How to use underscore.js to find if a String is blank?

Question

I am looking an equivalent of http://commons.apache.org/proper/commons-lang/apidocs/org/apache/commons/lang3/StringUtils.html#isBlank(java.lang.CharSequence) I found several 3rd party extensions, but is there one out of the box with underscore.js: http://underscorejs.org

Answer 1

function isBlank(str) {
  return !!(str||'').match(/^\s*$/);
}

isBlank(null);    // => true
isBlank('');      // => true
isBlank(' \t ');  // => true
isBlank(' foo '); // => false