How to Disable Button Tutorial in React

React: How to disable button tutorial

Here's how you disable a button using React

When you need to disable a button using React, you can simply add the disabled prop to your <button> element:

function App() {
  return <button disabled={true}>Click me!</button>;
}

Knowing this, you can easily modify the code according to your requirements to disable the <button>.

React disable button after click

For example, you may want to disable a <button> after it has been clicked. You can do so by adding a state that controls the value of disabled prop. Let’s name the state disable and set its default value to false:

const [disable, setDisable] = React.useState(false);

After that, you need to use the disable state value as the value of disabled prop in the <button> element.

Finally, add an onClick prop to the <button> element that will set the disable state to true.

The full code is as shown below:

import React from "react";
function App() {
  const [disable, setDisable] = React.useState(false);

  return (
    <button disabled={disable} onClick={() => setDisable(true)}>
      Click me!
    </button>
  );
}

With the code above, your button will be disabled once it receives a click event.

React disable button for login form

In another example, you may have a login button that you want to disable as long as the email and password <input> is empty.

You can easily do so by checking controlling the value of both <input> elements using the state.

When the value of email or password state is empty, the disabled prop value must be true. You can do so by using the following code:

disabled={!email || !password}

The following code example shows how to do it:

import React, { useState } from "react";

function App() {
  const [email, setEmail] = useState("");
  const [password, setPassword] = useState("");

  const handleEmailChange = (event) => {
    setEmail(event.target.value);
  };

  const handlePasswordChange = (event) => {
    setPassword(event.target.value);
  };

  const handleSubmit = (event) => {
    event.preventDefault();
    alert(`Your state values: \n 
            email: ${email} \n 
            password: ${password} \n 
            You can replace this alert with your process`);
  };

  return (
    <form onSubmit={handleSubmit}>
      <div>
        <label>Email address</label>
        <input
          type="email"
          name="email"
          placeholder="Enter email"
          onChange={handleEmailChange}
          value={email}
        />
      </div>
      <div>
        <label>Password</label>
        <input
          type="password"
          name="password"
          placeholder="Enter password"
          onChange={handlePasswordChange}
          value={password}
        />
      </div>
      <button type="submit" disabled={!email || !password}>
        Login
      </button>
    </form>
  );
}

This way, your <button> element will be disabled as long as the value of email or password state is falsy

Conclusion

To conclude, you can disable a <button> element in React by setting the disabled prop to true.

Depending on the conditions required to disable the <button>, you can manipulate the disabled prop through various ways, such as by checking if the form values are empty or the <button> has been clicked by the user.

Original article source at: https://sebhastian.com/

#react #disable #button 

Dockerfile Linter (written in Node.js)

Dockerfile Linter (written in Node.js)

Description

A Dockerfile linter that you can use to quickly check if your Dockerfile follows the best practices for building efficient Docker images. The tool uses ShellCheck analysis tool to lint code in RUN instructions. Some of the rules were inspired by Hadolint and Dockerfile reference documentation.

Installation

The linter requires Node.js to run:

npm install --global dockerlinter

Application

CLI

The linter can be used directly from the CLI:

dockerfilelinter -f <path to Dockerfile>
dockerfilelinter -f <path to Dockerfile> -s bash #default sh
dockerfilelinter -f <path to Dockerfile> -s none #disable shellcheck
dockerfilelinter -f <path to Dockerfile> -i ER0012,ER0015 #coma separated list of ignored rules
dockerfilelinter -f <path to Dockerfile> -e #return error code 1 for any error
dockerfilelinter -f <path to Dockerfile> -e warning #return error code 1 for errors with level 'warning' or higher(available levels: info, warning, error)

Docker

Docker allows you to run the linter on any type of platform. To mount the file, use the -v parameter:

docker build . -t imagename
docker run -v /tmp/files/dockerfile:/dockerfilelinter/dockerfile imagename linter -f dockerfile

Inline ignores

You can ignore rules for a specific instruction block in the Dockerfile by commenting it. The ignore comment must be applied above the instruction as # linter ignore=EF0003. The exceptions are ED and EL rules. Example:

# linter ignore=EF0003,EF0004
FROM node

YAML file with ignores

You can create YAML file "your dockerfile name".linter.yaml with list of ignored rules for specific Dockerfile or for all in folder dockerfilelinter.yaml. If you put file in the same folder where linting dockerfile is it will be auto-detected, but you can also use flag -y/--yaml to specify a path. Example:

ignored:
 - ER0012
 - ER0015

Rules

The list of rules implemented.

