I'm unsure about the JavaScript toolkit framework's handling of selecting HTML class attributes

I have been exploring the Electron Framework using a JavaScript toolkit known as Xel. In my main.js file, I am working with the following syntax:

document.querySelector("menu.selected").className.remove('selected')

In my Xel code snippet, I have a situation where selected is set as a pure HTML Class:

<x-tab selected class="menu">

I understand that it's not recommended to use something like this without specifying a Class="name". However, I am unsure how to access the current value of selected. When checking the console, I encountered the error message:

Uncaught TypeError: Cannot read property 'className' of null
javascripthtmlcsselectronjavascript-framework

Answer №1

It's not entirely clear what your goal is here, but I believe the code snippet below could be helpful to you. It demonstrates how to retrieve the 'checked' attribute based on a given className, which seems to align with your query...

Check out this JSBin

Link to JSBin: https://jsbin.com/kahona/edit?html,output


function validate() {
    var CurrentSelected = [];
    
    // Selecting checkbox elements
    var GetAllCheckBoxNodes = document.getElementsByClassName("someCheckBox");
    var InputNodesSize = GetAllCheckBoxNodes.length;
    for (var i = 0; i < InputNodesSize; i++) {
        var CurrentCheckBox = GetAllCheckBoxNodes[i];
        if (CurrentCheckBox.checked) {
            CurrentSelected.push(CurrentCheckBox.value);
        }
    }

    // Selecting radio button elements
    var GetAllRadioNodes = document.getElementsByClassName("someRadio");
    var GetAllRadioNodesLength = GetAllRadioNodes.length;
    for (var i = 0; i < GetAllRadioNodesLength; i++) {
        var CurrentRadioNode = GetAllRadioNodes[i];
        if (CurrentRadioNode.checked) {
            CurrentSelected.push(CurrentRadioNode.value);
        }
    }

    // Displaying selected items
    CurrentSelected.forEach(item => { console.log(item); });
}

Answer №2

The term selected in your scenario does not represent a typical "pure HTML Class." Instead, it serves as an attribute that is similar to selected="true" in the context of HTML5. If your intention is to locate this element using querySelector and remove the selected attribute using JavaScript, you can achieve it with the following code:

document.querySelector("menu[selected]").selected = false;

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