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@line/liff-mock
Advanced tools
LIFF Mock
LIFF Mock is a LIFF Plugin that make testing your LIFF app easy.
※ LIFF Plugin feature is available since LIFF SDK v2.19.0.
Usage
NPM
$ npm install @line/liff-mock
import liff from '@line/liff';
import { LiffMockPlugin } from '@line/liff-mock';
liff.use(new LiffMockPlugin());
liff.init({
liffId: 'liff-xxxx',
mock: true, // enable mock mode
});
if (!liff.isInClient()) liff.login();
const profile = await liff.getProfile();
// { displayName: 'Brown', userId: '123456789', statusMessage: 'hello' }
console.log(profile);
With Pluggable SDK
If you use LIFF Mock with Pluggable SDK mode, you have to install IsInClientModule before the installation of LiffMockPlugin because LIFF Mock depends on liff.isInClient API.
import liff from '@line/liff/core';
import IsInClientModule from '@line/liff/is-in-client';
import { LiffMockPlugin } from '@line/liff-mock';
liff.use(new IsInClientModule()); // <-- Please install IsInClientModule before LiffMockPlugin
liff.use(new LiffMockPlugin());
liff.init({
liffId: 'liff-xxxx',
mock: true, // enable mock mode
});
if (!liff.isInClient()) liff.login();
const profile = await liff.getProfile();
// { displayName: 'Brown', userId: '123456789', statusMessage: 'hello' }
console.log(profile);
CDN
https://unpkg.com/@line/liff-mock@1.0.4/dist/umd/liff-mock.js
<!-- in <head> tag -->
<script src="https://unpkg.com/@line/liff-mock@1.0.4/dist/umd/liff-mock.js"></script>
const liff = window.liff;
const liffMockPlugin = window.liffMock;
liff.use(new LiffMockPlugin());
liff.init({
liffId: 'liff-xxxx',
mock: true, // enable mock mode
});
if (!liff.isInClient()) liff.login();
const profile = await liff.getProfile();
// { displayName: 'Brown', userId: '123456789', statusMessage: 'hello' }
console.log(profile);
API
liff.$mock.set
Set mock data
type set = (
data: Partial<MockData> | ((prev: Partial<MockData>) => Partial<MockData>)
) => void;
const profile = await liff.getProfile();
// { displayName: 'Brown', userId: '123456789', statusMessage: 'hello' }
console.log(profile);
liff.$mock.set((p) => ({
...p,
getProfile: { displayName: 'Cony', userId: '1111111' },
}));
const profile = await liff.getProfile();
// { displayName: 'Cony', userId: '1111111' }
console.log(profile);
liff.$mock.clear
Restore default mock data
type clear: () => void;
// liff.$mock.set(...)
const profile = await liff.getProfile();
// { displayName: 'Cony', userId: '1111111' }
console.log(profile);
liff.$mock.clear();
const profile = await liff.getProfile();
// { displayName: 'Brown', userId: '123456789', statusMessage: 'hello' }
console.log(profile);
Example
See examples
Contribution
$ nvm use
$ npm ci
Keywords
FAQs
Make testing your LIFF app easy
The npm package @line/liff-mock receives a total of 5,157 weekly downloads. As such, @line/liff-mock popularity was classified as popular.
We found that @line/liff-mock demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 4 open source maintainers collaborating on the project.
Package last updated on 17 Nov 2025
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