<div class="text_size">1234567</div>
<div class="text_size">7654321</div>
var size = 4,
newsContent= $('.text_size'),
newsText = newsContent.text();
if(newsText.length > size){
newsContent.text(newsText.slice(0, size) + ' ...');
}
const MAX = 3;
$('.text_size').text((i, text) => {
return text.length > MAX ? `${text.slice(0, MAX)}...` : text;
});
const reg = RegExp(`(.{${MAX}}).+`);
document.querySelectorAll('.text_size').forEach(n => {
n.innerText = n.innerText.replace(reg, '$1...');
});