javascript how to remove empty lines in string

Javascript method to delete empty lines in a string: combine regular expressions to delete, such as [replace(/(\n[\s\t]*\r*\n)/g, '\ n').replace(/^[\n\r\n\t]*|[\n\r\n\t]*$/g, '');...].

#The operating environment of this article: windows10 system, javascript 1.8.5, thinkpad t480 computer.

We can use regular expressions to achieve this. Let’s take a look at the specific implementation code:

String.prototype.removeBlankLines = function () {
    return this.replace(/(\n[\s\t]*\r*\n)/g, '\n').replace(/^[\n\r\n\t]*|[\n\r\n\t]*$/g, '')
}

Running results:

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