Javascript 不会加载代码的特定部分

Question

我正在摆弄 javascript，我注意到它不会加载特定的代码行..

这一个...

function RoomClick(str, ID) {

    RoomSelected();
    _getRoomName = ID;

    document.getElementById(_getRoomName).className = "RoomStyleSelected"; 
}

 function RoomSelected() {
    var divEls = document.getElementsByTagName("#Kati1 a")
    var i = 0;
    for (i = 0; i < divEls.length; i++) {
        //alert(divEls[i].id);
        _getRoomName = divEls[i].id;
        document.getElementById(_getRoomName).className = "RoomStyle"; //part where it doesnt load.
    }
}

   function RoomClick(str, ID) {

            RoomSelected();
            _getRoomName = ID;
        
            document.getElementById(_getRoomName).className = "RoomStyleSelected"; 
        }

 
        function RoomSelected() {

            var divEls = document.getElementsByTagName("#Kati1 a")
            var i = 0;
            for (i = 0; i < divEls.length; i++) {
                //alert(divEls[i].id);
                _getRoomName = divEls[i].id;
                document.getElementById(_getRoomName).className = "RoomStyle";
            }
        }

.RoomStyle {
    position: relative;
    width: 50px;
    height: 30px;
    float: left;
    margin: 10px;
    background-color: green;
    border-radius: 5px;
    font-family: 'Segoe UI';
    font-size: 20px;
    color: white;
    cursor: pointer;
    text-align: center;
}

.RoomStyleSelected {
    position: relative;
    width: 50px;
    height: 30px;
    float: left;
    margin: 10px;
    background-color: #00ff90;
    border-radius: 5px;
    font-family: 'Segoe UI';
    font-size: 20px;
    color: white;
    cursor: pointer;
    text-align: center;
}


#Kati1 {
    position: relative;
    top: 100px;
    left: 20px;
    width: 350px;
    height: 250px;
    border: solid 2px #00ff90;
  
    border-radius: 10px;
}

          <div id="Kati1">
          

            <a id="101" class=" RoomStyle" onclick="RoomClick(1,101)">101</a>
            <a id="102" class=" RoomStyle" onclick="RoomClick(1,102)">102</a>
            <a id="103" class=" RoomStyle" onclick="RoomClick(1,103)">103</a>
            <a id="104" class=" RoomStyle" onclick="RoomClick(1,104)">104</a>
            <a id="105" class=" RoomStyle" onclick="RoomClick(1,105)">105</a>
         
            <a id="201" class=" RoomStyle" onclick="RoomClick(1,201)">201</a>
            <a id="202" class=" RoomStyle" onclick="RoomClick(1,202)">202</a>
            <a id="203" class=" RoomStyle" onclick="RoomClick(1,203)">203</a>
            <a id="204" class=" RoomStyle" onclick="RoomClick(1,204)">204</a>
            <a id="205" class=" RoomStyle" onclick="RoomClick(1,205)">205</a>
         
            <a id="301" class=" RoomStyle" onclick="RoomClick(1,301)">301</a>
            <a id="302" class=" RoomStyle" onclick="RoomClick(1,302)">302</a>
            <a id="303" class=" RoomStyle" onclick="RoomClick(1,303)">303</a>
            <a id="304" class=" RoomStyle" onclick="RoomClick(1,304)">304</a>
            <a id="305" class=" RoomStyle" onclick="RoomClick(1,305)">305</a>
</div>

这个片段显示了实际发生的情况。当我想让它只变成绿色然后只改变 1 的颜色时..我该怎么做？

Answer 1

Element.getElementsByTagName()按标签名称选择元素，而不是按 CSS 样式查询。

---

您正在寻找Document.querySelectorAll()相反:

var divEls = document.querySelectorAll("#Kati1 a")