@technobuddha/library
Version:
A large library of useful functions
37 lines (36 loc) • 1.2 kB
JavaScript
/**
* Unescape a string encoded in Javascript style
*
* @param input the string to unescape
* @returns the string with escapes resolved
*/
export function unescapeJS(input) {
return input.replace(
// cspell:disable-next-line
/\\(([bfnrtv"'\\])|([0-7]{1,3})|(x[0-9a-fA-F]{2})|(u[0-9a-fA-F]{4})|(u\{[0-9a-fA-F]{1,}\})|.)/ug, escape => {
const c = escape.charAt(1);
if (c === 'b')
return '\b';
if (c === 'f')
return '\f';
if (c === 'n')
return '\n';
if (c === 'r')
return '\r';
if (c === 't')
return '\t';
if (c === 'v')
return '\v';
if (c >= '0' && c <= '7')
return String.fromCharCode(Number.parseInt(escape.slice(1), 8));
if (c === 'x')
return String.fromCharCode(Number.parseInt(escape.slice(2), 16));
if (c === 'u') {
if (escape.charAt(2) === '{')
return String.fromCodePoint(Number.parseInt(escape.slice(3, -1), 16));
return String.fromCharCode(Number.parseInt(escape.slice(2), 16));
}
return escape.slice(1);
});
}
export default unescapeJS;