FAQ   React.js FAQ


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About the React.js FAQ category
0 627 December 30, 2017
Can we access state properties using bracket notation?
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2 7715 January 19, 2021
How can we access the individual elements or values of a prop which is an array or object?
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5 8096 September 29, 2021
What is an HTML-like JSX element?
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2 6781 May 2, 2020
Why sometimes import has {} and sometimes doesn't?
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4 9638 November 14, 2020
Is using a variable to set an attribute better practice than using object properties to set attributes?
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6 8139 October 11, 2020
What happens if I don't use this when referencing a method from inside a class?
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12 6111 January 27, 2022
When should I use logic inside of render vs logic inside of the class declaration?
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3 7363 November 21, 2020
What does JSON.stringify do?
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2 14314 April 30, 2021
Can I call multiple event handlers in response to a single event?
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17 27814 August 31, 2021
Is the ReactDOM render() method the same as the component render() method?
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0 7272 January 3, 2019
Should we always set defaultProps for every prop value?
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0 7272 January 29, 2019
What if the specified container already has contents when rendering to it?
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5 6136 April 23, 2021
Why can I use a ternary operator inside a JSX expression but not an if statement?
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12 9836 December 10, 2021
Are there any other HTML attributes that are reserved keywords in JavaScript that I wont be able to use in JSX?
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6 11801 July 21, 2021
Can we pass the entire state object to the child component?
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3 6837 October 17, 2020
Can we return multiple elements in the render function?
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9 11002 October 11, 2021
Why do I get errors when I pass the method with () to the attribute?
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5 3630 May 26, 2020
Why don't I need a ReactDOM.render() for each component?
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6 13252 November 22, 2020
What is the full lifecycle and methods of a component?
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2 2544 October 1, 2021
Why would we want to use variables to set a component's attributes?
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0 4909 March 23, 2019
Do controlled and uncontrolled just mean stateless and stateful?
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0 3922 February 28, 2019
Is there a way to work with the individual children of a component?
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7 7096 July 26, 2021
Can we pass multiple event handlers as props and choose a specific one to attach to a child component?
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0 9015 February 13, 2019
Is it only possible to update a sibling component through a parent?
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1 1782 June 18, 2021
Can we only create one component instance at a time?
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2 7099 May 2, 2020
Can I change a component's attribute values using a conditional statement in the render function?
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8 4992 April 24, 2021
Why don't we set the event listener attribute value to a function call?
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8 9327 December 1, 2021
When should I use an if statement, a ternary operator, or the && operator?
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0 8103 March 13, 2019
What would be the advantage of named exports over other exports?
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3 6450 April 20, 2021