How to push a class to a component

add class to component angular
hostbinding('class)
react components
add class in component
react router
react extends component
angular 4 add class dynamically
react hooks

I am using a component TextAreaField that has some default classes. I am wondering how can I push or add a new class to that component.

     <TextAreaField
          name="summary"
          label={{ id: 'Form.Summary' }}
          maxLength={200}
          rows={1}
          readOnly={readOnly}
        />

If I just add property className like this:

      <TextAreaField
          name="summary"
          label={{ id: 'Form.Summary' }}
          maxLength={200}
          rows={1}
          readOnly={readOnly}
          className="new-class"
        />

Then I overwrite the existing default classes, and I would only like to add a new one to it, how can I do that?

You could maintain the classes in an array like this:

let classes = ["class1", "class2"...];

Then you can add/remove class from using standard array methods like push/pop. Maintaining them as an array makes it easier to manage classes conditionally.

You can pass the final classes to your component by joining all the classes by a space like this:

<TextAreaField
          name="summary"
          label={{ id: 'Form.Summary' }}
          maxLength={200}
          rows={1}
          readOnly={readOnly}
          className={classes.join(" ")}
/>

Need a way for a component to add CSS classes to host non , In other situations, NgClass serves this purpose, but a component cannot apply a directive to its host element. Using the [class.whatever] syntax also doesn't  This article can be thought of as a dissection of a class and offers some guidelines that you should consider when designing classes. You'll examine a simple class and then take it apart piece by piece—using the cabbie example presented in an earlier column. Class components to discuss include: Class name—How the class name is identified

Instead of className use another property-name like classNames or classes and add that to the default classes.

React Router - How to pass History object to a component, There is a magical higher-order component, that name is withRouter. withRouter } from 'react-router-dom'; class PassToMeMyRouterHistory extends this.props; if(history) history.push('/home'); } render() { const { history }  this.chips.push(this.chip); this.chip = ''; Then the input's value becomes blank (as wanted), but the "is-dirty" CSS MDL class on the parent div is not removed. So what I want to do is to simply remove the class from DIV element in Component's template. How do I query DOM in Angular2 and manipulate it (add/remove CSS classes)?

Use the classnames library, which handles the class joining:

import React from 'react';
import classnames from 'classnames';

export default TextAreaField = ({ className }) => (
  <Textarea className={ classnames('myDefaultClassName', className) } />
)

React Components, Elements, and Instances – React Blog, For example, you may declare a Button component by creating a class. When the app is running, you may have several instances of this  As you have seen, props enable you to pass variables from one to another component down the component tree. In the previous example, it was only a string variable. But props can be anything from integers over objects to arrays. Even React components, but you will learn about this later. You can also define the props inline. In case of strings

I think you should use CSS modules in reactjs provided Follow this step https://medium.com/nulogy/how-to-use-css-modules-with-create-react-app-9e44bec2b5c2

Thinking in React – React, Separate your UI into components, where each component matches one piece of your data model. class ProductCategoryRow extends React. rows.push( Props are the means by which one component provides data to another or share data between components.Props is short for properties. React elements are technically objects which have properties attached with them. These properties contain data available to use in the component.

Core Java: An Integrated Approach: Covers Concepts, programs and , SW o JFC offers a rich set of components with lots of features . This package provides classes to create components like push buttons , check boxes , radio  Calling into a COM component •Create .NET assembly from COM component via tlbimp •Client apps may access the newly created assembly using System; using System.Runtime.InteropServices; using CONVERTERLib; class Convert {public static void Main(string [] args) {CFConvert conv = new CFConvert(); fahrenheit = conv.CelsiusToFahrenheit( celsius );

Best Practices for Component State in React.js, Component { // constructor () { this.state = { classes: [] }; } // BAD: push 'hover' into this.state.classes when mousing over the component  Yes there is a way to do it. First declare a class. //anyfile.ts export class Custom { name: string, empoloyeeID: number } Then in your component import the class

Deploying Components to Production, Click Deploy. In this tutorial, you learned how to create a custom object, how to add an Apex trigger, class, and test class  Typically, new React apps have a single App component at the very top. However, if you integrate React into an existing app, you might start bottom-up with a small component like Button and gradually work your way to the top of the view hierarchy. Extracting Components . Don’t be afraid to split components into smaller components.

Comments
  • What is TextAreaField? Is it from a library?
  • That depends on TextAreaField implementation, btw how about className="new-class old-class(es)" .
  • do you mean css class