JQuery Check if Element Exists using this simple piece of code. To check this in the current page, we need to check the length of the element returned by the JQuery selector, if it returns you something then the element must exists otherwise no. if( $(‘#EleSelector’).length ) { // use this if you are using […]
For a check box with the id “checkbox”, here is how to check if its checked: $(‘#checkbox’).is(‘:checked’); // Returns True if checked else False
Here is the code to remove duplicates from an Array: var distinctVal = function(arr){ var newArray = []; for(var i=0, j=arr.length; i<j; i++){ if(newArray.indexOf(arr[i]) == -1) newArray.push(arr[i]); } return newArray; };
To check if a variable(a) has the value null, use the following code: if (a === null) // Best way to do it! if (a == null) // This does return true if a is null but it returns true also if a is undefined… so avoid it To check if a variable(a) has the […]
JavaScript has two sets of equality operators: === and ==. They mostly work exactly the same ie, if the operands are of the same type and have the same value, then === produces true & so does ==. But if the operands are of different types, then === produces false & == says true. The […]