JavaScript method to remove symbols at the end of spliced ​​strings

Preface: In JS, sometimes it is necessary to splice strings, and the spliced ​​strings are separated by certain symbols. At the end of the spliced ​​string There will be one more delimiter. In this case, we can use the following methods to remove the delimiter at the end.

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Method 1: Use substring() and lastIndexOf()

Method 2: Use substring() and length Attribute

Method 3: Use regular expression

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