express.ui.input_action_link

express.ui.input_action_link(id, label, *, icon=None, **kwargs)

Creates a link whose value is initially zero, and increments by one each time it is pressed.

Parameters

id : str

An input id.

label : TagChild

An input label.

icon : TagChild = None

An icon to appear inline with the button/link.

****kwargs** : TagAttrValue = {}

Attributes to be applied to the link.

Returns

: Tag

A UI element

Notes

Server value

An integer representing the number of clicks.

See Also

• update_action_link
• input_action_button
• event

Examples

#| standalone: true
#| components: [editor, viewer]
#| layout: vertical
#| viewerHeight: 400

## file: app.py
import matplotlib.pyplot as plt
import numpy as np

from shiny import reactive
from shiny.express import input, render, ui

ui.input_slider("n", "Number of observations", min=0, max=1000, value=500)
ui.input_action_link("go", "Go!")


@render.plot(alt="A histogram")
# reactive.event() to invalidate the plot when the button is pressed but not when
# the slider is changed
@reactive.event(input.go, ignore_none=False)
def plot():
    np.random.seed(19680801)
    x = 100 + 15 * np.random.randn(input.n())
    fig, ax = plt.subplots()
    ax.hist(x, bins=30, density=True)
    return fig