Question

4

rated 0 times [ 11] [ 7] / answers: 1 / hits: 23853 / 12 Years ago, tue, november 13, 2012, 12:00:00

I know I can use the following to check if a string is empty in JavaScript:

 if(Message != '')

How would I check to see if a string 'Message' in this case - is empty and doesn't contain a number of spaces. eg:

 '    '

would I need to use regular expressions?

Only authorized users can answer the question. Please sign in first, or register a free account.

Total Points: 100

Total Questions: 105

Total Answers: 90

Location: Sweden

Member since Mon, May 8, 2023

1 Year ago

answered 12 Years ago raymondd · Accepted Answer

jQuery doesn't replace Javascript.
You can use:

if (Message.replace(/s/g, ).length > 0) {

    // Your Code

}

Having said that, if you really want jQuery version, try this:

if ($.trim(Message).length > 0) {

    // Your Code

}

Or, so long as you're only targeting IE9+ and modern browsers, you can use the built in trim function.

if (Message.trim().length > 0) {

    // Your Code

}