需求 'get-element-by-id' 變?yōu)?'getElementById'
let str = 'get-element-by-id';
function firstLetterToUpper(str) {
return str.charAt(0).toUpperCase() + str.substring(1, str.length)
}
//
function convertToCamel(str) {
let strArr = str.split('-');
return strArr.map((item, key) => {
if (!key) return item
return firstLetterToUpper(item)
}).join('')
}
let result = convertToCamel(str); // getElementById
