How to disable button rendering in react

How to disable button rendering in react: 1. Open the corresponding js code file; 2. Find "const flags = true;" and change "true" "Change the value to "false" to disable the button.

The operating environment of this tutorial: Windows 10 system, react18.0.0 version, Dell G3 computer.

How to disable button rendering in react?

The disabled and enabled states of the button button in react

disabled is false and is the enabled state

//  启用状态
    const flags = true;
    <Button disabled={flags}/>

disabled is true and is the disabled state

//  禁用状态
    <Button disabled/>
//  禁用状态2 变量控制
    const flags = false;
    <Button disabled={flags}/>

---

Let’s expand and talk about React custom components--Button

This is the main js code

import React, { Component } from 'react'
import "./dist/index.css";
import PropTypes from "prop-types";
import classnames from "classnames";
class Button extends Component {
    constructor(props) {
        super(props);
        this.state = { }
    }
    handleClick = () => {
        if (!this.props.onClick) return;
        this.props.onClick();
    };
    render() { 
        //为了能让 Button 组件有多个样式选择，于是安装 classnames 插件来帮助切换类名来切换样式：
        const ClassName = classnames({  //根据父组件传进来的 size 来判断使用什么类名
            "btn": true,
            [`btn_${this.props.type}`]: true,
            [`btn_${this.props.size}`]: true,
            "btn_disabled": this.props.disabled,
            "btn_circle": this.props.circle,
        });
        return (
            <button
                className = {ClassName}
                onClick = {this.handleClick}
            >
                {this.props.children}
            </button>
         );
    }
}
//   组件的默认属性
Button.defaultProps = {
    children: "Button",
    type: "primary",
    size: "default",
    disabled: false,
    circle: false,
};
//   使用propTypes  进行组件属性的检查
Button.propTypes = {
    children: PropTypes.string,
    type: PropTypes.oneOf(["primary", "success", "warning", "danger", "info"]),
    size: PropTypes.oneOf(["default", "small", "large"]),
    disabled: PropTypes.bool,
    circle: PropTypes.bool,
};
 
export default Button;

This is the style code

@bG-0: #fff;
@bF-1: #c0c4cc;
@PRIMARY: #409eff;
@SUCCESS: #67c23a;
@DANGER: #f65c6c;
@WARNING: #e6a23c;
@INFO: #909399;
@FONTSIZE: 14px;
@radius: 4px;
@btnBorderRadius: 4px;
@btnBorder: 1px solid transparent;
@btnMargin: 0 8px 12px 0;
@btnFontSize: 14px;
@btnLargeFontSize: 16px;
@btnSmallFontSize: 12px;
@btnPadding: 4px 15px;
@btnLargePadding: 6.4px 15px;
@btnSmallPadding: 1px 7px;
@btnDisabledCol: #909399;
.btn {
    width: 60px;
    height: 30px;
    border-radius: @btnBorderRadius;
    border: @btnBorder;
    outline: none;
    appearance: none;
    text-align: center;
    margin: @btnMargin;
    cursor: pointer;
    justify-content: center;
    align-items: center;
    text-align: center;
    &_primary {
        background-color: @PRIMARY;
        color: @bG-0;
        &:hover {
            opacity: 0.8;
        }
    }
    &_success {
        background: @SUCCESS;
        color: @bG-0;
        &:hover {
            opacity: 0.8;
        }
    }
    &_danger {
        background: @DANGER;
        color: @bG-0;
        &:hover {
            opacity: 0.8;
        }
    }
    &_warning {
        background: @WARNING;
        color: @bG-0;
        &:hover {
            opacity: 0.8;
        }
    }
    &_info {
        background-color: @bG-0;
        color: black;
        border: 1px dashed #999;
        &:hover {
            opacity: 0.8;
        }
    }
    &_disabled {
        background-color: @bF-1;
        color: @btnDisabledCol;
        cursor: not-allowed;
        &:hover {
            opacity: 1;
        }
    }
    &_circle {
        padding: 0;
        font-size: 16px;
        text-align: center;
        width: 30px;
        height: 30px;
        overflow: hidden;
        border-radius: 50%;
        word-break: break-all;
    }
    &_large {
        font-size: @btnLargeFontSize;
    }
    &_default {
        font-size: @btnFontSize;
    }
    &_small {
        font-size: @btnSmallFontSize;
    }
}

Final quote example

import './App.css';
import Button from './component/Button/index'
function App() {
  const handleClick = () => {
    alert('我是组件');
  }
  return (
    <div className="App">
      <header className="App-header">
        <Button>查询</Button>
        <Button type = "success">成功</Button>
        <Button type = "warning">警告</Button>
        <Button type = "danger">失败</Button>
        <Button type = "info">灰色</Button>
        <Button onClick={ handleClick }>事件</Button>
        <Button size=&#39;default&#39;>small</Button>
        <Button size=&#39;small&#39;>small</Button>
        <Button size=&#39;large&#39;>small</Button>
        <Button disabled={true} >a</Button>
        <Button size=&#39;default&#39; circle={true} >a</Button>
        <Button size=&#39;small&#39; circle={true} >a</Button>
        <Button size=&#39;large&#39; circle={true} >a</Button>
      </header>
    </div>
  );
}
export default App;

Achievements

Leave a good impression on yourself, there are still many shortcomings, I hope everyone can make progress together

Recommended Study: "react video tutorial"

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