Invalid write to global property

brut.sh

Hi all! Could u help me with my little proble? I'm begginer in qt/qml. And I'd like to change some properties of qml component from anonter qml file, and I've decided to use JS like this:
@.pragma library
sc = String;
function setSc(ss) {
sc = ss;
}

function getSc () {
return sc;
}@
Try to use it:
@import "setInfo.js" as Scr
....
onClicked: Scr.setSc("#777777")
.....
color: Scr.getSc()@
But it doesn't work
@qrc:/setInfo.js:8: ReferenceError: sc is not defined
qrc:/setInfo.js:4: Error: Invalid write to global property "sc"@
Can anyone help me? Will be grateful for u'r any solutions.

p3c0

Hi and Welcome to Qt DevNet.

Try declaring sc as var.

sierdzio

I think you forgot to add var keyword before your sc variable name:
@
var sc = String;
@

brut.sh

@var sc;
.......
qrc:/Info.qml:6:12: Unable to assign [undefined] to QColor
qrc:/main.qml:52:19: Unable to assign [undefined] to QString@
And: @var sc = String;
......
qrc:/Info.qml:6:12: Unable to assign a function to a property of any type other than var.
qrc:/main.qml:52:19: Unable to assign a function to a property of any type other than var.@

main.qml:52 @text: Scr.getSc()@
Info.qml:6 @color: Scr.getSc()@

p3c0

That is because it is not able to understand what String object is.
Assingn some string instead,
@
var sc = "green";
@

brut.sh

It works, thank u. But I can't write property by this way:
@onClicked: Scr.setSc("red")@
And it have not any errors using this.
Have any idea?

p3c0

It does write. Try this
@
onClicked: {
Scr.setSc("red")
rect.color = Scr.getSc() //assuming rect is id of that element
}
@

brut.sh

In my case, "rect" is located in another qml file, and I can not call to its property by this way. It seems, that setSc method does not work right.

p3c0

bq. It seems, that setSc method does not work right.

You can try printing the value in setSc function to check if it works.
@
function setSc(ss) {
sc = ss
console.log(sc)
}
@