JavaScript version?

[SPlatten]

How out of date is the implementation of JavaScript with Qt 5.15.2 ?

Today I was working with a script and wanted to insert an item at the start of an array, the array already had content, there is a way of inserting an item into the front of the array using the unshift function. However this doesn't work as I've tried it today.

Here is an example:

var arySimon = [1,2,3,4];
arySimon.unshift(99);

Should result in arySimon containing:

99,1,2,3,4

Nothing is happening, unshift isn't doing anything. I'd just like to know for future reference which version of JavaScript is in use.

[KroMignon]

@SPlatten said in JavaScript version?:

How out of date is the implementation of JavaScript with Qt 5.15.2 ?

You can find it out here:

• https://doc.qt.io/qt-5/qtqml-javascript-hostenvironment.html
• https://doc.qt.io/qt-5/qtqml-javascript-functionlist.html

[SPlatten]

@KroMignon , thank you

[J.Hilk]

Matter of fact is, it was added in the 6th version of ECMA and Qml uses the 7th one

So it should be part of the JS engine, and a quick test

    Component.onCompleted:{
        var array1 = [1, 2, 3];
        console.log(array1)
        array1.unshift(5)
        console.log(array1);
    }

confirms with the output:

qml: [1,2,3]
qml: [5,1,2,3]

[KroMignon]

@SPlatten said in JavaScript version?:

thank you

Your welcome, by the way I just made a little test:

var myList = [1, 2, 3, 4]
console.log("List start: " + myList)
myList.unshift(99)
console.log("List unshifted: " + myList)

Returns in console window (with Qt 5.12.10):

List start: 1,2,3,4
List unshifted: 99,1,2,3,4

[SPlatten]

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