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How to remove all white-spaces globally from a string

Regex are a powerful tool when it comes to string manipulation. For instance this expression /\s+/g in combination with .replace() method works well. To note: the /g stands for globally. I find it very useful when working with urls.

let string = "ciao come stai oggi ?"

string.replace(/\s+/g, "-")

output will be: ciao-come-stai-oggi-?

For more advanced solutions, the following function converts a string into a slug:

// Slugify a string
function slugify(str)
    str = str.replace(/^\s+|\s+$/g, '');

    // Make the string lowercase
    str = str.toLowerCase();

    // Remove accents, swap ñ for n, etc
    var from = "ÁÄÂÀÃÅČÇĆĎÉĚËÈÊẼĔȆÍÌÎÏŇÑÓÖÒÔÕØŘŔŠŤÚŮÜÙÛÝŸŽáäâàãåčçćďéěëèêẽĕȇíìîïňñóöòôõøðřŕšťúůüùûýÿžþÞĐđßÆa·/_,:;";
    var to   = "AAAAAACCCDEEEEEEEEIIIINNOOOOOORRSTUUUUUYYZaaaaaacccdeeeeeeeeiiiinnooooooorrstuuuuuyyzbBDdBAa------";
    for (var i=0, l=from.length ; i<l ; i++) {
        str = str.replace(new RegExp(from.charAt(i), 'g'), to.charAt(i));

    // Remove invalid chars
    str = str.replace(/[^a-z0-9 -]/g, '') 
    // Collapse whitespace and replace by -
    .replace(/\s+/g, '-') 
    // Collapse dashes
    .replace(/-+/g, '-'); 

    return str.substring(1,40);

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