How to display 5 more rows of a table on the click on a button using jQuery

Question

I pre-load a table with all of its rows. However, I only want to show only the top 10 rows that are within the tag and now every <

Answer 1

1. You can use the selector $("#internalActivities tr") which will select all 's, regardless of a or not

2. You need to save the current displayed index in a separate variable, or calculate the current index based on how many elements are selected (use the .length property)

3. Check the current count of elements displayed and show/hide the corresponding buttons.

Example

HTML

Javascript

for (var i=0;i<21;i++) {
    $('#internalActivities').append('my data');
}

var trs = $("#internalActivities tr");
var btnMore = $("#seeMoreRecords");
var btnLess = $("#seeLessRecords");
var trsLength = trs.length;
var currentIndex = 10;

trs.hide();
trs.slice(0, 10).show(); 
checkButton();

btnMore.click(function (e) { 
    e.preventDefault();
    $("#internalActivities tr").slice(currentIndex, currentIndex + 10).show();
    currentIndex += 10;
    checkButton();
});

btnLess.click(function (e) { 
    e.preventDefault();
    $("#internalActivities tr").slice(currentIndex - 10, currentIndex).hide();          
    currentIndex -= 10;
    checkButton();
});

function checkButton() {
    var currentLength = $("#internalActivities tr:visible").length;

    if (currentLength >= trsLength) {
        btnMore.hide();            
    } else {
        btnMore.show();   
    }

    if (trsLength > 10 && currentLength > 10) {
        btnLess.show();
    } else {
        btnLess.hide();
    }

}

I created a jsFiddle demo to see this in action.