[Koha-bugs] [Bug 35718] Remove ES6 warnings from JavaScript system preferences

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=35718

--- Comment #1 from Lucas Gass <lucas at bywatersolutions.com> ---
Created attachment 160584
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https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=160584&action=edit
Bug 35718: Remove ES6 warns from JS system preferences

To test:
1. Add some JS like this to any of the UserJS system preferences:

$(document).ready( function() {
    let something = 1;
    const another_thing = 2;

    let an_arrow_function = (a, b) => a + b;
    console.log( an_arrow_function(something, another_thing) );
});

2. Notice the icons and warnings to the left of the line numbers:

let is available in ES6
const is available in ES6
arrow_function_syntax is available in ES6

3. APPLY PATCH
4. Try steps 1 and 2 again, the warnings should be gone.
5. Check that the JavaScript still works, in my example it should console.log
3.

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