Zwraca wartość wywołującego łańcucha znaków, skonwertowaną na duże litery.
str.toUpperCase()Metoda toUpperCase() zwraca wartość łańcucha znaków skonwertowanego na duże litery. toUpperCase() nie wpływa na wartość samego łańcucha.
toUpperCase()console.log('alfabet'.toUpperCase()); // 'ALFABET'
StringString.fromCharCode()String.fromCodePoint() [Translate]String.prototype.anchor()String.prototype.big()String.prototype.blink()String.prototype.bold()String.prototype.charAt()String.prototype.charCodeAt()String.prototype.codePointAt() [Translate]String.prototype.concat()String.prototype.endsWith() [Translate]String.prototype.fixed()String.prototype.fontcolor()String.prototype.fontsize()String.prototype.includes() [Translate]String.prototype.indexOf() [Translate]String.prototype.italics()String.prototype.lastIndexOf() [Translate]String.prototype.link()String.prototype.localeCompare() [Translate]String.prototype.match() [Translate]String.prototype.normalize() [Translate]String.prototype.quote() [Translate]String.prototype.repeat() [Translate]String.prototype.replace() [Translate]String.prototype.search()String.prototype.slice()String.prototype.small()String.prototype.split() [Translate]String.prototype.startsWith() [Translate]String.prototype.strike()String.prototype.sub()String.prototype.substr()String.prototype.substring()String.prototype.sup()String.prototype.toLocaleLowerCase() [Translate]String.prototype.toLocaleUpperCase() [Translate]String.prototype.toLowerCase()String.prototype.toSource()String.protype.toString()String.prototype.toUpperCase()String.prototype.trim() [Translate]String.prototype.trimLeft() [Translate]String.prototype.trimRight() [Translate]String.prototype.valueOf()String.prototype[@@iterator]() [Translate]String.raw() [Translate]FunctionObjectObject.prototype.__defineGetter__() [Translate]Object.prototype.__defineSetter__() [Translate]Object.prototype.__lookupGetter__() [Translate]Object.prototype.__lookupSetter__() [Translate]Object.prototype.hasOwnProperty() [Translate]Object.prototype.isPrototypeOf() [Translate]Object.prototype.propertyIsEnumerable() [Translate]Object.prototype.toLocaleString()Object.prototype.toSource()Object.prototype.toString()Object.prototype.unwatch()Object.prototype.valueOf()Object.prototype.watch()