If I use the following code, I am getting an error "Already read" when accessing .json() . If we post using the pollyfill can we can we not read the json that is returned back?

var param = {name: 'Bob'};
fetch('/api', {
  method: 'POST', // or 'PUT'
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify(param)
})
  .then(function(response) {
    if (response.ok) {
      return response.json();
    } else {
      var error = new Error(response.statusText);
      error.response = response;
      throw error;
    }
  })
  .then(function(json) {
    console.log('parsed json', json);
    document.getElementById('divresponse').innerText = JSON.stringify(json);
  })
  .catch(function(ex) {
    console.log('parsing failed', ex);
  });

Below is the IE version.

The response body may be consumed only a single time. Calling the response.json(), response.text(), etc methods can only be done once and only one of them may be called on the response object.

I don't see anything in your code example that consumes the response body multiple times. However, attaching the response object to the exception allows multiple catch blocks to consume the response body, which may be causing this error. You can clone the response with response.clone() to consume the body again.

Bumps http-proxy from 1.18.0 to 1.18.1. <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/http-party/node-http-proxy/blob/master/CHANGELOG.md">http-proxy's changelog</a>.</em></p> <blockquote> <h2><a href="https://github.com/http-party/node-http-proxy/compare/1.18.0...v1.18.1">v1.18.1</a> - 2020-05-17</h2> <h3>Merged</h3> <ul> <li>Skip sending the proxyReq event when the expect header is present <a href="https://github-redirect.dependabot.com/http-party/node-http-proxy/pull/1447"><code>#1447</code></a></li> <li>Remove node6 support, add node12 to build <a href="https://github-redirect.dependabot.com/http-party/node-http-proxy/pull/1397"><code>#1397</code></a></li> </ul> </blockquote> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/http-party/node-http-proxy/commit/9b96cd725127a024dabebec6c7ea8c807272223d"><code>9b96cd7</code></a> 1.18.1</li> <li><a href="https://github.com/http-party/node-http-proxy/commit/335aeeba2f0c286dc89c402eeb76af47834c89a3"><code>335aeeb</code></a> Skip sending the proxyReq event when the expect header is present (<a href="https://github-redirect.dependabot.com/http-party/node-http-proxy/issues/1447">#1447</a>)</li> <li><a href="https://github.com/http-party/node-http-proxy/commit/dba39668ba4c9ad461316e834b2d64b77e1ca88e"><code>dba3966</code></a> Remove node6 support, add node12 to build (<a href="https://github-redirect.dependabot.com/http-party/node-http-proxy/issues/1397">#1397</a>)</li> <li>See full diff in <a href="https://github.com/http-party/node-http-proxy/compare/1.18.0...1.18.1">compare view</a></li> </ul> </details> <br />

