How to set a custom icon of any client for the tasklist in awesomeWM v3.5.6?

Question

if (c.class == "Google-chrome") then
     c.icon = capi.image ( "/home/art-attack/.config/awesome/icons/chrome.png" )
end

I tried it but I always got an error i.e attempt to call field 'image' (a nil value)

{ rule = { class = "Google-chrome" },
  properties = { icon = beautiful.icon_chrome } },

Then I find another way to use properties icon in awful.rules and it worked but didn't change the icon instead it disabled the icon of that client.

Answer 1

if c.class == "Google-chrome" then
    local icon = gears.surface("path/to/chrome.png")
    return text, bg, bg_image, icon
end

Add this code before

if capi.client.focus == c then