如何使用javascript对字符串进行分块

function chunkString(str, blockSize) {
  var chunks = [];
  for (var i = 0; i < str.length; i += blockSize) {
    chunks.push(str.substring(i, i + blockSize));
  }
  return chunks;
}

var str = "This is a sample string.";
var blockSize = 5;
var result = chunkString(str, blockSize);
console.log(result);

function chunkString(str, blockSize) {
  var regex = new RegExp('.{1,' + blockSize + '}', 'g');
  return str.match(regex);
}

var str = "This is a sample string.";
var blockSize = 5;
var result = chunkString(str, blockSize);
console.log(result);

function chunkString(str, blockSize) {
  var chunks = [];
  for (var i = 0; i < str.length; i += blockSize) {
    chunks.push(str.slice(i, i + blockSize));
  }
  return chunks;
}

var str = "This is a sample string.";
var blockSize = 5;
var result = chunkString(str, blockSize);
console.log(result);