es.regexp.sticky feature verification fails #1008

chenyulun · 2021-11-17T02:41:27Z

es.regexp.sticky
ua: Mozilla/5.0 (Linux; U; Android 11; zh-CN; M2102K1AC Build/RKQ1.201112.002) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/57.0.2987.108 UCBrowser/12.5.5.1035 Mobile Safari/537.36

'es.regexp.sticky': function () {
    return new RegExp('a', 'y').sticky === true; // false
}

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/sticky
But the examples on the website can pass the test

{
'es.regexp.sticky': function () {
    return new RegExp('a', 'y').sticky === true; // false
}
}
```js
{
  'es.regexp.sticky': function () {
    // return new RegExp('a', 'y').sticky === true;
    var str = '#foo#';
    var regex = /foo/y;
    regex.lastIndex = 1;
    var flag1 = regex.test(str)
    regex.lastIndex = 5;
    return !regex.test(str) && flag1; // true
  }
}

by the way: In this browser,
es.regexp.constructor:

var re1 = /a/g;
RegExp(re1, 'i') == '/a/i' // false

The full core-JS patch is still not supported

The text was updated successfully, but these errors were encountered:

zloirock · 2021-11-17T11:13:51Z

Sorry, I'm not sure that I understood the issue.

I have no UC Browser for testing, but in Chrome 57 both of your examples work fine.

BTW we can't use /foo/y in tests or after polyfilling since it's an extension of JS syntax and polyfills can't do it, it's a work of transpilers, however, I don't think that it's related to this issue.

Could you explain what do you mean? Is this just /tests/compat or you load / do something else?

zloirock · 2021-11-17T22:26:12Z

?

chenyulun · 2021-11-18T02:17:44Z

I wanted to test the compatibility of Core-JS across all versions of mobile browsers,so I added core-js-3.19.1.js to tests/compat/index.html,It just happened to test a UC browser in China, which encapsulates the chrome/57 kernel and does not support the verification of these two attributes. (How to test whether it is really Chrome /57),
I think these two unsupported uses, should be very few people use, and we do not have other Chrome /57 mobile devices, so ignore,
cp core-js-bundle/index.js into Project root

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="./core-js-bundle/index.js"></script>
</head>
<body>
  <div id="ua"></div>
  <div id="regexp_constructor"></div>
  <div id="regexp_sticky"></div>
</body>
<script>
  var ua = document.getElementById('ua');
  ua.innerHTML ='ua:' + navigator.userAgent; // + '<br/>' + 'appVersion:' + navigator.appVersion
  var sticky = document.getElementById('regexp_constructor');
  sticky.innerHTML = "es.regexp.constructor(RegExp(/a/g, 'i')):" + (RegExp(/a/g, 'i'));
  var sticky = document.getElementById('regexp_sticky');
  sticky.innerHTML = "es.regexp.sticky(new RegExp('a', 'y').sticky):" + (new RegExp('a', 'y').sticky);
</script>
</html>

chrome:

UC: chrome/57

zloirock · 2021-11-20T01:07:18Z

Thanks, interesting. As I wrote, now I have no environment where I can test it in UC browser and I have no ideas why it could fail. If you could dig it deeper and, if it's required, help to fix it - I would be happy.

chenyulun · 2021-11-22T01:43:18Z

setTimeout(() => {
  console.log(navigator.userAgent)
  const re = RegExp('a', 'y')
  console.log('re.toString:', re.toString())
  console.log('re.sticky:', re.sticky)
  var str = '#foo#';
  var regex = /foo/y;
  console.log('regex.toString:', regex.toString())
  regex.lastIndex = 1;
  console.log('lastIndex:1,', regex.test(str)); // true
  regex.lastIndex = 5;
  console.log('lastIndex:5,',regex.test(str));
}, 2000);

Android UC browser download address

chrome 56 PC

UC chrome/57

