twitch without flash on i3wm

.zshrc

[...]

function twitch() {
    i3-msg "workspace 11:twitch; append_layout /home/$USER/.i3/workspace-twitch.json" 
    chromium --app="https://www.twitch.tv/${1}/chat?popout=" &
    mpv https://www.twitch.tv/$1
}

[...]

workspace-twitch.json

// vim:ts=4:sw=4:et
{
    // splith split container with 2 children
    "border": "normal",
    "floating": "auto_off",
    "layout": "splith",
    "percent": 1,
    "type": "con",
    "nodes": [
        {
            "border": "normal",
            "current_border_width": 2,
            "floating": "auto_off",
            "geometry": {
               "height": 1080,
               "width": 1920,
               "x": 0,
               "y": 0
            },
            "name": "mpv",
            "percent": 0.8,
            "swallows": [
               {
               "class": "^mpv$"
               }
            ],
            "type": "con"
        },
        {
            "border": "normal",
            "current_border_width": 2,
            "floating": "auto_off",
            "geometry": {
               "height": 1041,
               "width": 1916,
               "x": 2,
               "y": 37
            },
            "name": "Twitch",
            "percent": 0.2,
            "swallows": [
               {
               "class": "^chromium$"
               }
            ],
            "type": "con"
        }
    ]
}