Javascript不会加载代码的特定部分

Question

我正在搞乱javascript，我注意到它不会加载特定的代码行。

这一个......

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "lib" : ["es2015.iterable.ts"],
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "sourceMap": true,
    "noEmitHelpers": true
  },
  "exclude": [
    "node_modules",
    "typings/main.d.ts",
    "typings/main"
  ],
  "filesGlob": [
    "./src/**/*.ts",
    "./test/**/*.ts",
    "!./node_modules/**/*.ts",
    "src/custom_typings.d.ts",
    "typings/browser.d.ts"
  ],
  "awesomeTypescriptLoaderOptions": {
    "resolveGlobs": true,
    "forkChecker": true
  },
  "compileOnSave": false,
  "buildOnSave": false,
  "atom": { "rewriteTsconfig": false }
}

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;
}

这个剪辑显示了它实际发生的情况。当我想要它只是使所有绿色，然后只改变1的颜色..我怎么能这样做？

Answer 1

Element.getElementsByTagName()按标记名称选择元素，而不是通过CSS样式查询。

您正在寻找Document.querySelectorAll()：

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