@tanstack/ai-vue

npm install @tanstack/ai-vue

import { useChat, fetchServerSentEvents } from "@tanstack/ai-vue";
import {
  clientTools,
  createChatClientOptions,
  type InferChatMessages,
} from "@tanstack/ai-client";

// In <script setup>
const updateUI = updateUIDef.client((input) => {
  notification.value = input.message;
  return { success: true };
});

const tools = clientTools(updateUI);

const chatOptions = createChatClientOptions({
  connection: fetchServerSentEvents("/api/chat"),
  tools,
});

// Fully typed messages!
type ChatMessages = InferChatMessages<typeof chatOptions>;

const { messages, sendMessage, isLoading, error, addToolApprovalResponse } =
  useChat(chatOptions);

interface UseChatReturn {
  messages: DeepReadonly<ShallowRef<UIMessage[]>>;
  sendMessage: (content: string | MultimodalContent) => Promise<void>;
  append: (message: ModelMessage | UIMessage) => Promise<void>;
  addToolResult: (result: {
    toolCallId: string;
    tool: string;
    output: any;
    state?: "output-available" | "output-error";
    errorText?: string;
  }) => Promise<void>;
  addToolApprovalResponse: (response: {
    id: string;
    approved: boolean;
  }) => Promise<void>;
  reload: () => Promise<void>;
  stop: () => void;
  isLoading: DeepReadonly<ShallowRef<boolean>>;
  error: DeepReadonly<ShallowRef<Error | undefined>>;
  status: DeepReadonly<ShallowRef<ChatClientState>>;
  isSubscribed: DeepReadonly<ShallowRef<boolean>>;
  connectionStatus: DeepReadonly<ShallowRef<ConnectionStatus>>;
  sessionGenerating: DeepReadonly<ShallowRef<boolean>>;
  setMessages: (messages: UIMessage[]) => void;
  clear: () => void;
}

import {
  fetchServerSentEvents,
  fetchHttpStream,
  stream,
  type ConnectionAdapter,
} from "@tanstack/ai-vue";

<script setup lang="ts">
import { ref } from "vue";
import { useChat, fetchServerSentEvents } from "@tanstack/ai-vue";

const input = ref("");

const { messages, sendMessage, isLoading } = useChat({
  connection: fetchServerSentEvents("/api/chat"),
});

const handleSubmit = () => {
  if (input.value.trim() && !isLoading.value) {
    sendMessage(input.value);
    input.value = "";
  }
};
</script>

<template>
  <div>
    <div>
      <div v-for="message in messages.value" :key="message.id">
        <strong>{{ message.role }}:</strong>
        <template v-for="(part, idx) in message.parts" :key="idx">
          <div
            v-if="part.type === 'thinking'"
            class="text-sm text-gray-500 italic"
          >
            Thinking: {{ part.content }}
          </div>
          <span v-else-if="part.type === 'text'">{{ part.content }}</span>
        </template>
      </div>
    </div>
    <form @submit.prevent="handleSubmit">
      <input v-model="input" :disabled="isLoading.value" />
      <button type="submit" :disabled="isLoading.value">Send</button>
    </form>
  </div>
</template>

<script setup lang="ts">
import { useChat, fetchServerSentEvents } from "@tanstack/ai-vue";

const { messages, sendMessage, addToolApprovalResponse } = useChat({
  connection: fetchServerSentEvents("/api/chat"),
});
</script>

<template>
  <div>
    <template v-for="message in messages.value" :key="message.id">
      <template v-for="part in message.parts" :key="part.id">
        <div
          v-if="
            part.type === 'tool-call' &&
            part.state === 'approval-requested' &&
            part.approval
          "
        >
          <p>Approve: {{ part.name }}</p>
          <button
            @click="
              addToolApprovalResponse({
                id: part.approval!.id,
                approved: true,
              })
            "
          >
            Approve
          </button>
          <button
            @click="
              addToolApprovalResponse({
                id: part.approval!.id,
                approved: false,
              })
            "
          >
            Deny
          </button>
        </div>
      </template>
    </template>
  </div>
</template>

<script setup lang="ts">
import { ref } from "vue";
import { useChat, fetchServerSentEvents } from "@tanstack/ai-vue";
import {
  clientTools,
  createChatClientOptions,
  type InferChatMessages,
} from "@tanstack/ai-client";
import { updateUIDef, saveToStorageDef } from "./tool-definitions";

const notification = ref(null);

// Create client implementations
const updateUI = updateUIDef.client((input) => {
  // input is fully typed!
  notification.value = { message: input.message, type: input.type };
  return { success: true };
});

const saveToStorage = saveToStorageDef.client((input) => {
  localStorage.setItem(input.key, input.value);
  return { saved: true };
});

// Create typed tools array (no 'as const' needed!)
const tools = clientTools(updateUI, saveToStorage);

const { messages, sendMessage } = useChat({
  connection: fetchServerSentEvents("/api/chat"),
  tools, // Automatic execution, full type safety
});
</script>

<template>
  <div>
    <template v-for="message in messages.value" :key="message.id">
      <template v-for="(part, idx) in message.parts" :key="idx">
        <div v-if="part.type === 'tool-call' && part.name === 'updateUI'">
          Tool executed: {{ part.name }}
        </div>
      </template>
    </template>
  </div>
</template>

import { useGeneration } from "@tanstack/ai-vue";
import { fetchServerSentEvents } from "@tanstack/ai-client";

const { generate, result, isLoading, error, status, stop, reset } =
  useGeneration({
    connection: fetchServerSentEvents("/api/generate/custom"),
  });

import {
  clientTools,
  createChatClientOptions,
  type InferChatMessages,
} from "@tanstack/ai-client";

// Create typed tools array (no 'as const' needed!)
const tools = clientTools(tool1, tool2);

const chatOptions = createChatClientOptions({
  connection: fetchServerSentEvents("/api/chat"),
  tools,
});

type Messages = InferChatMessages<typeof chatOptions>;