size, changing it to 5, I achieved an SVG size of 225x225.

Link to the repository https://github.com/whomwah/rqrcode

qrcode = RQRCode::QRCode.new("http://github.com/")

# NOTE: demonstrated with default options explicitly specified
svg = qrcode.as_svg(
  color: "000",
  shape_rendering: "crispEdges",
  module_size: 11,
  standalone: true,
  use_path: true
)

Answer 6

UPDATE: Summary: The qr class's as_svg method now includes a module_size option, which can be adjusted to a smaller value than the default of 11.

Currently facing the same issue myself. Upon inspecting the SVG element in the HTML, it's evident that the gem has set specific height and width values, in my case 495x495. Modifying these values in the inspector yields similar results, but the QR code gets cut off. After a closer look at the SVG, I discovered 1030 child rect elements, each with its own height, width, x, and y values.

https://i.sstatic.net/dniow.png

Initially considering iterating through each child element to scale it down, I stumbled upon some details in the documentation that I had missed previously.

By adjusting the module size, changing it to 5, I achieved an SVG size of 225x225.

Link to the repository https://github.com/whomwah/rqrcode

qrcode = RQRCode::QRCode.new("http://github.com/")

# NOTE: demonstrated with default options explicitly specified
svg = qrcode.as_svg(
  color: "000",
  shape_rendering: "crispEdges",
  module_size: 11,
  standalone: true,
  use_path: true
)

Is it possible to resize an inline SVG element without modifying the <svg> tag?

Answer №1

Answer №2

Answer №3

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