uppercase javascript
var str = "Hello World!";
var res = str.toUpperCase(); //HELLO WORLD!
uppercase javascript
var str = "Hello World!";
var res = str.toUpperCase(); //HELLO WORLD!
javascript check if all capital letter
function isUpper(str) {
return !/[a-z]/.test(str) && /[A-Z]/.test(str);
}
isUpper("FOO"); //true
isUpper("bar"); //false
isUpper("123"); //false
isUpper("123a"); //false
isUpper("123A"); //true
isUpper("A123"); //true
isUpper(""); //false
how to check string uppercase or lowersace using regex javascript
var regex = /^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[!#\*\?])(?=.{8,})/;
js to uppercase
var string = "A string";
console.log(string.toUpperCase()); // -> A STRING
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