javascript - how to break up a string every X amount of characters?

Question

How do I break up a string every X amount of characters? For example, I'd like to break up a very long string every 1000 characters, and the string could be completely random everytime.

var string = <my text string that is thousands of characters long>

Answer 1

You could use Regex:

'asdfasdfasdfasdf'.match(/.{3}|.{1,2}/g); // 'asd', 'fas', etc.

Replace 3 with 1000 of course.

Here's a contrived example: http://jsfiddle.net/ReRPz/1/

---

As a function:

function splitInto(str, len) {
    var regex = new RegExp('.{' + len + '}|.{1,' + Number(len-1) + '}', 'g');
    return str.match(regex );
}

That RegExp really only needs to be created once if you have a set number to split like 1000.

Answer 2

Try this function:

function getParts(str, len)
{
    var res = [];
    ​while (str.length) {
        res.push(str.substring(0, len));
        str = str.substring(len);
    }
    return res;
}
var s = "qweasedzxcqweasdxzc12";
console.log(getParts(s, 10));

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