happy-dom
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Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. It includes many web standards from WHATWG DOM and HTML.
42 lines • 1.3 kB
JavaScript
const ASCII_LOWER_CASE_CACHE = new Map();
const ASCII_UPPER_CASE_CACHE = new Map();
const ASCII_UPPER_CASE_REGEXP = /[A-Z]/g;
const ASCII_LOWER_CASE_REGEXP = /[a-z]/g;
/**
* String utility.
*/
export default class StringUtility {
/**
* ASCII lowercase.
*
* @see https://infra.spec.whatwg.org/#ascii-lowercase
* @param text Text.
* @returns Lowercase text.
*/
static asciiLowerCase(text) {
const cached = ASCII_LOWER_CASE_CACHE.get(text);
if (cached) {
return cached;
}
const newText = text.replace(ASCII_UPPER_CASE_REGEXP, (char) => String.fromCharCode(char.charCodeAt(0) + 32));
ASCII_LOWER_CASE_CACHE.set(text, newText);
return newText;
}
/**
* ASCII uppercase.
*
* @see https://infra.spec.whatwg.org/#ascii-uppercase
* @param text Text.
* @returns Uppercase text.
*/
static asciiUpperCase(text) {
const cached = ASCII_UPPER_CASE_CACHE.get(text);
if (cached) {
return cached;
}
const newText = text.replace(ASCII_LOWER_CASE_REGEXP, (char) => String.fromCharCode(char.charCodeAt(0) - 32));
ASCII_UPPER_CASE_CACHE.set(text, newText);
return newText;
}
}
//# sourceMappingURL=StringUtility.js.map