FAQ   React.js FAQ


Topic Replies Views Activity
About the React.js FAQ category
0 766 December 30, 2017
Can we access state properties using bracket notation?
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2 8819 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 9310 September 29, 2021
What is an HTML-like JSX element?
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2 7640 May 2, 2020
Why sometimes import has {} and sometimes doesn't?
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4 10891 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 9054 October 11, 2020
Can I call multiple event handlers in response to a single event?
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17 30652 August 31, 2021
What happens if I don't use this when referencing a method from inside a class?
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13 6961 October 22, 2022
What does JSON.stringify do?
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4 18071 April 4, 2022
When should I use logic inside of render vs logic inside of the class declaration?
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3 8493 November 21, 2020
Is the ReactDOM render() method the same as the component render() method?
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0 7967 January 3, 2019
Why can I use a ternary operator inside a JSX expression but not an if statement?
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12 11642 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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7 14125 September 25, 2022
Can we return multiple elements in the render function?
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10 14518 February 10, 2022
What if the specified container already has contents when rendering to it?
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5 6997 April 23, 2021
Should we always set defaultProps for every prop value?
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0 8367 January 29, 2019
Why don't we set the event listener attribute value to a function call?
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9 10663 June 6, 2022
Why do I get errors when I pass the method with () to the attribute?
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6 3938 May 7, 2022
Why don't I need a ReactDOM.render() for each component?
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7 15457 March 16, 2022
What is the full lifecycle and methods of a component?
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4 3749 March 2, 2022
Can we pass the entire state object to the child component?
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4 8047 January 30, 2022
Can we pass multiple event handlers as props and choose a specific one to attach to a child component?
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1 10346 March 27, 2022
Can I inject other programming languages besides JavaScript into JSX?
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11 12451 December 17, 2021
Is it only possible to update a sibling component through a parent?
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1 2653 June 18, 2021
Can I change a component's attribute values using a conditional statement in the render function?
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8 5585 April 24, 2021
Is there a way to work with the individual children of a component?
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7 8231 July 26, 2021
Can we only create one component instance at a time?
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2 8139 May 2, 2020
Why would we want to use variables to set a component's attributes?
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0 5503 March 23, 2019
When should I use an if statement, a ternary operator, or the && operator?
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0 8975 March 13, 2019
When should I assign a variable to a JavaScript expression that I want to use in a JSX expression?
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0 8062 February 17, 2019