使用 let 在 Google 工作表脚本编辑器上声明变量

Question

Whe I try to initialize variable using let I get prompted by this error: Missing ; before statement.

How to declare variables using let on Google sheet Script editor?

Answer 1

let was added from ECMAScript 2015 (ES6). But, unfortunately, Google Apps Script doesn't support ES6 yet. So when let is used in the script editor, in the current stage, the error occurs.

A lot of users want for ES6 to be added to Google Apps Script, It's on the feature requests, however, no progress seems to have been made.
https://issuetracker.google.com/issues/36764074

Reference :

• ECMAScript
• let
• Basic JavaScript features

If I misunderstand your question, I'm sorry.

Updated at February 12, 2020

Finally, the V8 Runtime has already been added to Google Apps Script. By this, let can be used in Google Apps Script.

Please check the official document .