Explaining it in the rudest way possible.
Import the S02PacketChat as @Aftery and @Plumer-Man said. var S02PacketChat = Java.type("net.minecraft.network.play.server.S02PacketChat"); Check if the packet is S02PacketChat as @Larissa said, add this in module.on("packet", function(e) { if (e.getPacket() instanceof S02PacketChat) { In order to read the message, you need to add this variable in the same place. var Message = e.getPacket().getChatComponent().getUnformattedText(); To check if the Message contains the string of your preference, you have to add this in the same place... again: if (Message.toLowerCase().contains("string of your preference")) { e.cancelEvent(); } // change the "string of your preference" to what you want.
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Ximatendr
@Ximatendr