関連ワード:  typescript check if string is not empty    typescript check if string is not empty or undefined    javascript check if string is not empty    javascript check if string is not empty or undefined    javascript check if string is not empty or whitespace    javascript check if string is not empty or undefined or whitespace    typescript check if string is not null    typescript check if string is not null or undefined    javascript check if string is not null    javascript check if string is not blank  
結果 : typescript check if string is not empty