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/wp-includes/js/dist/ -> blob.js (source)

   1  /******/ (() => { // webpackBootstrap
   2  /******/     "use strict";
   3  /******/     // The require scope
   4  /******/     var __webpack_require__ = {};
   5  /******/     
   6  /************************************************************************/
   7  /******/     /* webpack/runtime/define property getters */
   8  /******/     (() => {
   9  /******/         // define getter functions for harmony exports
  10  /******/         __webpack_require__.d = (exports, definition) => {
  11  /******/             for(var key in definition) {
  12  /******/                 if(__webpack_require__.o(definition, key) && !__webpack_require__.o(exports, key)) {
  13  /******/                     Object.defineProperty(exports, key, { enumerable: true, get: definition[key] });
  14  /******/                 }
  15  /******/             }
  16  /******/         };
  17  /******/     })();
  18  /******/     
  19  /******/     /* webpack/runtime/hasOwnProperty shorthand */
  20  /******/     (() => {
  21  /******/         __webpack_require__.o = (obj, prop) => (Object.prototype.hasOwnProperty.call(obj, prop))
  22  /******/     })();
  23  /******/     
  24  /******/     /* webpack/runtime/make namespace object */
  25  /******/     (() => {
  26  /******/         // define __esModule on exports
  27  /******/         __webpack_require__.r = (exports) => {
  28  /******/             if(typeof Symbol !== 'undefined' && Symbol.toStringTag) {
  29  /******/                 Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
  30  /******/             }
  31  /******/             Object.defineProperty(exports, '__esModule', { value: true });
  32  /******/         };
  33  /******/     })();
  34  /******/     
  35  /************************************************************************/
  36  var __webpack_exports__ = {};
  37  __webpack_require__.r(__webpack_exports__);
  38  /* harmony export */ __webpack_require__.d(__webpack_exports__, {
  39  /* harmony export */   createBlobURL: () => (/* binding */ createBlobURL),
  40  /* harmony export */   downloadBlob: () => (/* binding */ downloadBlob),
  41  /* harmony export */   getBlobByURL: () => (/* binding */ getBlobByURL),
  42  /* harmony export */   getBlobTypeByURL: () => (/* binding */ getBlobTypeByURL),
  43  /* harmony export */   isBlobURL: () => (/* binding */ isBlobURL),
  44  /* harmony export */   revokeBlobURL: () => (/* binding */ revokeBlobURL)
  45  /* harmony export */ });
  46  /**
  47   * @type {Record<string, File|undefined>}
  48   */
  49  const cache = {};
  50  
  51  /**
  52   * Create a blob URL from a file.
  53   *
  54   * @param {File} file The file to create a blob URL for.
  55   *
  56   * @return {string} The blob URL.
  57   */
  58  function createBlobURL(file) {
  59    const url = window.URL.createObjectURL(file);
  60    cache[url] = file;
  61    return url;
  62  }
  63  
  64  /**
  65   * Retrieve a file based on a blob URL. The file must have been created by
  66   * `createBlobURL` and not removed by `revokeBlobURL`, otherwise it will return
  67   * `undefined`.
  68   *
  69   * @param {string} url The blob URL.
  70   *
  71   * @return {File|undefined} The file for the blob URL.
  72   */
  73  function getBlobByURL(url) {
  74    return cache[url];
  75  }
  76  
  77  /**
  78   * Retrieve a blob type based on URL. The file must have been created by
  79   * `createBlobURL` and not removed by `revokeBlobURL`, otherwise it will return
  80   * `undefined`.
  81   *
  82   * @param {string} url The blob URL.
  83   *
  84   * @return {string|undefined} The blob type.
  85   */
  86  function getBlobTypeByURL(url) {
  87    return getBlobByURL(url)?.type.split('/')[0]; // 0: media type , 1: file extension eg ( type: 'image/jpeg' ).
  88  }
  89  
  90  /**
  91   * Remove the resource and file cache from memory.
  92   *
  93   * @param {string} url The blob URL.
  94   */
  95  function revokeBlobURL(url) {
  96    if (cache[url]) {
  97      window.URL.revokeObjectURL(url);
  98    }
  99    delete cache[url];
 100  }
 101  
 102  /**
 103   * Check whether a url is a blob url.
 104   *
 105   * @param {string|undefined} url The URL.
 106   *
 107   * @return {boolean} Is the url a blob url?
 108   */
 109  function isBlobURL(url) {
 110    if (!url || !url.indexOf) {
 111      return false;
 112    }
 113    return url.indexOf('blob:') === 0;
 114  }
 115  
 116  /**
 117   * Downloads a file, e.g., a text or readable stream, in the browser.
 118   * Appropriate for downloading smaller file sizes, e.g., < 5 MB.
 119   *
 120   * Example usage:
 121   *
 122   * ```js
 123   *     const fileContent = JSON.stringify(
 124   *         {
 125   *             "title": "My Post",
 126   *         },
 127   *         null,
 128   *         2
 129   *     );
 130   *     const filename = 'file.json';
 131   *
 132   *     downloadBlob( filename, fileContent, 'application/json' );
 133   * ```
 134   *
 135   * @param {string}   filename    File name.
 136   * @param {BlobPart} content     File content (BufferSource | Blob | string).
 137   * @param {string}   contentType (Optional) File mime type. Default is `''`.
 138   */
 139  function downloadBlob(filename, content, contentType = '') {
 140    if (!filename || !content) {
 141      return;
 142    }
 143    const file = new window.Blob([content], {
 144      type: contentType
 145    });
 146    const url = window.URL.createObjectURL(file);
 147    const anchorElement = document.createElement('a');
 148    anchorElement.href = url;
 149    anchorElement.download = filename;
 150    anchorElement.style.display = 'none';
 151    document.body.appendChild(anchorElement);
 152    anchorElement.click();
 153    document.body.removeChild(anchorElement);
 154    window.URL.revokeObjectURL(url);
 155  }
 156  
 157  (window.wp = window.wp || {}).blob = __webpack_exports__;
 158  /******/ })()
 159  ;


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