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js number format space

function numberWithSpaces(x) {
    return x.toString().replace(/B(?=(d{3})+(?!d))/g, " ");
  // 1650000 to 1 650 000
}

js number format space

function numberWithSpaces(x) {
    var parts = x.toString().split(".");
    parts[0] = parts[0].replace(/B(?=(d{3})+(?!d))/g, " ");
    return parts.join(".");
}