Copy/Paste for noVNC Proxmox

noVNCCopyPasteProxmox.user.js

// ==UserScript==
// @name         noVNC Paste for Proxmox
// @namespace    http://tampermonkey.net/
// @version      0.2a
// @description  Pastes text into a noVNC window (for use with Proxmox specifically)
// @author       Chester Enright
// @match        https://*
// @include      /^.*novnc.*/
// @require http://code.jquery.com/jquery-3.3.1.min.js
// @grant        none
// ==/UserScript==
const delay = 1
;(function () {
    'use strict'
    window.sendString = function(text) {

        var el = document.getElementById("canvas-id")
        text.split("").forEach(x=>{
            setTimeout(()=>{
                 var needs_shift = x.match(/[A-Z!@#$%^&*()_+{}:\"<>?~|]/)
                 let evt
                 if (needs_shift) {

                     evt = new KeyboardEvent("keydown", {keyCode: 16})
                     el.dispatchEvent(evt)
                     evt = new KeyboardEvent("keydown", {key: x, shiftKey: true})
                     el.dispatchEvent(evt)
                     evt = new KeyboardEvent("keyup", {keyCode: 16})
                     el.dispatchEvent(evt)

                 }else{
                     evt = new KeyboardEvent("keydown", {key: x})
                }
                el.dispatchEvent(evt)
            }, delay)
        })

    }


    $(document).ready(function() {
        setTimeout(()=>{
            console.log("Starting up noVNC Copy/Paste (for Proxmox)")

            $("canvas").attr("id", "canvas-id")

            $("canvas").on("mousedown", (e)=>{
                if(e.button == 2){ // Right Click
                    navigator.clipboard.readText().then(text =>{
                        window.sendString(text)
                    })
                }
            })
        }, 1000);
    })


})()

Hello all,
Thank you for this excellent script !
I forked your script to adapt french mac keyboard like this one :

I have to work more to be able to add all the keys but it's a good start.

Working key in french mac keyboard :
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890*=-_+&"(;/

Not working for now : :)[]{}!\' .....

    const keyMap = {

        'a': { key: 'q', keyCode: 65 }, 'b': { key: 'b', keyCode: 66 }, 'c': { key: 'c', keyCode: 67 },
        'd': { key: 'd', keyCode: 68 }, 'e': { key: 'e', keyCode: 69 }, 'f': { key: 'f', keyCode: 70 },
        'g': { key: 'g', keyCode: 71 }, 'h': { key: 'h', keyCode: 72 }, 'i': { key: 'i', keyCode: 73 },
        'j': { key: 'j', keyCode: 74 }, 'k': { key: 'k', keyCode: 75 }, 'l': { key: 'l', keyCode: 76 },
        'm': { key: ':', keyCode: 191 }, 'n': { key: 'n', keyCode: 78 }, 'o': { key: 'o', keyCode: 79 },
        'p': { key: 'p', keyCode: 80 }, 'q': { key: 'a', keyCode: 81 }, 'r': { key: 'r', keyCode: 82 },
        's': { key: 's', keyCode: 83 }, 't': { key: 't', keyCode: 84 }, 'u': { key: 'u', keyCode: 85 },
        'v': { key: 'v', keyCode: 86 }, 'w': { key: 'z', keyCode: 87 }, 'x': { key: 'x', keyCode: 88 },
        'y': { key: 'y', keyCode: 89 }, 'z': { key: 'w', keyCode: 90 },
        'A': { key: 'Q', keyCode: 65, shiftKey: true }, 'B': { key: 'B', keyCode: 66, shiftKey: true },
        'C': { key: 'C', keyCode: 67, shiftKey: true }, 'D': { key: 'D', keyCode: 68, shiftKey: true },
        'E': { key: 'E', keyCode: 69, shiftKey: true }, 'F': { key: 'F', keyCode: 70, shiftKey: true },
        'G': { key: 'G', keyCode: 71, shiftKey: true }, 'H': { key: 'H', keyCode: 72, shiftKey: true },
        'I': { key: 'I', keyCode: 73, shiftKey: true }, 'J': { key: 'J', keyCode: 74, shiftKey: true },
        'K': { key: 'K', keyCode: 75, shiftKey: true }, 'L': { key: 'L', keyCode: 76, shiftKey: true },
        'M': { key: ':', keyCode: 220, shiftKey: true }, 'N': { key: 'N', keyCode: 78, shiftKey: true },
        'O': { key: 'O', keyCode: 79, shiftKey: true }, 'P': { key: 'P', keyCode: 80, shiftKey: true },
        'Q': { key: 'A', keyCode: 81, shiftKey: true }, 'R': { key: 'R', keyCode: 82, shiftKey: true },
        'S': { key: 'S', keyCode: 83, shiftKey: true }, 'T': { key: 'T', keyCode: 84, shiftKey: true },
        'U': { key: 'U', keyCode: 85, shiftKey: true }, 'V': { key: 'V', keyCode: 86, shiftKey: true },
        'W': { key: 'Z', keyCode: 87, shiftKey: true }, 'X': { key: 'X', keyCode: 88, shiftKey: true },
        'Y': { key: 'Y', keyCode: 89, shiftKey: true }, 'Z': { key: 'W', keyCode: 90, shiftKey: true },
        '1': { key: '&', keyCode: 49, shiftKey: true }, '2': { key: 'é', keyCode: 50, shiftKey: true },
        '3': { key: '"', keyCode: 51, shiftKey: true }, '4': { key: '\'', keyCode: 52, shiftKey: true },
        '5': { key: '(', keyCode: 53, shiftKey: true }, '6': { key: '§', keyCode: 54, shiftKey: true },
        '7': { key: 'è', keyCode: 55, shiftKey: true }, '8': { key: '!', keyCode: 56, shiftKey: true },
        '9': { key: 'ç', keyCode: 57, shiftKey: true }, '0': { key: 'à', keyCode: 48, shiftKey: true },
        '=': { key: '=', keyCode: 187 }, // OK
        '(': { key: '(', keyCode: 53, }, // OK
        '&': { key: '&', keyCode: 49,}, // OK
        ';': { key: ',', keyCode: 188 }, // OK
        '"': { key: '"', keyCode: 51, }, // OK
        '+': { key: '+', keyCode: 187, shiftKey: true }, // OK
        '_': { key: '_', keyCode: 56 }, // OK
        '*': { key: '\\', keyCode: 220}, // OK
        '-': { key: '^', keyCode: 219 }, // OK
        '/': { key: '.', keyCode: 188, shiftKey: true }, // OK
/*        '/': { key: '/', keyCode: 191 },
        ':': { key: '/', keyCode: 186 },
        ')': { key: '°', keyCode: 48 },
        '[': { key: '^', keyCode: 219 },
        ']': { key: '$', keyCode: 221 },
        '{': { key: '^', keyCode: 219 },
        '}': { key: '4', keyCode: 221 },
        '!': { key: '', keyCode: 56 },
        '\'': { key: '4', keyCode: 52 }, */

    };

For anyone interested, I removed the clipboard dependency by changing:

Thank you too @flightless22, I used your code too.

merci beaucoup <3 you're the best @pesposito