@symblight/react-stockcharts/es/lib/utils/uniqueId.js

Highly customizable stock charts with ReactJS and d3

var idCounter = {};

export default function uniqueId() {
  var prefix = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '$unique$';

  if (!idCounter[prefix]) {
    idCounter[prefix] = 0;
  }

  var id = ++idCounter[prefix];
  if (prefix === '$unique$') {
    return '' + id;
  }

  return '' + prefix + id;
}
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