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metamask-extension/development/lib/parse-port.js
Erik Marks 76a2a9bb8b
@metamask/eslint config@5.0.0 (#10358)
* @metamask/eslint-config@5.0.0
* Update eslintrc and prettierrc
* yarn lint:fix
2021-02-04 10:15:23 -08:00

21 lines
616 B
JavaScript

/**
* Parse a string as a port number. Non-integers or invalid ports will
* result in an error being thrown.
*
* @param {String} portString - The string to parse as a port number
* @returns {number} The parsed port number
*/
function parsePort(portString) {
const port = Number(portString);
if (!Number.isInteger(port)) {
throw new Error(`Port '${portString}' is invalid; must be an integer`);
} else if (port < 0 || port > 65535) {
throw new Error(
`Port '${portString}' is out of range; must be between 0 and 65535 inclusive`,
);
}
return port;
}
module.exports = { parsePort };