dat_lines.splice(i-1, 1);
dat_lines.splice(i, 0, prev_line);
});
- add_button(td_btns, 'v', i+1 < dat_lines.length ? false : true, function() {
+ add_button(td_btns, 'v', (i && i+1 < dat_lines.length) ? false : true, function() {
const next_line = dat_lines[i];
dat_lines.splice(i, 1);
dat_lines.splice(i+1, 0, next_line);
});
td_btns.appendChild(document.createTextNode(' · · · '))
- add_button(td_btns, 'delete', false, function() { dat_lines.splice(i, 1); });
+ add_button(td_btns, 'delete', i > 0 ? false : true, function() { dat_lines.splice(i, 1); });
// add error explanation row if necessary
if (dat_line.error) {