Javascript-html's textarea, how to remove the blanks when submitting?

HTML textarea, how to remove the end-to-end space when submitting?
The front-end JS and back-end PHP should all be able to remove it?
How do you do it?
It is necessary to note that only the first and last spaces of the entire textarea are removed, if there is a newline in the middle of the text, or there are spaces, regardless of it.

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HTML textarea, how to remove the end-to-end space when submitting?
The front-end JS and back-end PHP should all be able to remove it?
How do you do it?
It is necessary to note that only the first and last spaces of the entire textarea are removed, if there is a newline in the middle of the text, or there are spaces, regardless of it.

First of all, a lot of people upstairs said Trim ().

So, why do textarea have spaces?

Don't do this:

内容。

To do this:

内容

Using the String.Trim () method of the string

Trim ()

All can, in JS, everything is the object, the string is also, so you can use the string. Trim ()
Trim in PHP is a function that uses trim (string)

You can replace it with a regular. But with trim convenience

var re =/^s+|s+$/g;
var str = $ (' #textarea '). Val ();
var text = str.replace (re, ');

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