Is it possible to utilize the $ symbol within the ngOnInit or constructor functions?

I recently encountered an issue while trying to use the dollar sign ($) in my constructor function, specifically within ngOnInit() and translate.instant. Here is a snippet of the code that caused the problem:

declare var $: any;
{
    var SelectedDevice = $("#select2-example-basic".val();
}

When I attempted to run this code, I received the following error message.

I'm perplexed as to why I am experiencing difficulty using $ within constructors like ngOnInit and translate.instant, when it seems to work fine in other functions such as:

onClick(){
    var infoDataTable = $('#basic-table').DataTable().page.info();
}

In this case, no errors are present.

Below is a snippet of my HTML code for reference:

    <div class="table-responsive">
        <table id="basic-table" class="data-table table table-striped nowrap table-hover" cellspacing="0" width="100%">
            // Table content goes here
        </table>
    </div>
</div>

I would greatly appreciate some guidance on how I can use the dollar sign ($) without any issues. Thank you in advance for your assistance.

When attempting to install @types/jquery using npm, I encountered this error: view error message.

Answer №1

Replace declare var $: any;

Consider adding the type declaration files for jQuery:

npm install @types/jquery

Answer №2

If you want to add the jQuery library, use the command: npm install --save @types/jquery
It is recommended to use jQuery instead of $ in your code. For example:

jQuery("#select2-example-basic").val();

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