Category: React

  • react-router go back a page how do you configure history?

    When working with React and React Router, it is common to encounter situations where you need to programmatically navigate between pages or go back to the previous page. React Router provides a simple way to achieve this using the history object. The history object is a part of React Router and allows you to manipulate…

  • React Checkbox not sending onChange

    React Checkbox not sending onChange If you are working with React and have encountered the issue where the checkbox component is not sending the onChange event, you are not alone. This can be a frustrating problem, but luckily there are a few solutions that can help you resolve it. Solution 1: Binding the onChange event…

  • eslint: no-case-declaration – unexpected lexical declaration in case block

    eslint: no-case-declaration – unexpected lexical declaration in case block If you’ve encountered the eslint: no-case-declaration error while working with JavaScript, you’re not alone. This error occurs when a lexical declaration (such as let, const, or class) is found within a case block. This is considered bad practice because case blocks are meant to contain executable…

  • What’s the difference between useCallback and useMemo in practice?

    What’s the difference between useCallback and useMemo in practice? As a JavaScript developer, you may have come across the terms useCallback and useMemo while working with React. These two hooks are used to optimize performance by memoizing values and functions. While they may seem similar at first, there are some key differences between the two.…

  • React JS – Uncaught TypeError: this.props.data.map is not a function

    React JS – Uncaught TypeError: this.props.data.map is not a function If you are working with React JS and have encountered the error message “Uncaught TypeError: this.props.data.map is not a function”, don’t worry, you’re not alone. This error commonly occurs when you try to use the map() function on a variable that is not an array.…

  • How to toggle boolean state of a React component?

    How to toggle boolean state of a React component? React is a popular JavaScript library used for building user interfaces. One common task in React is toggling the state of a boolean variable. In this blog post, we will explore different ways to toggle the boolean state of a React component. Method 1: Using setState…

  • Why is the `MouseEvent` in the checkbox event handler not generic?

    When working with JavaScript, you may have come across the MouseEvent object while handling events on checkboxes. However, you might have noticed that the MouseEvent object is not generic in the checkbox event handler. In this blog post, we will explore why this is the case and discuss possible solutions to work around this limitation.…

  • How to define css variables in style attribute in React and TypeScript

    How to Define CSS Variables in Style Attribute in React and TypeScript When working with React and TypeScript, you might come across the need to define CSS variables in the style attribute. CSS variables, also known as custom properties, allow you to store and reuse values throughout your stylesheets. In this blog post, we’ll explore…

  • Understanding the React Hooks ‘exhaustive-deps’ lint rule

    Understanding the React Hooks ‘exhaustive-deps’ lint rule React Hooks have revolutionized the way we write components in React. They provide a simpler and more concise syntax for managing state and side effects. However, they also come with their own set of rules and best practices that developers need to be aware of. One such rule…

  • How to enable file upload on React’s Material UI simple input?

    How to Enable File Upload on React’s Material UI Simple Input? If you are working with React and using Material UI, you might have come across the need to enable file upload on a simple input component. While Material UI provides a variety of components, the simple input component does not have built-in support for…