Class Logger
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Logger
Class ini memungkinkan developer menulis ke log Eksekusi dan ke Google Cloud Logging jika skrip dikaitkan dengan Project Cloud standar. Class ini lebih disukai untuk logging terstruktur dan dukungan jsonPayload di Cloud Logging. Untuk logging berbasis waktu, gunakan console.
Metode
| Metode | Jenis hasil yang ditampilkan | Deskripsi singkat |
clear() | void | Menghapus log. |
getLog() | String | Menampilkan daftar lengkap pesan dalam log saat ini. |
log(data) | Logger | Menulis data ke log. |
log(format, values) | Logger | Menulis string berformat ke konsol logging, menggunakan format dan nilai yang disediakan. |
Dokumentasi mendetail
getLog()
Menampilkan daftar lengkap pesan dalam log saat ini. Metode ini dapat digunakan untuk menyimpan atau
mengirim email seluruh output log yang dihasilkan selama eksekusi skrip.
// Generate a log, then email it to the person who ran the script.
const files = DriveApp.getFiles();
while (files.hasNext()) {
Logger.log(files.next().getName());
}
const recipient = Session.getActiveUser().getEmail();
const subject = 'A list of files in your Google Drive';
const body = Logger.getLog();
MailApp.sendEmail(recipient, subject, body);
Pulang pergi
String — log dari konsol logging
log(data)
Menulis data ke log. Data dapat berupa string, objek JavaScript, atau objek dengan
properti message.
Logger.log("my log message");
// Info my logmessage
Logger.log({ key: "value" });
// Info {key=value}
Logger.log({ message: "my log message", data: { key: "value" } })
// Info my logmessage
Saat meneruskan objek, jika objek berisi properti message, properti tersebut
akan digunakan sebagai pesan log. Jika tidak, metode toString() akan dipanggil untuk mengonversi
objek menjadi string. Semua properti lain yang dapat diserialisasi JSON disertakan sebagai bagian dari
jsonPayload di LogEntry, mirip dengan contoh di bawah:
{
"insertId": "w5eib...",
"jsonPayload": {
"message": "my log message",
"serviceContext": {
"service": "AKfyc..."
},
"data": {
"key": "value"
}
},
"resource": {
"type": "app_script_function",
"labels": {
"invocation_type": "editor",
"function_name": "unknown",
"project_id": "1234567890"
}
},
"timestamp": "2024-11-15T23:28:19.448591Z",
"severity": "INFO",
"labels": {
"script.googleapis.com/user_key": "AOX2d...",
"script.googleapis.com/process_id": "EAEA1...",
"script.googleapis.com/project_key": "MQXvl...",
"script.googleapis.com/deployment_id": "AKfyc..."
},
"logName": "projects/[PROJECT_ID]/logs/script.googleapis.com%2Fconsole_logs",
"receiveTimestamp": "2024-11-15T23:28:20.363790313Z"
}
Parameter
| Nama | Jenis | Deskripsi |
data | Object | objek yang akan dicatat ke dalam log |
Pulang pergi
Logger — Logger, untuk pembuatan rantai.
Menulis string berformat ke konsol logging, menggunakan format dan nilai yang disediakan. String
dapat menyertakan beberapa placeholder %s, yang diganti dengan nilai
yang sesuai dari daftar argumen, yang dikonversi menjadi string.
// Log the number of Google Groups you belong to.
const groups = GroupsApp.getGroups();
Logger.log('You are a member of %s Google Groups.', groups.length);
Parameter
| Nama | Jenis | Deskripsi |
format | String | string format yang berisi instance %s sebanyak jumlah argumen values |
values | Object... | jumlah nilai variabel yang akan disisipkan ke dalam string format |
Pulang pergi
Logger — Logger, untuk pembuatan rantai
Kecuali dinyatakan lain, konten di halaman ini dilisensikan berdasarkan Lisensi Creative Commons Attribution 4.0, sedangkan contoh kode dilisensikan berdasarkan Lisensi Apache 2.0. Untuk mengetahui informasi selengkapnya, lihat Kebijakan Situs Google Developers. Java adalah merek dagang terdaftar dari Oracle dan/atau afiliasinya.
Terakhir diperbarui pada 2025-07-26 UTC.
