gree_leran/node_modules/webpack/lib/util/propertyAccess.js

34 lines
728 B
JavaScript

/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const {
SAFE_IDENTIFIER,
RESERVED_IDENTIFIER
} = require("../util/propertyName");
/**
* @param {ArrayLike<string>} properties properties
* @param {number} start start index
* @returns {string} chain of property accesses
*/
const propertyAccess = (properties, start = 0) => {
let str = "";
for (let i = start; i < properties.length; i++) {
const p = properties[i];
if (`${+p}` === p) {
str += `[${p}]`;
} else if (SAFE_IDENTIFIER.test(p) && !RESERVED_IDENTIFIER.has(p)) {
str += `.${p}`;
} else {
str += `[${JSON.stringify(p)}]`;
}
}
return str;
};
module.exports = propertyAccess;