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javascript/snippets/is-upper-case.md

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+---
+title: String is uppercase
+type: snippet
+tags: [string]
+cover: flower-portrait-7
+dateModified: 2020-09-15T16:28:04+03:00
+---
+
+Checks if a string is upper case.
+
+- Convert the given string to upper case, using `String.prototype.toUpperCase()` and compare it to the original.
+
+```js
+const isUpperCase = str => str === str.toUpperCase();
+```
+
+```js
+isUpperCase('ABC'); // true
+isUpperCase('A3@$'); // true
+isUpperCase('aB4'); // false
+```