How to make my search field to filter the images by Tag name ,when in the input field the name beggins with "#" sign

I have a search input that filters the images by NAME , but now i want in the same input field when the word typed or the letter typed , begins with "#" sign the filter to be made by TAG name of the images But i need the "#" sign to now be taken into consideration , as my tag names do not begin with "#". Should it be made with RegEx , to be case sensitive , or there is simpler way ? Below is part of my code.

<div class="searchButton">
    <input type="text" id="inputValue" placeholder="Search by name or tag">
    <button onclick="goToPage(0,limit)" type="button">Search</button>
</div>

And my Javascript :

This is how my array of object looks like and the functions :

arrayPhotos= [{
        "location": "Photos/_DSC0150.jpg",
        "title": "Title001",
        "id": "image_id_001",
        "tag": [ "building", "city", "hotel"]
      },
      {
        "location": "Photos/_DSC0226.jpg",
        "title": "Title002",
        "id": "image_id_002",
        "tag": [ "fruit", "palm"]
      },
      {
        "location": "Photos/_DSC0442.jpg",
        "title": "Title003",
        "id": "image_id_003",
        "tag": [ "building" , "catedral" , "history"]
      }
    ]

    function goToPage(pageNum, count) {

    let filter = $("#inputValue").val().toLowerCase();
    let imgIndex = pageNum * count;
    goToItem(filter,imgIndex, count);

}

function goToItem(filter,imgIndex,count) {
     let imagesToDisplay =  getImageArray(filter, imgIndex, count); /// This is the function where the filtering is happening////
     const imgCount = getImagesCount();
     RenderPagingView(imgCount);
     renderImages(imagesToDisplay);
}


function getImageArray(filter, imgIndexStart, numberOfImages ) {
    let filteredArrayPhotos = [];
    let ofsCntr = 0;

    if ( numberOfImages <1 ) {
        numberOfImages = arrayPhotos.length;
    }

    if ( filter !== '') {

        const tmpFiltered = arrayPhotos.filter(image => image.title.toLowerCase().indexOf(filter) >= 0);
        for ( let arrayKey in tmpFiltered ) {
            const elem = tmpFiltered[arrayKey];
            if ( ofsCntr < imgIndexStart )
            {
                ofsCntr++;
                continue;
            }
            ofsCntr++;

            filteredArrayPhotos.push(elem);
            if ( filteredArrayPhotos.length >= numberOfImages )
                break;
        }
    }else {
        for (let arrayKey in arrayPhotos) {
            const elem = arrayPhotos[arrayKey];
            if (ofsCntr < imgIndexStart ){
                ofsCntr++;
                continue;
            }
            ofsCntr++;

            filteredArrayPhotos.push(elem);
            if ( filteredArrayPhotos.length >= numberOfImages ) break;
        }
    }
    return filteredArrayPhotos;
}