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javascript trim()

String.trim() is quite useful in many situations. Unfortunately not all browsers have this function on String prototype (e.g. IE8):

I see many people use jQuery.trim(), but isn’t it better to just use String.trim and provide a backup function if it is not implemented, like we did with Date.toISOString:

if(!String.prototype.trim) {
  String.prototype.trim = function() {
    return this.replace(/^\s+|\s+$/g, "");
  }
}

EDIT: found this solution on SO. Did we think the same?

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