transforming the use of getelementbyid into a plural form

Question

transforming the use of getelementbyid into a plural form

Can a getElementById function work in plural context? Or would I need a different function or maybe jQuery?

<script type="text/javascript>
    window.onload = function() 
    {
        var test = document.getElementById('test');
        if (test) 
        {
            test.className = 'unactive';
            test.firstChild.onclick = function() 
            {
                if(this.parentNode.className == 'unactive') {
                    this.parentNode.className = 'active';
                } 
                else 
                {
                    this.parentNode.className = 'unactive';
                }
            }
        }
    };
</script>

javascript jquery html css getelementbyid

Answer 1

Answer №1

Feel free to utilize this handy function:

document.selectByID = function(id){
    if(document.all)
        return document.all[id];
    var elements = [],
    all = document.getElementsByTagName('*');
    for(var i=0;i<all.length;i++)
        if(all[i].getAttribute('id')===id)
            elements.push(all);
    return elements;
}

By the way, as mentioned by @Pointy, the id attribute should be unique, whereas the class is used to categorize elements with common properties.

Answer 2

Feel free to utilize this handy function:

document.selectByID = function(id){
    if(document.all)
        return document.all[id];
    var elements = [],
    all = document.getElementsByTagName('*');
    for(var i=0;i<all.length;i++)
        if(all[i].getAttribute('id')===id)
            elements.push(all);
    return elements;
}

By the way, as mentioned by @Pointy, the id attribute should be unique, whereas the class is used to categorize elements with common properties.

Answer 3

Answer №2

Assuming your intention is to perform actions on multiple elements based on a list of IDs. (If you are looking to select multiple elements with the same ID, this is not recommended as IDs should be unique. In such cases, consider using classes instead.)

To achieve this in jQuery: you can use a comma-separated list of id selectors (e.g., $("#foo, #bar, #baz")) and implement your function as follows:

$("#foo, #bar, #baz").addClass("unactive")
.children(":first-child").click(function() {
    var $this = $(this);
    var $parent = $this.parent();
    $parent.toggleClass("active unactive");
});

If you prefer not to use jQuery: here's a simple function that takes a list of IDs and returns an array of nodes:

function getElementByIdList() {
    var results = [];
    for(var i=0; i<arguments.length; ++i) {
        results.push(document.getElementById(arguments[i]));
    }
    return results;
}

You can use this function in your current code like so:

var myNodeArray = getElementByIdList("foo", "bar", "baz");
for(var i=0; i<myNodeArray.length; ++i) {
    var node = myNodeArray[i];
    if(node) {
        // Your code logic goes here...
    }
}

Answer 4

Assuming your intention is to perform actions on multiple elements based on a list of IDs. (If you are looking to select multiple elements with the same ID, this is not recommended as IDs should be unique. In such cases, consider using classes instead.)

To achieve this in jQuery: you can use a comma-separated list of id selectors (e.g., $("#foo, #bar, #baz")) and implement your function as follows:

$("#foo, #bar, #baz").addClass("unactive")
.children(":first-child").click(function() {
    var $this = $(this);
    var $parent = $this.parent();
    $parent.toggleClass("active unactive");
});

If you prefer not to use jQuery: here's a simple function that takes a list of IDs and returns an array of nodes:

function getElementByIdList() {
    var results = [];
    for(var i=0; i<arguments.length; ++i) {
        results.push(document.getElementById(arguments[i]));
    }
    return results;
}

You can use this function in your current code like so:

var myNodeArray = getElementByIdList("foo", "bar", "baz");
for(var i=0; i<myNodeArray.length; ++i) {
    var node = myNodeArray[i];
    if(node) {
        // Your code logic goes here...
    }
}

transforming the use of getelementbyid into a plural form

Answer №1

Answer №2

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