css - 使用数据 URI SVG 作为 CSS 背景图像

Answer 1

See how the working fiddle has double quotes just inside the url() and then all the SVG content uses single quotes? You need to do the same. Otherwise the parser doesn't know where the url content ends.

Alternatively you could make the url use single quotes and keep your SVG content the same.

body { background-image: url('data:image/svg+xml;utf8,<svg class="shadow" xmlns="http://www.w3.org/2000/svg" version="1.1"><defs><filter id="f1"><feGaussianBlur in="SourceGraphic" stdDeviation="5" /></filter></defs><polygon points="200,0 200,200 0,200" filter="url(%23f1)"/></svg>'); }

Answer 2

You can also use a base64 encoding for a cleaner format, even if it increase the actual SVG file size. See also css-tricks.com post.

i.e.:

background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIy NCIgaGVpZ2h0PSIyNCIgdmlld0JveD0iMCAwIDI0IDI0Ij4KICAgIDxwYXRoIGQ9 Ik0wIDBoMjR2MjRoLTI0eiIgZmlsbD0ibm9uZSIvPgogICAgPHBhdGggZD0iTTEw LjA5IDE1LjU5bDEuNDEgMS40MSA1LTUtNS01LTEuNDEgMS40MSAyLjU4IDIuNTlo LTkuNjd2Mmg5LjY3bC0yLjU4IDIuNTl6bTguOTEtMTIuNTloLTE0Yy0xLjExIDAt MiAuOS0yIDJ2NGgydi00aDE0djE0aC0xNHYtNGgtMnY0YzAgMS4xLjg5IDIgMiAy aDE0YzEuMSAwIDItLjkgMi0ydi0xNGMwLTEuMS0uOS0yLTItMnoiLz4KPC9zdmc+ Cg==');

You can use this bash command (tested on MacOS X) to easily generate the CSS background property:

echo "background: url('data:image/svg+xml;base64,"$(openssl base64 < Downloads/material-design-icons-1.0.0/action/svg/ic_exit_to_app_24px.svg)"');"

Answer 3

Make sure to use percent-encoding in data URI not encoded with base64.

For example, for an SVG, encode like this:

body { 
  background-image: url('data:image/svg+xml;utf8,%3Csvg%20class%3D%22shadow%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20version%3D%221.1%22%3E%3Cpolygon%20style%3D%22stroke%3A%23252423%3Bfill%3A%23252423%3B%22%20points%3D%220%2C200%200%2C0%20200%2C0%22%2F%3E%3C%2Fsvg%3E'); 
}

This is equivalent to the following SVG:

<svg class="shadow" xmlns="http://www.w3.org/2000/svg" version="1.1"><polygon style="stroke:#252423;fill:#252423;" points="0,200 0,0 200,0"/></svg>

To percent encode an image, you can use the following JavaScript code:

console.log(encodeURIComponent('<svg class="shadow" xmlns="http://www.w3.org/2000/svg" version="1.1"><polygon style="stroke:#252423;fill:#252423;" points="0,200 0,0 200,0"/></svg>'))