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Bumps lodash from 4.17.15 to 4.17.19. <details> <summary>Release notes</summary> <p><em>Sourced from <a href="https://github.com/lodash/lodash/releases">lodash's releases</a>.</em></p> <blockquote> <h2>4.17.16</h2> </blockquote> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/lodash/lodash/commit/d7fbc52ee0466a6d248f047b5d5c3e6d1e099056"><code>d7fbc52</code></a> Bump to v4.17.19</li> <li><a href="https://github.com/lodash/lodash/commit/2e1c0f22f425e9c013815b2cd7c2ebd51f49a8d6"><code>2e1c0f2</code></a> Add npm-package</li> <li><a href="https://github.com/lodash/lodash/commit/1b6c282299f4e0271f932b466c67f0f822aa308e"><code>1b6c282</code></a> Bump to v4.17.18</li> <li><a href="https://github.com/lodash/lodash/commit/a370ac81408de2da77a82b3c4b61a01a3b9c2fac"><code>a370ac8</code></a> Bump to v4.17.17</li> <li><a href="https://github.com/lodash/lodash/commit/1144918f3578a84fcc4986da9b806e63a6175cbb"><code>1144918</code></a> Rebuild lodash and docs</li> <li><a href="https://github.com/lodash/lodash/commit/3a3b0fd339c2109563f7e8167dc95265ed82ef3e"><code>3a3b0fd</code></a> Bump to v4.17.16</li> <li><a href="https://github.com/lodash/lodash/commit/c84fe82760fb2d3e03a63379b297a1cc1a2fce12"><code>c84fe82</code></a> fix(zipObjectDeep): prototype pollution (<a href="https://github-redirect.dependabot.com/lodash/lodash/issues/4759">#4759</a>)</li> <li><a href="https://github.com/lodash/lodash/commit/e7b28ea6cb17b4ca021e7c9d66218c8c89782f32"><code>e7b28ea</code></a> Sanitize sourceURL so it cannot affect evaled code (<a href="https://github-redirect.dependabot.com/lodash/lodash/issues/4518">#4518</a>)</li> <li><a href="https://github.com/lodash/lodash/commit/0cec225778d4ac26c2bac95031ecc92a94f08bbb"><code>0cec225</code></a> Fix lodash.isEqual for circular references (<a href="https://github-redirect.dependabot.com/lodash/lodash/issues/4320">#4320</a>) (<a href="https://github-redirect.dependabot.com/lodash/lodash/issues/4515">#4515</a>)</li> <li><a href="https://github.com/lodash/lodash/commit/94c3a8133cb4fcdb50db72b4fd14dd884b195cd5"><code>94c3a81</code></a> Document matches* shorthands for over* methods (<a href="https://github-redirect.dependabot.com/lodash/lodash/issues/4510">#4510</a>) (<a href="https://github-redirect.dependabot.com/lodash/lodash/issues/4514">#4514</a>)</li> <li>Additional commits viewable in <a href="https://github.com/lodash/lodash/compare/4.17.15...4.17.19">compare view</a></li> </ul> </details> <details> <summary>Maintainer changes</summary> <p>This version was pushed to npm by <a href="https://www.npmjs.com/~mathias">mathias</a>, a new releaser for lodash since your current version.</p> </details> <br />

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Bumps lodash from 4.17.10 to 4.17.20. <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/lodash/lodash/commit/ded9bc66583ed0b4e3b7dc906206d40757b4a90a"><code>ded9bc6</code></a> Bump to v4.17.20.</li> <li><a href="https://github.com/lodash/lodash/commit/63150ef7645ac07961b63a86490f419f356429aa"><code>63150ef</code></a> Documentation fixes.</li> <li><a href="https://github.com/lodash/lodash/commit/00f0f62a979d2f5fa0287c06eae70cf9a62d8794"><code>00f0f62</code></a> test.js: Remove trailing comma.</li> <li><a href="https://github.com/lodash/lodash/commit/846e434c7a5b5692c55ebf5715ed677b70a32389"><code>846e434</code></a> Temporarily use a custom fork of <code>lodash-cli</code>.</li> <li><a href="https://github.com/lodash/lodash/commit/5d046f39cbd27f573914768e3b36eeefcc4f1229"><code>5d046f3</code></a> Re-enable Travis tests on <code>4.17</code> branch.</li> <li><a href="https://github.com/lodash/lodash/commit/aa816b36d402a1ad9385142ce7188f17dae514fd"><code>aa816b3</code></a> Remove <code>/npm-package</code>.</li> <li><a href="https://github.com/lodash/lodash/commit/d7fbc52ee0466a6d248f047b5d5c3e6d1e099056"><code>d7fbc52</code></a> Bump to v4.17.19</li> <li><a href="https://github.com/lodash/lodash/commit/2e1c0f22f425e9c013815b2cd7c2ebd51f49a8d6"><code>2e1c0f2</code></a> Add npm-package</li> <li><a href="https://github.com/lodash/lodash/commit/1b6c282299f4e0271f932b466c67f0f822aa308e"><code>1b6c282</code></a> Bump to v4.17.18</li> <li><a href="https://github.com/lodash/lodash/commit/a370ac81408de2da77a82b3c4b61a01a3b9c2fac"><code>a370ac8</code></a> Bump to v4.17.17</li> <li>Additional commits viewable in <a href="https://github.com/lodash/lodash/compare/4.17.10...4.17.20">compare view</a></li> </ul> </details> <details> <summary>Maintainer changes</summary> <p>This version was pushed to npm by <a href="https://www.npmjs.com/~bnjmnt4n">bnjmnt4n</a>, a new releaser for lodash since your current version.</p> </details> <br />

