vui-design/src/locale/utils/format.js

A high quality UI Toolkit based on Vue.js

/**
*  String format template
*  Inspired: https://github.com/Matt-Esch/string-template/index.js
*/
const nargs = /(%|)\{([0-9a-zA-Z_]+)\}/g;

export default function(Vue) {
  function template(string, ...args) {
    if (args.length === 1 && typeof args[0] === "object"){
      args = args[0];
    }

    if (!args || args.hasOwnProperty) {
      args = {};
    }

    return string.replace(nargs, function(match, prefix, i, index) {
      let result;

      if (string[index - 1] === "{" && string[index + match.length] === "}") {
        return i;
      }
      else {
        result = args.hasOwnProperty(i) ? args[i] : null;

        if (result === null || result === undefined) {
          return "";
        }

        return result;
      }
    });
  }

  return template;
};