The toString method and the sticky attribute are not supported, but the functionality is supported

The chrome kernel version it uses is probably not real Chrome 57

zloirock · 2021-11-22T02:09:40Z

Interesting, thanks. We could extend UNSUPPORTED_Y logic to the .sticky flag detection. But I'm not sure is required or not to replace a native implementation that works properly, but without observable .sticky flag, to slower and not 100% complete (#810) polyfill... We can add a special case for that to the constructor, however, I'm not sure if I can do it blindly correctly enough. What do you think?

chenyulun · 2021-11-22T02:22:08Z

I think this browser patch can be abandoned！
I have no good advice on how to fix it！
Can you judge for yourself how to deal with the problem
Finally, thank you for your support

#1008

zloirock · 2021-11-22T02:34:00Z

@chenyulun could you try a fix from this branch? https://github.com/zloirock/core-js/tree/uc-sticky

chenyulun · 2021-11-22T02:41:29Z

I'll try to fix the problem, but it may take a few more days

#1008

zloirock · 2021-11-27T01:19:30Z

In UC Browser 12.10, I can't reproduce it - all tests passed. However, it's not 12.5.5.1035 like in your case.

zloirock · 2021-11-27T01:22:04Z

Just in case, I'll add a workaround for that from the branch above since it will not make something worse.

#1008

chenyulun closed this as completed Nov 17, 2021

zloirock added a commit that referenced this issue Nov 22, 2021

try to fix broken UC browser RegExp#sticky

babb8fc

#1008

zloirock added a commit that referenced this issue Nov 22, 2021

try to fix broken UC browser RegExp#sticky

13fca9a

#1008

zloirock added a commit that referenced this issue Nov 27, 2021

try to fix broken UC browser RegExp#sticky

1ed2bd1

#1008

zloirock mentioned this issue Nov 27, 2021

Added a workaround for a UC Browser specific version bug with unobservable RegExp#sticky flag #1015

Merged

snyk-bot mentioned this issue Jan 29, 2022

[Snyk] Upgrade core-js from 2.6.12 to 3.20.2 gopuff/gopuff-OrderStatusDemo#5

Open

snyk-bot mentioned this issue Feb 22, 2022

[Snyk] Upgrade core-js from 3.18.0 to 3.20.3 dfds/blaster#233

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es.regexp.sticky feature verification fails #1008

es.regexp.sticky feature verification fails #1008

chenyulun commented Nov 17, 2021 •

edited

zloirock commented Nov 17, 2021 •

edited

zloirock commented Nov 17, 2021

chenyulun commented Nov 18, 2021 •

edited

zloirock commented Nov 20, 2021 •

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chenyulun commented Nov 22, 2021

zloirock commented Nov 22, 2021

chenyulun commented Nov 22, 2021

zloirock commented Nov 22, 2021

chenyulun commented Nov 22, 2021

zloirock commented Nov 27, 2021 •

edited

zloirock commented Nov 27, 2021

es.regexp.sticky feature verification fails #1008

es.regexp.sticky feature verification fails #1008

Comments

chenyulun commented Nov 17, 2021 • edited

The full core-JS patch is still not supported

zloirock commented Nov 17, 2021 • edited

zloirock commented Nov 17, 2021

chenyulun commented Nov 18, 2021 • edited

zloirock commented Nov 20, 2021 • edited

chenyulun commented Nov 22, 2021

zloirock commented Nov 22, 2021

chenyulun commented Nov 22, 2021

zloirock commented Nov 22, 2021

chenyulun commented Nov 22, 2021

zloirock commented Nov 27, 2021 • edited

zloirock commented Nov 27, 2021

chenyulun commented Nov 17, 2021 •

edited

zloirock commented Nov 17, 2021 •

edited

chenyulun commented Nov 18, 2021 •

edited

zloirock commented Nov 20, 2021 •

edited

zloirock commented Nov 27, 2021 •

edited