Web Reference: Using String.prototype.replace with regex, as mentioned in the other answers, is certainly the best solution. But, just for fun, you can also remove all whitespaces from a text by using String.prototype.split and String.prototype.join: Description The trim() method removes whitespace from both sides of a string. The trim() method does not change the original string. Jul 12, 2025 · JavaScript string.replace () method is used to replace a substring. With Regular expressions pattern we can find all spaces (/\s/g) and globally replace all space occurrences with an empty string.
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