com.google.javascript.jscomp.js.es6.string.raw.js Maven / Gradle / Ivy

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Closure Compiler is a JavaScript optimizing compiler. It parses your JavaScript, analyzes it, removes dead code and rewrites and minimizes what's left. It also checks syntax, variable references, and types, and warns about common JavaScript pitfalls. It is used in many of Google's JavaScript apps, including Gmail, Google Web Search, Google Maps, and Google Docs.

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/*
 * Copyright 2021 The Closure Compiler Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * @fileoverview String.raw polyfill.
 * @suppress {uselessCode}
 */

'require util/polyfill';

$jscomp.polyfill('String.raw', function(orig) {
  if (orig) return orig;

  /**
   * Polyfills String.raw.
   *
   * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/raw
   *
   * @param {!ITemplateArray} strings List of string fragments to concatenate.
   * @param {...*} var_args Values to go between string fragments.
   * @return {string}
   */
  var stringRaw = function(strings, var_args) {
    if (strings == null) {
      throw new TypeError('Cannot convert undefined or null to object');
    }
    var raw = strings.raw;
    var rawlen = raw.length;
    var result = "";
    for (var i = 0; i < rawlen; ++i) {
      result += raw[i];
      if ((i + 1) < rawlen && (i + 1) < arguments.length) {
        result += String(arguments[i+1]);
      }
    }
    return result;
  };

  return stringRaw;
}, 'es6', 'es3');