Question

我有一个从 A 到 Z 的按钮列表，当特定字母有任何品牌时，只有一些按钮会突出显示。当我点击一个特定的字母时，该按钮的文本颜色应该会改变。我尝试了下面的代码，但它删除了其他按钮和禁用按钮的突出显示颜色

constructor(props) {
    super(props)
    this.state = {
        selectedButton :  true
    }
}
getBrandSortData(){
    let btn_class = this.state.black ? "blackButton" : "whiteButton";
    return(
        <div className="BrandPageList_AlphabetContainer">
            <button value="all" className="BrandPageList_AllButton" onClick={this.handleClick}>All</button>
            {brandList.map((item,index) => 
            {
                let disbaled = !this.isBrandCharacterAvailable(item)
                return(
                    <button 
                    disabled= {disbaled}
                    value={item} 
                    key={index} 
                    block="BrandPageList_AlphabetButtons"
                    mods = {{enabled : !disbaled}}
                    onClick={this.handleClick}
                    className={btn_class}
                >
                {item}
                </button>
            )}
                
            )}
        </div>
    )
}
 handleClick = event =>{
    const brandValues = event.target.value
    if(brandValues === "all"){
        return this.setAllBrands()
    }
    else{
        let brandSortDataByCharacter = this.state.brandSortData[brandValues]
       this.setState({
           allBrands:
               {
                   [brandValues]: brandSortDataByCharacter,
                   selectedButton: !this.state.selectedButton
               },
       })
    }
}

我有以下 css 文件

 .blackButton{
    color: white;
  }
  
  .whiteButton{
    color: black;
  }

如何更改link中所示的文本颜色

Answer 1

您需要创建一个单独的按钮组件，以免每次将更改应用于子项时都重新渲染整个父项...

import { useState ) from 'react';

..

const Button = ({ clickCallback, initClass }) {
  const [ state, setState ] = useState(initClass);

  const toggleColor = () => {
    setState(state === 'whiteButton' ? 'blackButton' : 'whiteButton' );
  }

  const handleClick = () => {
    clickCallback(toggleColor);
  }

  render(
    <button className={ state } onClick={ handleClick } ></button>
  );
}

..

在父级

import Button from 'location'; // button component

..

// inside the parent component

const clickCallback = toggleColor => {
  this.state.activeButton && this.state.activeButton();
  this.state.activeButton = toggleColor;
}

..

// and in the render

<Button clickCallback={ clickCallback } initClass={ btn_class } />

当然这是一个缩小的例子，添加你需要的属性

单击按钮时如何更改文本颜色

1 个答案: