id-generator.js — react Source File

Source Code

'use strict';

/* eslint-disable react-internal/safe-string-coercion */

//------------------------------------------------------------------------------
// Public Interface
//------------------------------------------------------------------------------

/**
 * A generator for unique ids.
 */
class IdGenerator {
  /**
   * @param {string} prefix Optional. A prefix of generated ids.
   */
  constructor(prefix) {
    this.prefix = String(prefix);
    this.n = 0;
  }

  /**
   * Generates id.
   * @returns {string} A generated id.
   */
  next() {
    this.n = (1 + this.n) | 0;

    /* c8 ignore start */
    if (this.n < 0) {
      this.n = 1;
    } /* c8 ignore stop */

    return this.prefix + this.n;
  }
}

module.exports = IdGenerator;