Limit Characters using Wix Code in a Repeater

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1

Hello, I have tried to do the same as the video https://www.youtube.com/watch?v=bprVct9I8uw to limit characters on my Wix repeater but I don’t understand why it is not working.

$w.onReady(() => {
    $w("#DatasetMarques").onReady(() => {

        $w("#Repeater1").onItemReady(($item, itemData, index) => {
            let theItem = itemData.descriptionCourte;
            var description = theItem.substr(0,55);
            $item("#Text14").text = description + " . . . ";
        });

    });

});

I don’t understand because the name of the dataset is good (“#DatasetMarques”), the repeater is called (“#Repeater1”), and the text I want to limit is called ‘‘descriptionCourte’’ in the database and the text on the repeater is “#Text14”. I am stuck, does someone has a solution ?

Thank You

2

When I execute the code, this is what I have :

Error: undefined is not an object (evaluating 'theItem.substr')