how to change the javascript version in firefox browser

-1

help -> about firefox shows firefox version 63.0(32 bit)

but my javascript version shows 1.5

http://jsfiddle.net/Ac6CT/

<script type="text/javascript">

  var jsver = 1.0;

</script>

<script language="Javascript1.1">

  jsver = 1.1;

</script>

<script language="Javascript1.2">

  jsver = 1.2;

</script>

<script language="Javascript1.3">

  jsver = 1.3;

</script>

<script language="Javascript1.4">

  jsver = 1.4;

</script>

<script language="Javascript1.5">

  jsver = 1.5;

</script>

<script language="Javascript1.6">

  jsver = 1.6;

</script>

<script language="Javascript1.7">

  jsver = 1.7;

</script>

<script language="Javascript1.8">

  jsver = 1.8;

</script>

<script language="Javascript1.9">

  jsver = 1.9;

</script>





<script type="text/javascript">

  alert(jsver);

</script>

I want to use the latest javascript version.

asked Nov 21 '18 at 5:11

Sugumar Venkatesan

2,04921332

1

the language attribute on a script element is deprecated - so your code is flawed - javascript on Mozilla supports 98% of ES6, 100% of ES2016, most of ES2017 and 2018

– Bravo
Nov 21 '18 at 5:19

add a comment |

-1

help -> about firefox shows firefox version 63.0(32 bit)

but my javascript version shows 1.5

http://jsfiddle.net/Ac6CT/

<script type="text/javascript">

  var jsver = 1.0;

</script>

<script language="Javascript1.1">

  jsver = 1.1;

</script>

<script language="Javascript1.2">

  jsver = 1.2;

</script>

<script language="Javascript1.3">

  jsver = 1.3;

</script>

<script language="Javascript1.4">

  jsver = 1.4;

</script>

<script language="Javascript1.5">

  jsver = 1.5;

</script>

<script language="Javascript1.6">

  jsver = 1.6;

</script>

<script language="Javascript1.7">

  jsver = 1.7;

</script>

<script language="Javascript1.8">

  jsver = 1.8;

</script>

<script language="Javascript1.9">

  jsver = 1.9;

</script>





<script type="text/javascript">

  alert(jsver);

</script>

I want to use the latest javascript version.

asked Nov 21 '18 at 5:11

Sugumar Venkatesan

2,04921332

1

the language attribute on a script element is deprecated - so your code is flawed - javascript on Mozilla supports 98% of ES6, 100% of ES2016, most of ES2017 and 2018

– Bravo
Nov 21 '18 at 5:19

add a comment |

-1

help -> about firefox shows firefox version 63.0(32 bit)

but my javascript version shows 1.5

http://jsfiddle.net/Ac6CT/

<script type="text/javascript">

  var jsver = 1.0;

</script>

<script language="Javascript1.1">

  jsver = 1.1;

</script>

<script language="Javascript1.2">

  jsver = 1.2;

</script>

<script language="Javascript1.3">

  jsver = 1.3;

</script>

<script language="Javascript1.4">

  jsver = 1.4;

</script>

<script language="Javascript1.5">

  jsver = 1.5;

</script>

<script language="Javascript1.6">

  jsver = 1.6;

</script>

<script language="Javascript1.7">

  jsver = 1.7;

</script>

<script language="Javascript1.8">

  jsver = 1.8;

</script>

<script language="Javascript1.9">

  jsver = 1.9;

</script>





<script type="text/javascript">

  alert(jsver);

</script>

I want to use the latest javascript version.

asked Nov 21 '18 at 5:11

Sugumar Venkatesan

2,04921332

help -> about firefox shows firefox version 63.0(32 bit)

but my javascript version shows 1.5

http://jsfiddle.net/Ac6CT/

<script type="text/javascript">

  var jsver = 1.0;

</script>

<script language="Javascript1.1">

  jsver = 1.1;

</script>

<script language="Javascript1.2">

  jsver = 1.2;

</script>

<script language="Javascript1.3">

  jsver = 1.3;

</script>

<script language="Javascript1.4">

  jsver = 1.4;

</script>

<script language="Javascript1.5">

  jsver = 1.5;

</script>

<script language="Javascript1.6">

  jsver = 1.6;

</script>

<script language="Javascript1.7">

  jsver = 1.7;

</script>

<script language="Javascript1.8">

  jsver = 1.8;

</script>

<script language="Javascript1.9">

  jsver = 1.9;

</script>





<script type="text/javascript">

  alert(jsver);

</script>

I want to use the latest javascript version.

