To create a login page with React.js using Ory Kratos, you can follow these steps: 1. Implement the HTML code for the login form in your application. Ory Kratos does not render this HTML, giving you flexibility and customizability in your user interface flows and designs. You will use the Login Flow JSON response to render the login form UI. You can find an example of this in the [Ory Kratos documentation](https://www.ory.sh/docs/kratos/self-service/flows/user-login). 2. Use the Ory SDK (

@ory/client

) to create a login flow and render the user interface. The

@ory/integrations

package can be used as a helper to filter the flow data and render only the

password

method form fields. Here is an example of how to do this:

javascript import {    Configuration,    FrontendApi,    LoginFlow,    UiNode,    UiNodeInputAttributes,   } from "@ory/client"   import {    filterNodesByGroups,    isUiNodeInputAttributes,   } from "@ory/integrations/ui"   import { useEffect, useState } from "react"   import { useSearchParams } from "react-router-dom"      const frontend = new FrontendApi(    new Configuration({    basePath: "<http://localhost:4000>", // Use your local Ory Tunnel URL    baseOptions: {    withCredentials: true, // we need to include cookies    },    }),   )      export const Login = () => {    const [flow, setFlow] = useState<LoginFlow>()    const [searchParams] = useSearchParams()       useEffect(() => {    // check if the login flow is for two factor authentication    const aal2 = searchParams.get("aal2")    // we can redirect the user back to the page they were on before login    const returnTo = searchParams.get("return_to")       frontend    .createBrowserLoginFlow({    returnTo: returnTo || "/", // redirect to the root path after login    // if the user has a session, refresh it    refresh: true,    // if the aal2 query parameter is set, we get the two factor login flow UI nodes    aal: aal2 ? "aal2" : "aal1",    })    .then(({ data: flow }) => {    // set the flow data    setFlow(flow)    })    .catch((err) => {    // Couldn't create login flow    // handle the error    })    }, [])       const mapUINode = (node: UiNode, key: number) => {    // other node types are also supported    // if (isUiNodeTextAttributes(node.attributes)) {    // if (isUiNodeImageAttributes(node.attributes)) {    // if (isUiNodeAnchorAttributes(node.attributes)) {    if (isUiNodeInputAttributes(node.attributes)) {

3. You can also use Ory Elements, a component library designed to make building login, registration, and account pages for Ory straightforward. The UI created with Ory Elements changes dynamically to adapt to your Ory Network configuration. You can find more information about this in the [Ory Kratos documentation](https://www.ory.sh/docs/kratos/bring-your-own-ui/custom-ui-ory-elements). Remember to replace

"<http://localhost:4000>"

with your local Ory Tunnel URL.

Based on the information provided in the extracts, here is an example of how you might create form components using the Ory SDK and React.js:

javascript if (isUiNodeInputAttributes(node.attributes)) {   const attrs = node.attributes as UiNodeInputAttributes   const nodeType = attrs.type    switch (nodeType) {     case "button":     case "submit":       return (         <button           type={attrs.type as "submit" | "reset" | "button" | undefined}           name={attrs.name}           value={attrs.value}           key={key}         />       )     default:       return (         <input           name={attrs.name}           type={attrs.type}           autoComplete={             attrs.autocomplete || attrs.name === "identifier"             ? "username"             : ""           }         />       )   } }

In this example, the

isUiNodeInputAttributes

function is used to check if the node attributes are of type

UiNodeInputAttributes

. If they are, it creates a new

attrs

constant and assigns the node attributes to it. It then checks the type of the node and creates a button or input element accordingly. Please note that this is a simplified example and you may need to add additional logic and styling to suit your needs. You can find more detailed examples and information in the [Ory Kratos documentation](https://www.ory.sh/docs/kratos/bring-your-own-ui/custom-ui-basic-integration).