ra-core/src/i18n/substituteTokens.ts

Core components of react-admin, a frontend Framework for building admin applications on top of REST services, using ES6, React

/**
 * Replace tokens by their value in the given string
 *
 * @param {string} template The template with interpolation tokens, e.g. 'Hello, %{name}'
 * @param {object} data The data to interpolate, e.g. { name: 'John' }
 * @returns {string} The interpolated string, e.g. 'Hello, John'
 */
export const substituteTokens = (template, data) =>
    template && data
        ? String.prototype.replace.call(
              template,
              defaultTokenRegex,
              function (expression, argument) {
                  if (
                      !data.hasOwnProperty(argument) ||
                      data[argument] == null
                  ) {
                      return expression;
                  }
                  return data[argument];
              }
          )
        : template;

// tokens are like 'Hello, %{name}'
const defaultTokenRegex = /%\{(.*?)\}/g;