FAQ   React.js FAQ


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About the React.js FAQ category
0 560 December 30, 2017
Can we access state properties using bracket notation?
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2 7061 January 19, 2021
What is an HTML-like JSX element?
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2 6210 May 2, 2020
How can we access the individual elements or values of a prop which is an array or object?
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5 7253 September 29, 2021
Why sometimes import has {} and sometimes doesn't?
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4 8807 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 7483 October 11, 2020
What happens if I don't use this when referencing a method from inside a class?
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11 5621 August 31, 2021
Can I call multiple event handlers in response to a single event?
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17 25737 August 31, 2021
Is the ReactDOM render() method the same as the component render() method?
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0 6720 January 3, 2019
What does JSON.stringify do?
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2 12804 April 30, 2021
When should I use logic inside of render vs logic inside of the class declaration?
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3 6730 November 21, 2020
Can we return multiple elements in the render function?
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9 9682 October 11, 2021
What if the specified container already has contents when rendering to it?
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5 5672 April 23, 2021
Can we pass the entire state object to the child component?
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3 6239 October 17, 2020
Why can I use a ternary operator inside a JSX expression but not an if statement?
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10 8805 April 16, 2021
Should we always set defaultProps for every prop value?
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0 6617 January 29, 2019
Why do I get errors when I pass the method with () to the attribute?
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5 3419 May 26, 2020
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 10767 July 21, 2021
Why don't I need a ReactDOM.render() for each component?
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6 12234 November 22, 2020
Do controlled and uncontrolled just mean stateless and stateful?
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0 3589 February 28, 2019
What is the full lifecycle and methods of a component?
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2 2035 October 1, 2021
Why don't we set the event listener attribute value to a function call?
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7 8601 September 25, 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 8311 February 13, 2019
Is there a way to work with the individual children of a component?
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7 6428 July 26, 2021
Can we only create one component instance at a time?
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2 6567 May 2, 2020
Can I change a component's attribute values using a conditional statement in the render function?
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8 4604 April 24, 2021
Can props only be passed down the component tree?
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8 6609 June 22, 2021
When should I use an if statement, a ternary operator, or the && operator?
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0 7562 March 13, 2019
What would be the advantage of named exports over other exports?
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3 5946 April 20, 2021
Why would we want to use variables to set a component's attributes?
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0 4528 March 23, 2019