Q771. What are the rules of JSX?
The below 3 rules needs to be followed while using JSX in a react application. 1. **Return a single root element**: If you are returning multiple elements from a componen...
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Q772. How do you reverse an array?
You can use the `reverse()` method to reverse the elements in an array. This method is useful to sort an array in descending order. Let's see the usage of `reverse()` met...
Q773. What is the reason behind multiple JSX tags to be wrapped?
Behind the scenes, JSX is transformed into plain javascript objects. It is not possible to return two or more objects from a function without wrapping into an array. This...
Q774. How do you find the min and max values in an array?
You can use `Math.min` and `Math.max` methods on array variables to find the minimum and maximum elements within an array. Let's create two functions to find the min and ...
Q775. How do you prevent mutating array variables?
The preexisting variables outside of the function scope including state, props and context leads to a mutation and they result in unpredictable bugs during the rendering ...
Q776. How do you find the min and max values without Math functions?
You can write functions which loop through an array comparing each value with the lowest value or highest value to find the min and max values. Let's create those functio...
Q777. What are capture phase events?
The `onClickCapture` React event is helpful to catch all the events of child elements irrespective of event propagation logic or even if the events propagation stopped. T...
Q778. What is an empty statement and purpose of it?
The empty statement is a semicolon (;) indicating that no statement will be executed, even if JavaScript syntax requires one. Since there is no action with an empty state...
Q779. How does React updates screen in an application?
React updates UI in three steps, 1. **Triggering or initiating a render:** The component is going to triggered for render in two ways. 1. **Initial render:** When the app...
Q780. How do you get the metadata of a module?
You can use the `import.meta` object which is a meta-property exposing context-specific meta data to a JavaScript module. It contains information about the current module...