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Bumps eslint-utils from 1.3.1 to 1.4.3. <details> <summary>Release notes</summary> <p><em>Sourced from <a href="https://github.com/mysticatea/eslint-utils/releases">eslint-utils's releases</a>.</em></p> <blockquote> <h2>v1.4.3</h2> <h2>🐛 Bug fixes</h2> <ul> <li>8f9e481ecc1204c7a1331b697f97903f90c75154 fixed false positive of <code>ReferenceTracker</code>.</li> </ul> <h2>v1.4.2</h2> <h2>🐛 Bug fixes</h2> <ul> <li>e4cb01498df6096b66edb0c78965ee6f47d3ac77 fixed a regression of the previous release.</li> </ul> <h2>v1.4.1</h2> <h2>🐛 Bug fixes</h2> <ul> <li>c119e832952c8c653bd4f21e39eb9f7ce48e5947 fixed <code>getStaticValue()</code> function to handle <code>null</code> literal correctly even if runtimes don't support BigInt natively.</li> <li>587cca2f82c245f5fc4a8b9fb2cf6b35c0d02552 fixed <code>getStringIfConstant()</code> function to handle regular expression literals and BigInt literals even if runtimes don't support those.</li> <li>08158db1c98fd71cf0f32ddefbc147e2620e724c fixed GHSA-3gx7-xhv7-5mx3.</li> </ul> <h2>v1.4.0</h2> <h2>✨ Enhancements</h2> <ul> <li>66456c5356310fc4309b4fe2756995f27b907747 (and ebf5a8378d3f0a20a74adb158a7112cb616bce44, aac472e815551688d23cc8fd88f9044dbf276804) added <code>isParenthesized()</code> function that checks if a given node is parenthesized or not.</li> <li>4f8407dd6cd52274ba115b3a8558153ec6d799a7 (and cb518c70ee037722f802d808bbbe93da83f07fb3) added <code>hasSideEffect()</code> function that checks if a given node may have side-effects or not.</li> </ul> </blockquote> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/mysticatea/eslint-utils/commit/23f4ddc58eda5e6aec3d6a43c6266acbe19345cd"><code>23f4ddc</code></a> 🔖 1.4.3</li> <li><a href="https://github.com/mysticatea/eslint-utils/commit/8f9e481ecc1204c7a1331b697f97903f90c75154"><code>8f9e481</code></a> 🐛 fix reference tracker false positive</li> <li><a href="https://github.com/mysticatea/eslint-utils/commit/663327835abfb1f62fc6fc5d69028457e11b5f80"><code>6633278</code></a> ⚒ fix test scripts</li> <li><a href="https://github.com/mysticatea/eslint-utils/commit/7c8e67c22f7222685a6a9154ba5eec2ac4896a3e"><code>7c8e67c</code></a> ⚒ fix build scripts</li> <li><a href="https://github.com/mysticatea/eslint-utils/commit/41ff95e728db2c52122ae3dad42997dccd223388"><code>41ff95e</code></a> ⚒ update dependencies</li> <li><a href="https://github.com/mysticatea/eslint-utils/commit/49420121ff4d2b4758d4016848055c1631389faa"><code>4942012</code></a> ⚒ fix build scripts</li> <li><a href="https://github.com/mysticatea/eslint-utils/commit/f1c8d02b3fd190a97e39603929c0aabe36c9904f"><code>f1c8d02</code></a> ⚒ update build scripts</li> <li><a href="https://github.com/mysticatea/eslint-utils/commit/a88598a74f0d71376447c4ecb6b56b27272f3992"><code>a88598a</code></a> Create FUNDING.yml</li> <li><a href="https://github.com/mysticatea/eslint-utils/commit/4e1bc077c2a6bb00538d66b69a63c24de3463bed"><code>4e1bc07</code></a> 1.4.2</li> <li><a href="https://github.com/mysticatea/eslint-utils/commit/e4cb01498df6096b66edb0c78965ee6f47d3ac77"><code>e4cb014</code></a> 🐛 add null test</li> <li>Additional commits viewable in <a href="https://github.com/mysticatea/eslint-utils/compare/v1.3.1...v1.4.3">compare view</a></li> </ul> </details> <br />

