CODEWITHSUNDEEP
javascriptjquerystring-concatenation
lepr88
lepr88

Reputation: 11

Issue with "+" character on var

I have a problem with the character "+" inside a string passed to jQuery object $()

I tried to initialize String object and concat but the problem remains the same.

function fn(string){
    $(string).show();
}

let myString = ".my-class-that-contains+";
fn(myString);

The code doesn't response as expected. When i remove the character "+" from the end of the string all works fine.

Upvotes: 0

Views: 77

Answers (2)

Jeet Kumar
Jeet Kumar

Reputation: 547

you can use like selector for it.

  function fn(string){
    // $(string).show();

    $('[class="'+string+'"]').show();
    }

    let myString = ".my-class-that-contains+";
    fn(myString);

For reference: https://api.jquery.com/attribute-starts-with-selector/

Upvotes: 0

Quentin
Quentin

Reputation: 943142

+ has a defined meaning in a selector. It is a sibling combinator.

To use it in a class name in a class selector, you need to escape it (with a \).

Remember that the CSS escape character is also the JavaScript escape character so you have to escape the \ characters in the selector to put them in the JavaScript string literal.

function fn(string){
    $(string).show();
}

let myString = ".my-class-that-contains\\+";
fn(myString);
div { display: none; }
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<div class="my-class-that-contains+">
This is hidden by default
</div>

It is best to avoid using special characters in class names in the first place.

Upvotes: 1

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