javascript

asked Nov 21 '18 at 5:11

Sugumar Venkatesan

2,04921332

asked Nov 21 '18 at 5:11

Sugumar Venkatesan

2,04921332

asked Nov 21 '18 at 5:11

Sugumar Venkatesan

2,04921332

asked Nov 21 '18 at 5:11

Sugumar Venkatesan

2,04921332

asked Nov 21 '18 at 5:11

Sugumar Venkatesan

2,04921332

1

the language attribute on a script element is deprecated - so your code is flawed - javascript on Mozilla supports 98% of ES6, 100% of ES2016, most of ES2017 and 2018

– Bravo
Nov 21 '18 at 5:19

add a comment |

1

the language attribute on a script element is deprecated - so your code is flawed - javascript on Mozilla supports 98% of ES6, 100% of ES2016, most of ES2017 and 2018

– Bravo
Nov 21 '18 at 5:19

the language attribute on a script element is deprecated - so your code is flawed - javascript on Mozilla supports 98% of ES6, 100% of ES2016, most of ES2017 and 2018

– Bravo
Nov 21 '18 at 5:19

add a comment |

1 Answer
1

active

oldest

votes

I assume you read one of the answers over here: stackoverflow.com/questions/4271566, since it matches your code exactly. That answer is 8 years old and out of date. Seeing "1.5" is the expected behavior in the latest version of Firefox.

You can prove this by using a newer feature. For example,

const x = 5

x --> 5

The const feature was added since "Javascript 1.5," so this serves as evidence for my above claim.

answered Nov 21 '18 at 5:18

Ezekiel Elin

1,58221119

yes i can use let also, but want to know the version

– Sugumar Venkatesan
Nov 21 '18 at 5:21

1

You should not rely on the version number, and instead try to determine whether a specific feature is available. This is because browsers don't always implement every feature, even if they implement most.

– Ezekiel Elin
Nov 21 '18 at 5:25

add a comment |

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1 Answer
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1 Answer
1

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oldest

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You can prove this by using a newer feature. For example,

const x = 5

x --> 5

The const feature was added since "Javascript 1.5," so this serves as evidence for my above claim.

answered Nov 21 '18 at 5:18

Ezekiel Elin

1,58221119

yes i can use let also, but want to know the version

– Sugumar Venkatesan
Nov 21 '18 at 5:21

1

You should not rely on the version number, and instead try to determine whether a specific feature is available. This is because browsers don't always implement every feature, even if they implement most.

– Ezekiel Elin
Nov 21 '18 at 5:25

add a comment |

You can prove this by using a newer feature. For example,

const x = 5

x --> 5

The const feature was added since "Javascript 1.5," so this serves as evidence for my above claim.

answered Nov 21 '18 at 5:18

Ezekiel Elin

1,58221119

yes i can use let also, but want to know the version

– Sugumar Venkatesan
Nov 21 '18 at 5:21

1

You should not rely on the version number, and instead try to determine whether a specific feature is available. This is because browsers don't always implement every feature, even if they implement most.

– Ezekiel Elin
Nov 21 '18 at 5:25

add a comment |

You can prove this by using a newer feature. For example,

const x = 5

x --> 5

The const feature was added since "Javascript 1.5," so this serves as evidence for my above claim.

answered Nov 21 '18 at 5:18

Ezekiel Elin

1,58221119

You can prove this by using a newer feature. For example,

const x = 5

x --> 5

The const feature was added since "Javascript 1.5," so this serves as evidence for my above claim.

answered Nov 21 '18 at 5:18

Ezekiel Elin

1,58221119

answered Nov 21 '18 at 5:18

Ezekiel Elin

1,58221119

answered Nov 21 '18 at 5:18

Ezekiel Elin

1,58221119

answered Nov 21 '18 at 5:18

Ezekiel Elin

1,58221119

yes i can use let also, but want to know the version

– Sugumar Venkatesan
Nov 21 '18 at 5:21

1

You should not rely on the version number, and instead try to determine whether a specific feature is available. This is because browsers don't always implement every feature, even if they implement most.

– Ezekiel Elin
Nov 21 '18 at 5:25

add a comment |

yes i can use let also, but want to know the version

– Sugumar Venkatesan
Nov 21 '18 at 5:21

1

You should not rely on the version number, and instead try to determine whether a specific feature is available. This is because browsers don't always implement every feature, even if they implement most.

– Ezekiel Elin
Nov 21 '18 at 5:25

yes i can use let also, but want to know the version

– Sugumar Venkatesan
Nov 21 '18 at 5:21

You should not rely on the version number, and instead try to determine whether a specific feature is available. This is because browsers don't always implement every feature, even if they implement most.

– Ezekiel Elin
Nov 21 '18 at 5:25

add a comment |

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