A radio button is an HTML input control representing one mutually exclusive choice within a group.
A radio button represents one choice in a mutually exclusive group. Its value identifies the choice; checked records whether it is selected. section 9.2.5
Controlled priority choices
Store the selected priority in state, give every input the same name, and derive checked from the current value: <input type="radio" name="importance" value={value} checked={value === current} onChange={onChange} />. Update state from evt.target.value. section 9.2.5
How React Quickly, Second Edition covers it
How deep it goes
Explains static values, checked state, shared names, and change updates, but stops short of deeper browser internals.
Examples
Demonstrates four priority choices and a reusable Radio component for an add-task form.
What it assumes
Assumes basic JSX and form handling while teaching radio-button state control through a concrete example.
What you can do after
Build it from scratch as a controlled React priority selector that stores the selected value in state.
How it connects
Connects radio buttons with controlled components, React state, HTML forms, checkboxes, and select boxes.
accent-colorconfigured by · The CSS accent-color property specifies the accent color used by supported user-interface controls and form elements.
Streamlitused by · Streamlit is an open-source Python framework for building interactive web applications, particularly for data and machine-learning applications.
configurationconfigured by · A specification of settings, parameters, or component relationships that determines how a system, application, model, or process is structured or operates.
checked propertyuses · The checked property is a form-control property that reports whether a checkbox input is selected.
form fieldkind of · A form field is a user-interface control or component that represents data to be entered or selected in a form, often with associated rendering or validation behavior.
widgetkind of · A widget is a self-contained user-interface component that displays information or provides a focused interaction.
This explainer was generated by Manning's knowledge graph from the text of React Quickly, Second Edition. The section links point to the parts of the book it draws on.
