css.escape.js
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/*! https://mths.be/cssescape v1.5.1 by @mathias | MIT license */
;(function(root, factory) {
// https://github.com/umdjs/umd/blob/master/returnExports.js
if (typeof exports == 'object') {
// For Node.js.
module.exports = factory(root);
} else if (typeof define == 'function' && define.amd) {
// For AMD. Register as an anonymous module.
define([], factory.bind(root, root));
} else {
// For browser globals (not exposing the function separately).
factory(root);
}
}(typeof global != 'undefined' ? global : this, function(root) {
if (root.CSS && root.CSS.escape) {
return root.CSS.escape;
}
// https://drafts.csswg.org/cssom/#serialize-an-identifier
var cssEscape = function(value) {
if (arguments.length == 0) {
throw new TypeError('`CSS.escape` requires an argument.');
}
var string = String(value);
var length = string.length;
var index = -1;
var codeUnit;
var result = '';
var firstCodeUnit = string.charCodeAt(0);
while (++index < length) {
codeUnit = string.charCodeAt(index);
// Note: there’s no need to special-case astral symbols, surrogate
// pairs, or lone surrogates.
// If the character is NULL (U+0000), then the REPLACEMENT CHARACTER
// (U+FFFD).
if (codeUnit == 0x0000) {
result += '\uFFFD';
continue;
}
if (
// If the character is in the range [\1-\1F] (U+0001 to U+001F) or is
// U+007F, […]
(codeUnit >= 0x0001 && codeUnit <= 0x001F) || codeUnit == 0x007F ||
// If the character is the first character and is in the range [0-9]
// (U+0030 to U+0039), […]
(index == 0 && codeUnit >= 0x0030 && codeUnit <= 0x0039) ||
// If the character is the second character and is in the range [0-9]
// (U+0030 to U+0039) and the first character is a `-` (U+002D), […]
(
index == 1 &&
codeUnit >= 0x0030 && codeUnit <= 0x0039 &&
firstCodeUnit == 0x002D
)
) {
// https://drafts.csswg.org/cssom/#escape-a-character-as-code-point
result += '\\' + codeUnit.toString(16) + ' ';
continue;
}
if (
// If the character is the first character and is a `-` (U+002D), and
// there is no second character, […]
index == 0 &&
length == 1 &&
codeUnit == 0x002D
) {
result += '\\' + string.charAt(index);
continue;
}
// If the character is not handled by one of the above rules and is
// greater than or equal to U+0080, is `-` (U+002D) or `_` (U+005F), or
// is in one of the ranges [0-9] (U+0030 to U+0039), [A-Z] (U+0041 to
// U+005A), or [a-z] (U+0061 to U+007A), […]
if (
codeUnit >= 0x0080 ||
codeUnit == 0x002D ||
codeUnit == 0x005F ||
codeUnit >= 0x0030 && codeUnit <= 0x0039 ||
codeUnit >= 0x0041 && codeUnit <= 0x005A ||
codeUnit >= 0x0061 && codeUnit <= 0x007A
) {
// the character itself
result += string.charAt(index);
continue;
}
// Otherwise, the escaped character.
// https://drafts.csswg.org/cssom/#escape-a-character
result += '\\' + string.charAt(index);
}
return result;
};
if (!root.CSS) {
root.CSS = {};
}
root.CSS.escape = cssEscape;
return cssEscape;
}));