How to determine if the input box cannot be spaces

This time I will bring you a method to determine that the input box cannot be a space. What are the precautions for the method to determine that the input box cannot be a space? The following is a practical case, let's take a look.

The example is as follows:

 var sno = $('#sno').val();
	var sname = $('#sname').val();
	if((sno.indexOf(" ") >= 0 || sno == null) || (sname.indexOf(" ") >= 0 || sname == null)){
		alert('学号和名称不能为空格或null值');
		return;
	}else{
	}

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other php Chinese websites related articles!

Recommended reading:

Set cookie expiration, automatic update and automatic acquisition

How to compress the files packaged by webpack Small

#Several ways to bind react events to this

The above is the detailed content of How to determine if the input box cannot be spaces. For more information, please follow other related articles on the PHP Chinese website!