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Bumps acorn from 5.7.2 to 5.7.4. <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/acornjs/acorn/commit/6370e90067552022710190319cbbbd8c43001957"><code>6370e90</code></a> Mark version 5.7.4</li> <li><a href="https://github.com/acornjs/acorn/commit/fbc15b1344f6dfb992f67b4bbf1357436247c8a0"><code>fbc15b1</code></a> More rigorously check surrogate pairs in regexp validator</li> <li><a href="https://github.com/acornjs/acorn/commit/910e62bbda199ce7acc5de10d374afa0f6fcf7d6"><code>910e62b</code></a> Mark version 5.7.3</li> <li><a href="https://github.com/acornjs/acorn/commit/3442a80d2cdfa672ae2b6ccd6c2bd5c167914db4"><code>3442a80</code></a> Make generate-identifier-regex capable of rewriting src/identifier.js</li> <li><a href="https://github.com/acornjs/acorn/commit/22b22f36330d41a20225f26aab314d3e9d5452bd"><code>22b22f3</code></a> Raise specific errors for unterminated template literals</li> <li><a href="https://github.com/acornjs/acorn/commit/1461c7c5778933514126216fb3ec22d8dfc57feb"><code>1461c7c</code></a> Fix a lint error</li> <li><a href="https://github.com/acornjs/acorn/commit/0c12f63f171d8a6c8b354de54a7ff4a8d5fa486e"><code>0c12f63</code></a> Fix tokenizing of regexps after .of</li> <li><a href="https://github.com/acornjs/acorn/commit/832c3081da0df0a586cfc3ea96040f64252088b7"><code>832c308</code></a> Fix 404 url</li> <li>See full diff in <a href="https://github.com/acornjs/acorn/compare/5.7.2...5.7.4">compare view</a></li> </ul> </details> <br />

