You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
80 lines
1.3 KiB
JavaScript
80 lines
1.3 KiB
JavaScript
9 months ago
|
/*
|
||
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
||
|
|
Author Tobias Koppers @sokra
|
||
|
|
*/
|
||
|
|
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
const SAFE_IDENTIFIER = /^[_a-zA-Z$][_a-zA-Z$0-9]*$/;
|
||
|
|
const RESERVED_IDENTIFIER = new Set([
|
||
|
|
"break",
|
||
|
|
"case",
|
||
|
|
"catch",
|
||
|
|
"class",
|
||
|
|
"const",
|
||
|
|
"continue",
|
||
|
|
"debugger",
|
||
|
|
"default",
|
||
|
|
"delete",
|
||
|
|
"do",
|
||
|
|
"else",
|
||
|
|
"export",
|
||
|
|
"extends",
|
||
|
|
"finally",
|
||
|
|
"for",
|
||
|
|
"function",
|
||
|
|
"if",
|
||
|
|
"import",
|
||
|
|
"in",
|
||
|
|
"instanceof",
|
||
|
|
"new",
|
||
|
|
"return",
|
||
|
|
"super",
|
||
|
|
"switch",
|
||
|
|
"this",
|
||
|
|
"throw",
|
||
|
|
"try",
|
||
|
|
"typeof",
|
||
|
|
"var",
|
||
|
|
"void",
|
||
|
|
"while",
|
||
|
|
"with",
|
||
|
|
"enum",
|
||
|
|
// strict mode
|
||
|
|
"implements",
|
||
|
|
"interface",
|
||
|
|
"let",
|
||
|
|
"package",
|
||
|
|
"private",
|
||
|
|
"protected",
|
||
|
|
"public",
|
||
|
|
"static",
|
||
|
|
"yield",
|
||
|
|
"yield",
|
||
|
|
// module code
|
||
|
|
"await",
|
||
|
|
// skip future reserved keywords defined under ES1 till ES3
|
||
|
|
// additional
|
||
|
|
"null",
|
||
|
|
"true",
|
||
|
|
"false"
|
||
|
|
]);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @summary Returns a valid JS property name for the given property.
|
||
|
|
* Certain strings like "default", "null", and names with whitespace are not
|
||
|
|
* valid JS property names, so they are returned as strings.
|
||
|
|
*
|
||
|
|
* @param {string} prop property name to analyze
|
||
|
|
* @returns {string} valid JS property name
|
||
|
|
*/
|
||
|
|
const propertyName = prop => {
|
||
|
|
if (SAFE_IDENTIFIER.test(prop) && !RESERVED_IDENTIFIER.has(prop)) {
|
||
|
|
return prop;
|
||
|
|
} else {
|
||
|
|
return JSON.stringify(prop);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
module.exports = { SAFE_IDENTIFIER, RESERVED_IDENTIFIER, propertyName };
|