Question

我有一个问题。我有两个div：

<div class="cell" data-row-id="1" data-column-id="1"></div>     
<div class="cell" data-row-id="1" data-column-id="2"></div>

我必须修改 data-row-id = 1且 data-column-id = 2

的div的样式

有可能吗？谢谢！

Answer 1

您可以使用CSS

中的数据属性选择器执行此操作

[data-row-id="1"] {
    background-color: black;
}

Answer 2

以下是您的问题的JavaScript解决方案。

document.querySelector('div[data-row-id="1"][data-column-id="2"]').style.color = 'green'

<div class="cell" data-row-id="1" data-column-id="1">something 1</div>     
<div class="cell" data-row-id="1" data-column-id="2"> something 2</div>

以下是您的问题的CSS解决方案。

div[data-row-id="1"][data-column-id="2"] {
  color:green;
}

<div class="cell" data-row-id="1" data-column-id="1">something 1</div>     
<div class="cell" data-row-id="1" data-column-id="2"> something 2</div>

以下是解决问题的Jquery解决方案

$('div[data-row-id="1"][data-column-id="2"]').css('color', 'green');

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="cell" data-row-id="1" data-column-id="1">something 1</div>     
<div class="cell" data-row-id="1" data-column-id="2"> something 2</div>

Answer 3

您可以将data属性用作CSS选择器，例如：

0.001%

或使用Javascript：

function trackedProxy(name, val, _this){
    let handler = {} // place your property traps here
    let _privateObject = val
    let _privateProxy = new Proxy(_privateObject, handler)

    Object.defineProperty(_this, name, {
    get: function() {
      return _privateProxy;
    },
    set: function(value) {
        console.log("object changed")
        // Do something
        return _privateObject = value;
    }
  });
}

//build one with invocation of the function, but do not set as equal to a var or you will have the same issue. 
//**bad! - var a = trackedProxy('a',{keyOne: "one"},this)
trackedProxy('a',{ foo: "bar"}, this)

console.log(a)
//Proxy{ foo: "bar"}

a={keyOne: "one"}
//Object changed

console.log(a)
//Proxy{keyOne: "one"}

或使用jQuery：

.cell[data-column-id="2"] {
    background: tomato;
}
.cell[data-row-id="1"][data-column-id="2"] {
    background: green;
}

Answer 4

您可以使用css属性选择器定位属性 https://www.w3schools.com/cssref/sel_attribute_value.asp

public class AsyncEnumerator<T>
{
    private object _sync = new object();

    private readonly Queue<T> _queue;
    private readonly IEnumerable<T> _enumerable;

    public AsyncEnumerator(IEnumerable<T> enumerable)
    {
        _enumerable = enumerable;
        _queue = new Queue<T>();
    }

    /// <summary>
    /// Start getting results when requested the firstTime
    /// </summary>
    private bool _startFlag;

    public async Task<bool> MoveNextAsync()
    {
        if (_finished)
        {
            return false;
        }
        if (!_startFlag)
        {
            _startFlag = true;
            SetResultsAsync();
        }
        if (_queue.Count > 0)
        {
            Current = _queue.Dequeue();
            return true;
        }
        //What here?
        return await Task.Run(()=> true);
    }

    private T _current;
    public T Current
    {
        get
        {
            lock (_sync)
            {
                return _current;
            }
        }
        private set { _current = value; }
    }

    private bool _finished;

    private async Task SetResultsAsync()
    {
        IEnumerator<T> enumerator = _enumerable.GetEnumerator();
        bool moveNext = await Task.Run(() => enumerator.MoveNext());
        while (moveNext)
        {
            _queue.Enqueue(enumerator.Current);
            moveNext = await Task.Run(() => enumerator.MoveNext());
        }
        _finished = true;
    }
}

如何更改具有确定值属性的div的样式

4 个答案: