call parent window js function from iframe scrolling

When you call tComponentValue(new_value), that new value is sent to Streamlit, which then re-executes the Python script from top to bottom. St.write('result = ', result) # result = 3.14

Use tComponentValue() to return data from the component to the Python script:.Result = my_component(greeting='Hello', name='Streamlit') Arguments passed from the Python script are available via the dictionary:.M圜omponent.render() is called automatically when the component needs to be re-rendered (just like in any React app).The React-based template is in template/my_component/frontend/src/M圜omponent.tsx. If you'd rather not use React, please read this section anyway! It explains the fundamentals of You can learn the bits of React you need as you go. It handles most of the boilerplate required to send and receive data from Streamlit, and push_pin NoteĮven if you're not already familiar with React, you may still want to check out the React-based

We provide two templates to get started with in the Streamlit Components-template GitHub repo one of those templates uses React and the other does not. Frontendīecause each Streamlit Component is its own webpage that gets rendered into an iframe, you can use just about any web tech you'd like to create that web page. Each time the button is clicked, the JavaScript front-end increments the counter value and passes it back to Python ( JavaScript → Python), which is then displayed by Streamlit ( Python → JavaScript). The Streamlit Component displays a button ( Python → JavaScript), and the end-user can click the button. The example app from the template shows how bi-directional communication is implemented. $ streamlit run my_component/_init_.py # run the exampleĪfter running the steps above, you should see a Streamlit app in your browser that looks like this: venv/bin/activate # or similar to activate the venv/conda environment where Streamlit is installed $ template-reactless/my_component/frontendįrom a separate terminal, run the Streamlit app (Python) that declares and uses the component: # React template $ npm run start # Start the Webpack dev server $ npm install # Initialize the project and install npm dependencies Initialize and build the component template frontend from the terminal: # React template To build a Streamlit Component, you need the following installed in your development environment:Ĭlone the component-template GitHub repo, then decide whether you want to use the React.js ( 'template') or plain TypeScript ( 'template-reactless') template. If True, show a scrollbar when the content is larger than the iframe.

Call parent window js function from iframe scrolling