Q541. What are the advantages of minification?
Normally it is recommended to use minification for heavy traffic and intensive requirements of resources. It reduces file sizes with below benefits, 1. Decreases loading ...
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Q542. Can useState take a function as an initial value?
Yes, `useState` can take a function as an initial value, and this is a useful feature in React called **lazy initialization**. This function is also known as **initialize...
Q543. What are the differences between obfuscation and Encryption?
Below are the main differences between obfuscation and encryption, | Feature | Obfuscation | Encryption | | ------------------ | -----------------------------------------...
Q544. What types of values can `useState` hold?
The `useState` hook accepts different types of values. * Primitives: `number`, `string`, `boolean` * Arrays * Objects * Functions * `null` or `undefined` But you needs to...
Q545. What are the common tools used for minification?
There are many online/offline tools to minify the javascript files, 1. Google's Closure Compiler 2. UglifyJS2 3. jsmin 4. javascript-minifier.com/ 5. prettydiff.com
Q546. What happens if you call `useState` conditionally?
As per rules of React Hooks, hooks must be called unconditionally. For example, if you conditionally call it: ```js if (someCondition) { const [state, setState] = useStat...
Q547. How do you perform form validation using javascript?
JavaScript can be used to perform HTML form validation. For example, if the form field is empty, the function needs to notify, and return false, to prevent the form being...
Q548. Is useState Synchronous or Asynchronous?
The `useState` hook is synchronous, but state updates are asynchronous. When you call `useState()`, it runs synchronously and returns the state variable and setter functi...
Q549. How do you perform form validation without javascript?
You can perform HTML form validation automatically without using javascript. The validation enabled by applying the `required` attribute to prevent form submission when t...
Q550. Can you explain how useState works internally?
React’s hooks, including `useState`, rely on some internal machinery that keeps track of state **per component** and **per hook call** during rendering. Here's a simplifi...