Convert JS New() To Brython ?

[BobSquarePants]

Hi,

On the Brython documention page about JSobject

I see that Brython support a way to "translate" the JS new().

I would like to convert this

const doc = new DOMParser().parseFromString(responseText, 'text/html');

To Byrhton

I've tried

doc = window.new().DOMParser().parseFromString(s, 'text/html')
'''
output: 
Uncaught (in promise) __dir__:
'''

doc = window.DOMParser().parseFromString(s, 'text/html')
'''
output: 
TypeError: DOMParser constructor: 'new' is require
'''

Any ideas ?

[ed2050]

Hi @BobSquarePants, yes just do window.DOMParser.new () to create the parser object, then call whatever methods you want on it.

I use this helper function in my brython code:

def make_html (text) :
    'Turn a string into html nodes'
    # see https://stackoverflow.com/questions/10585029/parse-an-html-string-with-js

    parser = window.DOMParser.new ()
    html = parser.parseFromString (text, 'text/html')
    return html.body.firstElementChild

This works for most cases. However I recently noticed that it fails if text contains a header element like:

• <base href=...>
• <style> </style> (I think)
• or maybe it's <link rel="stylesheet" href=...>

Anything that gets put in html.head instead of html.body will fail. I don't use it for header nodes so I haven't gotten around to fixing it yet.

[BobSquarePants]

Thank you @ed2050 , I didn't try your solution yet, but I'll keep it warm when I will need it again.

I still need the new() function but something else

I'm binding an event to an element (input) and assign a function

def FooBar(ev):
    print(ev.target.id)

ele.bind('change', FooBar)

I would like to launch Foobar once before even a change event occur

Apparently with JS it will look like

element.dispatchEvent(new Event('change'));
//source: https://stackoverflow.com/questions/35659430/how-do-i-programmatically-trigger-an-input-event-without-jquery

I've try several way (based on your reply) but I can't make it work in Brython

ele.dispatchEvent(window.new(Event('change')))
#give error uncaught __dir__

[ed2050]

This code: window.new(Event('change')) makes a new window object. To create an Event object, do this instead: window.Event.new('change') I didn't check the rest of your code, but that will certainly fix one problem.

…

On Sat, Jan 27, 2024 at 2:29 PM BobSquarePants ***@***.***> wrote: Thank you @ed2050 <https://github.com/ed2050> , I didn't try your solution yet, but I'll keep it warm when I will need it again. I still need the new() function but something else I'm binding an event to an element (input) and assign a function def FooBar(ev): print(ev.target.id) ele.bind('change', FooBar) I would like to launch Foobar once before even a change event occur Apparently with JS it will look like element.dispatchEvent(new Event('change'));//source: https://stackoverflow.com/questions/35659430/how-do-i-programmatically-trigger-an-input-event-without-jquery I've try several way (based on your reply) but I can't make it work in Brython ele.dispatchEvent(window.new(Event('change')))#give error uncaught __dir__ — Reply to this email directly, view it on GitHub <#2289 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AIKNAODXSGB4A6DHQJAXF7TYQUFK7AVCNFSM6AAAAAA6PBG5D6VHI2DSMVQWIX3LMV43SRDJONRXK43TNFXW4Q3PNVWWK3TUHM4DENRVGUYDM> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[BobSquarePants]

Thank you @ed2050 !

I wish FrontEnd was natively Python enabled, and not only JS...