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I found there is no precision loss with IE10, which is common in other browsers like Edge, Chrome, Firefox. I'd like to know about is there any compatible workaround in IE10?

  • In IE10

    enter image description here

  • In other browsers

    enter image description here

licaomeng
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    Sounds like IE10 is not compliant with the official specification (not surprising by itself!) – CertainPerformance Nov 04 '19 at 06:06
  • I would like to know that JS engine of IE 10 (Chakra) uses the IEEE 754 floating-point format for number representation? If IEEE 754 is used then they should give a response like all other browser engines like V8. – Akshay Bande Nov 04 '19 at 06:41
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    The console might just be rounding off the number to fewer decimal places than other browsers. What do you see if you do `0.1 + 0.2 == 0.3`? – Barmar Nov 04 '19 at 07:40
  • @Barmar Good, return `false` when input `0.1 + 0.2 == 0.3`. it is just a browser console tricky. :-) – licaomeng Nov 04 '19 at 12:10

1 Answers1

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Try to clear the browser data (cache and history), then recheck it.

I have tested it on my machine, all of the browsers (include IE 9+, Microsoft Edge, Chrome and Firefox) will display the same result 0.30000000000000004, this is a Floating-Point Arithmetic issue, you could check this article and this thread.

To solve the floating point arithmetic issue, we could use the following methods:

  1. please refer to the following code:

    var x = 0.2 + 0.1;
document.getElementById("demo1").innerHTML = "0.2 + 0.1 = " + x;
var y = (0.2*10 + 0.1*10) / 10;
document.getElementById("demo2").innerHTML = "0.2 + 0.1 = " + y;

    The output as below:

    0.2 + 0.1 = 0.30000000000000004
0.2 + 0.1 = 0.3

  2. using the toFixed method.

    var x = 0.1;
var y = 0.2; 
console.log((x + y).toFixed(1));

    The result is : 0.3

Zhi Lv
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  • IE version: 10.0.9200.17457; IE update version: 10.0.30 (KB3078071); This version could reproduce it. – licaomeng Nov 04 '19 at 09:21
  • The output like [this](https://i.stack.imgur.com/wsxWa.png). Try to use (x + y).toFixed(18). If still not working, try to reset the browser setting or reinstall the browser, besides, you could also try to upgrade the IE browser version to the latest version. – Zhi Lv Nov 04 '19 at 13:17