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Bumps js-yaml from 3.12.0 to 3.14.0. <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/nodeca/js-yaml/blob/master/CHANGELOG.md">js-yaml's changelog</a>.</em></p> <blockquote> <h2>[3.14.0] - 2020-05-22</h2> <h3>Changed</h3> <ul> <li>Support <code>safe/loadAll(input, options)</code> variant of call.</li> <li>CI: drop outdated nodejs versions.</li> <li>Dev deps bump.</li> </ul> <h3>Fixed</h3> <ul> <li>Quote <code>=</code> in plain scalars <a href="https://github-redirect.dependabot.com/nodeca/js-yaml/issues/519">#519</a>.</li> <li>Check the node type for <code>!<?></code> tag in case user manually specifies it.</li> <li>Verify that there are no null-bytes in input.</li> <li>Fix wrong quote position when writing condensed flow, <a href="https://github-redirect.dependabot.com/nodeca/js-yaml/issues/526">#526</a>.</li> </ul> <h2>[3.13.1] - 2019-04-05</h2> <h3>Security</h3> <ul> <li>Fix possible code execution in (already unsafe) <code>.load()</code>, <a href="https://github-redirect.dependabot.com/nodeca/js-yaml/issues/480">#480</a>.</li> </ul> <h2>[3.13.0] - 2019-03-20</h2> <h3>Security</h3> <ul> <li>Security fix: <code>safeLoad()</code> can hang when arrays with nested refs used as key. Now throws exception for nested arrays. <a href="https://github-redirect.dependabot.com/nodeca/js-yaml/issues/475">#475</a>.</li> </ul> <h2>[3.12.2] - 2019-02-26</h2> <h3>Fixed</h3> <ul> <li>Fix <code>noArrayIndent</code> option for root level, <a href="https://github-redirect.dependabot.com/nodeca/js-yaml/issues/468">#468</a>.</li> </ul> <h2>[3.12.1] - 2019-01-05</h2> <h3>Added</h3> <ul> <li>Added <code>noArrayIndent</code> option, <a href="https://github-redirect.dependabot.com/nodeca/js-yaml/issues/432">#432</a>.</li> </ul> </blockquote> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/nodeca/js-yaml/commit/34e5072f43fd36b08aaaad433da73c10d47c41e5"><code>34e5072</code></a> 3.14.0 released</li> <li><a href="https://github.com/nodeca/js-yaml/commit/7b25c83a6dc77097c2bf14bf714e168f60ee199b"><code>7b25c83</code></a> Browser files rebuild</li> <li><a href="https://github.com/nodeca/js-yaml/commit/6f7347396867b8dcfc042722c2aae810dfe4caae"><code>6f73473</code></a> Dev deps bump</li> <li><a href="https://github.com/nodeca/js-yaml/commit/0c293491d903cddcd41b41c165bc45eeb9a8d720"><code>0c29349</code></a> Travis-CI: drop old nodejs versions</li> <li><a href="https://github.com/nodeca/js-yaml/commit/10be97ebbd588e68907e6c67e0b3843a4caab475"><code>10be97e</code></a> fix(loader): Add support for <code>safe/loadAll(input, options)</code></li> <li><a href="https://github.com/nodeca/js-yaml/commit/d6983dd4291849b2854e8d26e1beb302edfd4c76"><code>d6983dd</code></a> Fix issue <a href="https://github-redirect.dependabot.com/nodeca/js-yaml/issues/526">#526</a>: wrong quote position writing condensed flow (<a href="https://github-redirect.dependabot.com/nodeca/js-yaml/issues/527">#527</a>)</li> <li><a href="https://github.com/nodeca/js-yaml/commit/93fbf7d4ddecea60709c8379397247af28f11e10"><code>93fbf7d</code></a> fix issue 526 (wrong quote position writing condensed flow)</li> <li><a href="https://github.com/nodeca/js-yaml/commit/e569cc70ec9b41760d0d37b805a1d9b3ada519ca"><code>e569cc7</code></a> readme: update titelift info</li> <li><a href="https://github.com/nodeca/js-yaml/commit/8fb29059223b5f700dec4ea09b3d5550cd3a8e32"><code>8fb2905</code></a> changelog format update</li> <li><a href="https://github.com/nodeca/js-yaml/commit/33c2236d702fee430cac27ab41d75069b6647765"><code>33c2236</code></a> Verify that there are no null-bytes in input</li> <li>Additional commits viewable in <a href="https://github.com/nodeca/js-yaml/compare/3.12.0...3.14.0">compare view</a></li> </ul> </details> <br />

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This doesn't feel as "clean" as the rest of the codebase but I ran into an issue where event.currentTarget is null when the callback is called after debouncing.

I believe that browsers lose the reference to currentTarget after the initial event handler scope. A note on the mdn article for Event.currentTarget states:

The value of event.currentTarget is only available while the event is being handled. If you console.log() the event object, storing it in a variable, and then look for the currentTarget key in the console, its value will be null. Instead, you can either directly console.log(event.currentTarget) to be able to view it in the console or use the debugger statement, which will pause the execution of your code thus showing you the value of event.currentTarget.

@muan pointed out we do something similar in delegated-events to rectify the issue.

Interested in hearing thoughts on this approach.