[null,null,["Terakhir diperbarui pada 2025-07-26 UTC."],[[["\u003cp\u003eThe \u003ccode\u003eLogger\u003c/code\u003e class enables developers to write text to debugging logs for script analysis and troubleshooting.\u003c/p\u003e\n"],["\u003cp\u003eIt provides methods to clear the log, retrieve the entire log as a string, and write formatted or unformatted messages to the log.\u003c/p\u003e\n"],["\u003cp\u003eLogged output can be viewed within the Apps Script editor using "View > Show logs" and utilized for debugging purposes.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003egetLog()\u003c/code\u003e method allows for capturing the log content, which can then be used for saving, emailing, or further processing.\u003c/p\u003e\n"],["\u003cp\u003eDevelopers can leverage format strings and values to create structured log messages using the \u003ccode\u003elog(format, values)\u003c/code\u003e method.\u003c/p\u003e\n"]]],[],null,["# Class Logger\n\nLogger\n\nThis class allows the developer to write to the Execution log and to [Google Cloud Logging](https://cloud.google.com/logging) if the script is associated with\na [standard\nCloud Project](https://developers.google.com/apps-script/guides/cloud-platform-projects#standard). This class is preferred for structured logging and `json``Payload` support\nin Cloud Logging. For time-based logging, use [console](/apps-script/reference/base/console). \n\n### Methods\n\n| Method | Return type | Brief description |\n|-----------------------------------------------|-------------|-----------------------------------------------------------------------------------------|\n| [clear()](#clear()) | `void` | Clears the log. |\n| [getLog()](#getLog()) | `String` | Returns a complete list of messages in the current log. |\n| [log(data)](#log(Object)) | [Logger](#) | Writes the data to the log. |\n| [log(format, values)](#log(String,Object...)) | [Logger](#) | Writes a formatted string to the logging console, using the format and values provided. |\n\nDetailed documentation\n----------------------\n\n### `clear()`\n\nClears the log.\n\n*** ** * ** ***\n\n### `get``Log()`\n\nReturns a complete list of messages in the current log. This method can be used to save or\nemail the entire log output generated during script execution.\n\n```javascript\n// Generate a log, then email it to the person who ran the script.\nconst files = DriveApp.getFiles();\nwhile (files.hasNext()) {\n Logger.log(files.next().getName());\n}\nconst recipient = Session.getActiveUser().getEmail();\nconst subject = 'A list of files in your Google Drive';\nconst body = Logger.getLog();\nMailApp.sendEmail(recipient, subject, body);\n```\n\n#### Return\n\n\n`String` --- the log from the logging console\n\n*** ** * ** ***\n\n### `log(data)`\n\nWrites the data to the log. The data can be a string, a JavaScript object, or an object with a\n`message` property.\n\n```javascript\nLogger.log(\"my log message\");\n// Info my logmessage\nLogger.log({ key: \"value\" });\n// Info {key=value}\nLogger.log({ message: \"my log message\", data: { key: \"value\" } })\n// Info my logmessage\n```\n\nWhen passing an object, if the object contains a `message` property, that property is\nused as the log message. Otherwise, the `to``String()` method is called to convert the\nobject to a string. All other properties which are JSON serializable are included as part of\nthe `json``Payload` in the [`Log``Entry`](https://cloud.google.com/logging/docs/reference/v2/rest/v2/LogEntry), similar to the example below:\n\n```transact-sql\n{\n \"insertId\": \"w5eib...\",\n \"jsonPayload\": {\n \"message\": \"my log message\",\n \"serviceContext\": {\n \"service\": \"AKfyc...\"\n },\n \"data\": {\n \"key\": \"value\"\n }\n },\n \"resource\": {\n \"type\": \"app_script_function\",\n \"labels\": {\n \"invocation_type\": \"editor\",\n \"function_name\": \"unknown\",\n \"project_id\": \"1234567890\"\n }\n },\n \"timestamp\": \"2024-11-15T23:28:19.448591Z\",\n \"severity\": \"INFO\",\n \"labels\": {\n \"script.googleapis.com/user_key\": \"AOX2d...\",\n \"script.googleapis.com/process_id\": \"EAEA1...\",\n \"script.googleapis.com/project_key\": \"MQXvl...\",\n \"script.googleapis.com/deployment_id\": \"AKfyc...\"\n },\n \"logName\": \"projects/[PROJECT_ID]/logs/script.googleapis.com%2Fconsole_logs\",\n \"receiveTimestamp\": \"2024-11-15T23:28:20.363790313Z\"\n}\n```\n\n#### Parameters\n\n| Name | Type | Description |\n|--------|----------|-------------------|\n| `data` | `Object` | the object to log |\n\n#### Return\n\n\n[Logger](#) --- the Logger, for chaining.\n\n*** ** * ** ***\n\n### `log(format, values)`\n\nWrites a formatted string to the logging console, using the format and values provided. The\nstring can include multiple `%s` placeholders, which are replaced with corresponding\nvalues from the list of arguments, converted to strings.\n\n```javascript\n// Log the number of Google Groups you belong to.\nconst groups = GroupsApp.getGroups();\nLogger.log('You are a member of %s Google Groups.', groups.length);\n```\n\n#### Parameters\n\n| Name | Type | Description |\n|----------|-------------|---------------------------------------------------------------------------------------------|\n| `format` | `String` | a format string that contains as many instances of `%s` as the number of `values` arguments |\n| `values` | `Object...` | a variable number of values to insert into the format string |\n\n#### Return\n\n\n[Logger](#) --- the Logger, for chaining"]]
