在vue cli 創建的項目里面， 設置環境變量，報錯 not defined問題出現的環境背景及自己嘗試過哪些方法相關代碼// 請把代碼文本粘貼到下方（請勿用圖片代替代碼）\//.env 文件 VUE_APP_TITLE=測試標題 // public/index.html <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width,initial-scale=1.0"> <link rel="icon" href="<%= BASE_URL %>favicon.ico"> <title><%= VUE_APP_TITLE %></title> </head> <body> <noscript> <strong>We're sorry but vue-test-3 doesn't work properly without JavaScript enabled. Please enable it to continue.</strong> </noscript> <div id="app"></div> <!-- built files will be auto injected --> </body> </html>期望頁面title顯示"測試標題"，但是有報錯"ReferenceError: VUE_APP_TITLE is not defined"
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