Bumps lodash from 4.17.15 to 4.17.19. <details> <summary>Release notes</summary> <p><em>Sourced from <a href="https://github.com/lodash/lodash/releases">lodash's releases</a>.</em></p> <blockquote> <h2>4.17.16</h2> </blockquote> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/lodash/lodash/commit/d7fbc52ee0466a6d248f047b5d5c3e6d1e099056"><code>d7fbc52</code></a> Bump to v4.17.19</li> <li><a href="https://github.com/lodash/lodash/commit/2e1c0f22f425e9c013815b2cd7c2ebd51f49a8d6"><code>2e1c0f2</code></a> Add npm-package</li> <li><a href="https://github.com/lodash/lodash/commit/1b6c282299f4e0271f932b466c67f0f822aa308e"><code>1b6c282</code></a> Bump to v4.17.18</li> <li><a href="https://github.com/lodash/lodash/commit/a370ac81408de2da77a82b3c4b61a01a3b9c2fac"><code>a370ac8</code></a> Bump to v4.17.17</li> <li><a href="https://github.com/lodash/lodash/commit/1144918f3578a84fcc4986da9b806e63a6175cbb"><code>1144918</code></a> Rebuild lodash and docs</li> <li><a href="https://github.com/lodash/lodash/commit/3a3b0fd339c2109563f7e8167dc95265ed82ef3e"><code>3a3b0fd</code></a> Bump to v4.17.16</li> <li><a href="https://github.com/lodash/lodash/commit/c84fe82760fb2d3e03a63379b297a1cc1a2fce12"><code>c84fe82</code></a> fix(zipObjectDeep): prototype pollution (<a href="https://github-redirect.dependabot.com/lodash/lodash/issues/4759">#4759</a>)</li> <li><a href="https://github.com/lodash/lodash/commit/e7b28ea6cb17b4ca021e7c9d66218c8c89782f32"><code>e7b28ea</code></a> Sanitize sourceURL so it cannot affect evaled code (<a href="https://github-redirect.dependabot.com/lodash/lodash/issues/4518">#4518</a>)</li> <li><a href="https://github.com/lodash/lodash/commit/0cec225778d4ac26c2bac95031ecc92a94f08bbb"><code>0cec225</code></a> Fix lodash.isEqual for circular references (<a href="https://github-redirect.dependabot.com/lodash/lodash/issues/4320">#4320</a>) (<a href="https://github-redirect.dependabot.com/lodash/lodash/issues/4515">#4515</a>)</li> <li><a href="https://github.com/lodash/lodash/commit/94c3a8133cb4fcdb50db72b4fd14dd884b195cd5"><code>94c3a81</code></a> Document matches* shorthands for over* methods (<a href="https://github-redirect.dependabot.com/lodash/lodash/issues/4510">#4510</a>) (<a href="https://github-redirect.dependabot.com/lodash/lodash/issues/4514">#4514</a>)</li> <li>Additional commits viewable in <a href="https://github.com/lodash/lodash/compare/4.17.15...4.17.19">compare view</a></li> </ul> </details> <details> <summary>Maintainer changes</summary> <p>This version was pushed to npm by <a href="https://www.npmjs.com/~mathias">mathias</a>, a new releaser for lodash since your current version.</p> </details> <br />

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Most Linux distributions come with support for Emoji by installing Noto. Adding fallback images can make things worse for linux users.

Fixes #2

For example here is Pop!_OS 20.04 (essentially Ubuntu) running Firefox, with native emoji support:

🦖😁

We need to know how many users this would affect before this can merge so closing for now.

solves #4

Closing as stale.

I agree that this is a layering violation and outside the scope of mini-throttle. The caller to throttle or debounce can bind a function to the element: throttle(doSomething.bind(null, el)).

I think that this code makes sense in delegated-events since that's dealing with events

This is in place not for convenience but because it's the contract for event dispatch. The currentTarget value must be null after dispatch completes.

Using string concatentation with user controlled input to build a selector query results in syntax errors.

SyntaxError: Failed to execute 'querySelector' on 'Element': '[hotkey="""]' is not a valid selector.

Instead, query potential hotkey buttons and test their attribute against the event's key value.

Using string concatentation with user controlled input to build a selector query results in syntax errors.

SyntaxError: Failed to execute 'querySelector' on 'Element': '[hotkey="""]' is not a valid selector.

Instead, query potential hotkey buttons and test their attribute against the event's key value.

How would you recommend most companies/projects go about patching this for iOS 11+10?

We need to deal with the iOS 10 implementation of fetch on its own terms without patching over pieces of it. The approach we used was a module similar to this, mildly outdated, example. We called into the module function rather than using window.fetch directly.

When we stopped supporting browser versions with the previous credentials default of omit, we replaced calls to the module function with window.fetch.

Backport of #24147

See that PR for details.

Notes: none.

Originally posted by @trop in https://github.com/electron/electron/pull/24176