# News: Articles for #LINE MINI App

Reminder: On March 1, 2021, "Replace (Backward compatibility mode)" will be removed from the permanent link redirection settings for LIFF app and LINE MINI App

Changes from the news for November 20, 2020

In the November 20, 2020 news, the day when it will not be possible to return to Replace (Backward compatibility mode) once Method for converting additional information in the LIFF URL is set to Concatenate was announced as January 11, 2021. However, the schedule was changed to January 19, 2021. For more information about the updated schedule, see Discontinuation schedule.

As announced on November 20, 2020, on March 1, 2021, Replace (Backward compatibility mode) in Method for converting additional information in the LIFF URL on the LINE Developers Console will no longer be available. After this change, all LIFF and LINE MINI App URLs will be opened with Concatenate.

How to process additional information in the LIFF URL

Switch the setting to Concatenate for LIFF apps and LINE MINI Apps that are currently set to Replace (Backward compatibility mode) by the discontinuation date.

Continuation of "Replace (Backward compatibility mode)"

After March 1, 2021, environments that don't support Concatenate, such as LINE v10.10.0 or lower and LIFF SDK v2.2.1 or lower, can continue to use Replace (Backward compatibility mode), but the normal operation of the LIFF app and LINE MINI App isn't guaranteed. We recommend migrating to Concatenate.

# Discontinuation schedule

Date Description
January 11, 2021
January 19, 2021
  • Deprecation of Replace (Backward compatibility mode)
  • Replace (Backward compatibility mode) will no longer be available when creating new LIFF apps and LINE MINI Apps.
  • Once you change the setting to Concatenate, you can't revert to Replace (Backward compatibility mode).
March 1, 2021 Replace (Backward compatibility mode) will be removed, so the setting will be switched to Concatenate in all LIFF apps and LINE MINI Apps.

# Transition from "Replace (Backward compatibility mode)" to "Concatenate"

If your existing LIFF app or LINE MINI App uses Replace (Backward compatibility mode), do these two things to move to Concatenate by the discontinuation date (February 28, 2021).

# Upgrade your LIFF SDK version to v2.3.0 or later

Versions earlier than v2.3.0 don't support Concatenate, so upgrade to v2.3.0 or later.

If you're already using v2.3.0 or later, you don't need to upgrade.

# Make endpoint URL and LIFF URL correspond to "Concatenate"

When the setting is switched to Concatenate, the path and query parameters (/2020campaign/?key=value) specified in Endpoint URL of the LINE Developers Console will be included in the secondary redirect destination. As a result, the same endpoint URLs and LIFF URLs that were used to set Replace (Backwards compatibility mode) may result in unintended redirects to unintended URLs.

Make Endpoint URL and LIFF URL to be compatible with Concatenate if necessary.

To learn about the difference between Replace (Backward compatibility mode) and Concatenate, see Create a secondary redirect URL in the LIFF documentation.

Verify that the LIFF app and LINE MINI App open correctly after changing the settings

Once you have migrated your existing LIFF app and LINE Mini App settings to Concatenate, verify that the app opens correctly with the new settings. If they don't open correctly, correct the LIFF SDK version, Endpoint URL, and LIFF URL to be compatible with Concatenate.

[Updated] On March 1, 2021, "Replace (Backward compatibility mode)" will be removed from the permanent link redirection settings for LIFF app and LINE MINI App

Added on January 18, 2021

The day when it will not be possible to return to Replace (Backward compatibility mode) once Method for converting additional information in the LIFF URL is set to Concatenate was announced as January 11, 2021. However, the schedule was changed to January 19, 2021. For more information about the updated schedule, see Discontinuation schedule.

On March 1, 2021, Replace (Backward compatibility mode) in Method for converting additional information in the LIFF URL on the LINE Developers Console will no longer be available. After this change, all LIFF and LINE MINI App URLs will be opened with Concatenate.

How to process additional information in the LIFF URL

Switch the setting to Concatenate for LIFF apps and LINE MINI Apps that are currently set to Replace (Backward compatibility mode) by the discontinuation date.

Continuation of "Replace (Backward compatibility mode)"

After March 1, 2021, environments that don't support Concatenate, such as LINE v10.10.0 or lower and LIFF SDK v2.2.1 or lower, can continue to use Replace (Backward compatibility mode), but the normal operation of the LIFF app and LINE MINI App isn't guaranteed. We recommend migrating to Concatenate.

# Discontinuation schedule (planned)

Date Description
January 11, 2021
January 19, 2021
  • Deprecation of Replace (Backward compatibility mode)
  • Replace (Backward compatibility mode) will no longer be available when creating new LIFF apps and LINE MINI Apps.
  • Once you change the setting to Concatenate, you can't revert to Replace (Backward compatibility mode).
March 1, 2021 Replace (Backward compatibility mode) will be removed, so the setting will be switched to Concatenate in all LIFF apps and LINE MINI Apps.

# Transition from "Replace (Backward compatibility mode)" to "Concatenate"

If your existing LIFF app or LINE MINI App uses Replace (Backward compatibility mode), do these two things to move to Concatenate by the discontinuation date (February 28, 2021).

# Upgrade your LIFF SDK version to v2.3.0 or later

Versions earlier than v2.3.0 don't support Concatenate, so upgrade to v2.3.0 or later.

If you're already using v2.3.0 or later, you don't need to upgrade.

# Make endpoint URL and LIFF URL correspond to "Concatenate"

When the setting is switched to Concatenate, the path and query parameters (/2020campaign/?key=value) specified in Endpoint URL of the LINE Developers Console will be included in the secondary redirect destination. As a result, the same endpoint URLs and LIFF URLs that were used to set Replace (Backwards compatibility mode) may result in unintended redirects to unintended URLs.

Make Endpoint URL and LIFF URL to be compatible with Concatenate if necessary.

To learn about the difference between Replace (Backward compatibility mode) and Concatenate, see Create a secondary redirect URL in the LIFF documentation.

Verify that the LIFF app and LINE MINI App open correctly after changing the settings

Once you have migrated your existing LIFF app and LINE Mini App settings to Concatenate, verify that the app opens correctly with the new settings. If they don't open correctly, correct the LIFF SDK version, Endpoint URL, and LIFF URL to be compatible with Concatenate.

Service message template tab of the LINE MINI App channel updated

The [Service message template] tab of the LINE MINI App channel has been updated.

You can select a template and add it to your LINE MINI App channel while viewing the preview of the service message.

Service message template

You can also enter a JSON object to see the preview or send a test message.

Send Test Message

For more information, see Sending service messages.

LINE MINI App docs and entry point of contact opened

LINE MINI App opened its documents and entry point of contact.

# What is LINE MINI App?

LINE MINI App is a web application that runs on LINE.

With LINE MINI App, users can use various services without having to install separate apps.

LINE MINI App provides even more features than the existing LINE Front-end Framework (LIFF) App, including the ability to send a message called a "service message" to a special talk room.

Service Message

For details, see Discover LINE MINI App.

# How to develop LINE MINI App

In order to develop a LINE MINI App and provide it to your users, you must create a LINE MINI App Channel in the LINE Developers Console.

Currently, only developers of services that have applied to Enroll in the LINE MINI App Development Program and have passed the pre-examination are allowed to create a LINE MINI App Channel.

Please take this opportunity to Enroll in the LINE MINI App Development Program.

# LINE MINI App Development Documents

Please see the below information necessary for LINE MINI App development.