Answers for "javascript add 2 spaces in string"

javascript replace two spaces with one

var multiSpacesString="I  have     some big    spaces.";
var singleSpacesString=multiSpacesString.replace(/  +/g, ' ');//"I have some big spaces."

js string insert space

document.getElementById('iban').addEventListener('input', function (e) {
  e.target.value = e.target.value.replace(/[^\dA-Z]/g, '').replace(/(.{4})/g, '$1 ').trim();
});