string parameters in angular/javascript

Question

This is going to be dumb, but I can't figure this out, nor find the answer

scope.newNote = "";
scope.addNote = function(note) {
    console.log(note);
    if (!note || note === '' || note.trim().length === 0) {
        return;
    }
}

HTML

<wysiwyg textarea-class="form-control" textarea-required ng-model="newNote" enable-bootstrap-title="true"></wysiwyg>

<button class="btn btn-default right" ng-click="addNote(newNote); newNote = null;">Add</button>

When I enter a bunch of spaces, this prints "'&''n''b''s''p'';''&''n''b''s''p'';'"

Hence, the note.trim().length is equal to 12

How do I check for strings that are just spaces?

Thanks

Paste the relevant html here, btw your tag should have ng-click="addNote()" and not on-click — Sudhir N
– Sudhir N, Commented Jan 1, 2015 at 13:05
share your complete controller. shouldn't it be '$scope' instead of 'scope'? — Md Ashaduzzaman
– Md Ashaduzzaman, Commented Jan 1, 2015 at 13:10

anonymous · Accepted Answer · 2015-01-01 13:25:41Z

1

Your question is:

How do I check for strings that are just spaces?

The answer is that you need is a simple regular expression like this:

if (/^\s*$/.test(note)) {
  // stuff
}

Explanation

^ -> beginning of string. With this symbol we say: we want to start the matching from the start.

\s -> match whitespace characters

* -> match 0 or more of the previous characters (In this example it is the \s) . Thanks to the fact that we can match 0 characters the empty string case ( "" ) is covered.

$ -> end of string. Match the end of string with the expression. Together with the ^ we say: match the whole string, not just a part of it.

edited Jan 1, 2015 at 13:25

answered Jan 1, 2015 at 13:10

anonymous

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