DRY and Export Titles

rdm

I'm looking at the "title" examples on https://datatables.net/extensions/buttons/examples/html5/titleMessage.html. Suppose I want to apply the same title to both Excel and Print buttons. Following the example on the page, I developed this. While it works as intended, I notice that I'm repeating the same title in both extensions. While this is a very small example, suppose we scaled this up to many functions across many pages. That's a lot of extra typing. Is there a Data Tables way to apply the same title to all declared buttons? (In this case, excelHtml5 and print).

const date = new Date();
const dateStamp = moment(date).format("YYYY-MM-DD");

const enrollmentHistory = $("#EnrollmentHistory").DataTable({
    dom: "lBfiprt",
    buttons: [
        {
            extend:"excelHtml5",
            title:`${dateStamp} Schoolmaster FY20 Enrollment History`
        }, 
        {
            extend:"print",
            title:`${dateStamp} Schoolmaster FY20 Enrollment History`
        }]
});

allan

The shortest would be to save it to a variable:

var title = `${dateStamp} Schoolmaster FY20 Enrollment History`;

// ... then
        {
            extend:"excelHtml5",
            title: title
        },

The other option would be to use $.extend() (or Object.assign() if you prefer):

buttons: [
  $.extend( { extend: 'excelHtml5' }, common ),
  $.extend( { extend: 'print' }, common )
]

where common is just { title: ...}.

Allan

rdm

Now it looks obvious. Thanks.