js-wrench
Version:
JS函数库
22 lines (21 loc) • 643 B
JavaScript
/**
* @description 小写转换成大写
*
* @param {string} str 需要被转换的字符串
* @return {*} {string} 一个新的字符串, 转换为大写的字符串
* @example toUpperCase("abc") => "ABC"
*/
const toUpperCase = (str) => {
let _arr = str.split('');
let _ascii;
let _max = 'z'.charCodeAt(0);
let _min = 'a'.charCodeAt(0);
for (let i = 0; i < _arr.length; i++) {
_ascii = _arr[i].charCodeAt(0);
if (_max >= _ascii && _min <= _ascii) {
_arr[i] = String.fromCharCode(_ascii - 32);
}
}
return _arr.join('');
};
export default toUpperCase;