6 examples of 'an upper case and lower case string are equal.' in JavaScript

235
function _lowercase(string) {
236
    return string.split(' ').map(word => {
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        return _allUpperCase(word) ? word : word.toLowerCase();
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    }).join(' ');
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}

323
function hasSingleCase(string) {
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  return string === string.toLowerCase() || string === string.toUpperCase();
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}

30
function sameCase(value) {
31
	return $scope.filters.caseSensitive ? value : value.toUpperCase();
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}

10
function UPPER(string) {
11
  return string.toUpperCase();
12
}

12
export function toLower(string) {
13
  return string ? string.toLowerCase() : '';
14
}

41
function lower (str){
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  return str.toLowerCase();
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}