必承其重 | 欲带皇冠 2018-09-18 15:51 采纳率: 0%
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数组状态将缓存在 iOS 12 Safari 中。 这是一个 bug 还是一个功能？

Update at 2018.10.31

This bug has been fixed in iOS 12.1, have a good day~

I found a problem with Array's value state in the newly released iOS 12 Safari, for example, code like this:

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
    <title>iOS 12 Safari bugs</title>
    <script type="text/javascript">
    window.addEventListener("load", function ()
    {
        let arr = [1, 2, 3, 4, 5];
        alert(arr.join());

        document.querySelector("button").addEventListener("click", function ()
        {
            arr.reverse();
        });
    });
    </script>
</head>
<body>
    <button>Array.reverse()</button>
    <p style="color:red;">test: click button and refresh page, code:</p>
</body>
</html>

After refreshing the page, the array's value is still reversed. Is this a bug or a feature of new Safari?

Here is a demo page. Try to use it with iOS 12 Safari: https://abelyao.github.io/others/ios12-safari-bug.html

转载于:https://stackoverflow.com/questions/52390368/array-state-will-be-cached-in-ios-12-safari-is-it-a-bug-or-feature

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4条回答 默认 最新

  • 程序go 2018-09-18 18:51
    关注

    I wrote a lib to fix the bug. https://www.npmjs.com/package/array-reverse-polyfill

    This is the code:

    (function() {
  function buggy() {
    var a = [1, 2];
    return String(a) === String(a.reverse());
  }
  if(!buggy()) return;
  var r = Array.prototype.reverse;
  Array.prototype.reverse = function reverse() {
    if (Array.isArray(this)) this.length = this.length;
    return r.call(this);
  }
})();

    </div>
    评论

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