@atlassian/aui/lib/js/aui/unique-id.js

Atlassian User Interface Framework

(function (global, factory) {
    if (typeof define === "function" && define.amd) {
        define(['module', 'exports', './internal/globalize'], factory);
    } else if (typeof exports !== "undefined") {
        factory(module, exports, require('./internal/globalize'));
    } else {
        var mod = {
            exports: {}
        };
        factory(mod, mod.exports, global.globalize);
        global.uniqueId = mod.exports;
    }
})(this, function (module, exports, _globalize) {
    'use strict';

    Object.defineProperty(exports, "__esModule", {
        value: true
    });

    var _globalize2 = _interopRequireDefault(_globalize);

    function _interopRequireDefault(obj) {
        return obj && obj.__esModule ? obj : {
            default: obj
        };
    }

    var uniqueID;
    var uniqueIDstring;
    var uniqueIDcounter = 0;

    /**
     * Generate a unique ID string, checking the ID is not present in the DOM before
     * returning. Note uniqueID, uniqueIDstring, uniqueIDcounter = 0; set at top of
     * file.
     *
     * @param {String} prefix String to prepend to ID instead of default AUI prefix.
     *
     * @returns {String}
     */
    function generateUniqueId(prefix) {
        uniqueID = uniqueIDcounter++ + '';
        uniqueIDstring = prefix ? prefix + uniqueID : 'aui-uid-' + uniqueID;

        if (!document.getElementById(uniqueIDstring)) {
            return uniqueIDstring;
        } else {
            uniqueIDstring = uniqueIDstring + '-' + new Date().getTime();

            if (!document.getElementById(uniqueIDstring)) {
                return uniqueIDstring;
            } else {
                throw new Error('Timestamped fallback ID "' + uniqueIDstring + '" exists.');
            }
        }
    }

    (0, _globalize2.default)('id', generateUniqueId);

    exports.default = generateUniqueId;
    module.exports = exports['default'];
});
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