inject-stylesheet
Advanced tools
Create a style element with CSS properties, filtering input using a allowlist or blocklist
This library takes a blocklist (or allowlist) of CSS properties and sanitizes for known CSS exploits.
Where mentioned, styles is an object with its keys being CSS selectors and values being CSS property key-value pairs.
var stylesheet = injectStylesheet.injectWithBlocklist(styles [, blocklist]);
var stylesheet = injectStylesheet.injectWithAllowlist(styles [, allowlist]);
After usage, stylesheet will refer to the <style> tag that was injected into the <head> of the document.
var injectStylesheet = require("inject-stylesheet");
var styles = {
input: {
"font-size": "16pt",
color: "#3A3A3A",
},
".invalid": {
color: "tomato",
},
"@media screen and (max-width: 700px)": {
input: {
"font-size": "14pt",
},
},
};
var allowlist = ["font-size", "color"];
var blocklist = ["background", "display"];
injectStylesheet.injectWithBlocklist(styles, blocklist);
injectStylesheet.injectWithAllowlist(styles, allowlist);
Selectors are filtered for things such as {}, @import, etc.
Keys are filtered based on whether or not a blocklist or allowlist was given. injectStylesheet will assume that its second parameter is a blocklist unless the third parameter is true, which will designate it as a allowlist. This listing is used to filter the given CSS properties for exclusion or inclusion.
Values are checked against usages of url(), evaluate(), and other potentially abused and powerful CSS functions.
All modern browsers, and IE9+
6.0.1
FAQs
Create a style element with CSS properties, filtering input using a allowlist or blocklist
The npm package inject-stylesheet receives a total of 170,466 weekly downloads. As such, inject-stylesheet popularity was classified as popular.
We found that inject-stylesheet demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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