17 lines
448 B
JavaScript
17 lines
448 B
JavaScript
module.exports = function escape(url) {
|
|
if (typeof url !== 'string') {
|
|
return url
|
|
}
|
|
// If url is already wrapped in quotes, remove them
|
|
if (/^['"].*['"]$/.test(url)) {
|
|
url = url.slice(1, -1);
|
|
}
|
|
// Should url be wrapped?
|
|
// See https://drafts.csswg.org/css-values-3/#urls
|
|
if (/["'() \t\n]/.test(url)) {
|
|
return '"' + url.replace(/"/g, '\\"').replace(/\n/g, '\\n') + '"'
|
|
}
|
|
|
|
return url
|
|
}
|