• Rules with the E prefix come from dockerfilelinter. Implementation can be found in lib/lints.js.
• Rules with the SC prefix come from ShellCheck. You can find their description in the tool's Wiki. For a more detailed description, use the Pages search tool.

Legend

ED - Error Directives EI - Error Instructions ER - Error RUN EC - Error COPY EU - Error USER EF - Error FROM EW - Error WORKDIR EE - Error EXPORT EL - Error Lines EA - Error ADD EJ - Error JSON

Development

You can help us develop linter by suggesting new rules and reporting bugs.

Tests

To run unit tests, use the command below:

npm run test

Maintainer

Docker Linter was created and developed by Buddy, creators of delivery automation tools for web and software developers.

CI/CD

The linter was created to validate the Dockerfile syntax in Continuous Integration and Delivery processes and can be used in any CI/CE tool. Buddy natively supports the linter, allowing you to create a pipeline that will check the syntax, build the Docker image and push it to the registry in a few simple steps:

1. First, define when and for what refs (branchs / tags / pull requests) should the pipeline execute:

1. Next, add the Lint Dockerfile action and select the Dockerfile to validate:

1. Last, add the Docker build action that will build the image and push it to the registry.

1. You can extend the pipeline to automate other processes in your workflow. For example, automatically update the image on your K8s cluster and notify the QA team in case something goes wrong:

Download Details:

Author: buddy-works
Source code: https://github.com/buddy-works/dockerfile-linter

License: GPL-3.0 license
#docker #nodejs 

Learn Angular : Dynamically Disable/Enable Multi Select Dropdown Options

Learn Angular : Dynamically Disable/Enable Multi Select Dropdown Options

In this Angular tutorial, you’ll learn how to disable or enable multi select dropdown options. You’ll also learn how to group data selection inside multi select dropdown options.

Source code from this tutorial is on GitHub https://github.com/jay3dec/Ang-MultiSelect-Group

#angular #multiselect #ng-multiselect-dropdown #disable

Why You Should Disable GraphQL Introspection In Production

A public GraphQL API is one made primarily for consumption by developers _outside _ of your organization (like the Shopify or GitHub APIs). Whereas a private GraphQL API is one built to serve the client-side experiences for products built by developers _within _ your organization. The vast majority of us are building private GraphQL APIs .

#graphql #disable #introspection #production

How to Disable TextField In Flutter? | Flutter Tutorial | Flutter Agency

In this video, We will disable a Textfield using TextField widget in Flutter.

Related Article Link:- https://flutteragency.com/how-to-disable-textfield-in-flutter/

Please subscribe our channel : https://www.youtube.com/channel/UCQp3j50Q3tdkZVwYt-eEz9A

For more detail visit : https://FlutterAgency.com

https://www.youtube.com/watch?v=PPFeXnYwehc

#flutter #flutterdevelopment #disable #disabletextfield

Wheels Galore | Iain M. MacLeod | wheelsgalore.scot

https://www.wheelsgalore.scot/

#best #book #disable #mental-heath #wheeks-galore #wheelsgalore

Enable / Disable Automated Access Tier Change Rules in Azure Blob Storage-Daily .NET Tips

In this post, we will learn how to Enable / Disable Automated Access Tier Change Rules in Azure Blob Storage Azure Storage supports three different levels of storage tiers for Blob objects. They are Hot storage tier, Cool storage tier, and Archive storage tier. This enables cost-effective usages of blob data storage. With the different levels of storage tiers, you can choose what types of tier needs for your data. In the previous post, we have learned how we can Automatically update Access Tier in Azure Blob Storage

#azure #azure blob storage #.net #disable #enable #blob