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replace lodash and update props name
Signed-off-by: tygao <tygao@amazon.com>
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@@ -361,3 +361,5 @@ export { | |
WORKSPACE_TYPE, | ||
cleanWorkspaceId, | ||
} from '../utils'; | ||
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export { debounce } from './utils'; |
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@@ -0,0 +1,55 @@ | ||
/* | ||
* Copyright OpenSearch Contributors | ||
* SPDX-License-Identifier: Apache-2.0 | ||
*/ | ||
import { debounce } from './debounce'; | ||
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describe('debounce', () => { | ||
let fn: Function; | ||
beforeEach(() => { | ||
fn = jest.fn(); | ||
jest.useFakeTimers(); | ||
}); | ||
afterEach(() => { | ||
jest.clearAllTimers(); | ||
}); | ||
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test('it should call the debounced fn once at the end of the quiet time', () => { | ||
const debounced = debounce(fn, 1000); | ||
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for (let i = 0; i < 100; i++) { | ||
debounced(i); | ||
} | ||
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jest.advanceTimersByTime(1001); | ||
expect(fn).toBeCalledTimes(1); | ||
expect(fn).toBeCalledWith(99); | ||
}); | ||
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test("with a leading invocation, it should call the debounced fn once, if the time doens't pass", () => { | ||
const debounced = debounce(fn, 1000, true); | ||
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for (let i = 0; i < 100; i++) { | ||
debounced(i); | ||
} | ||
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jest.advanceTimersByTime(999); | ||
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expect(fn).toBeCalledTimes(1); | ||
expect(fn).toBeCalledWith(0); | ||
}); | ||
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test('with a leading invocation, it should call the debounced fn twice (at the beginning and at the end)', () => { | ||
const debounced = debounce(fn, 1000, true); | ||
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for (let i = 0; i < 100; i++) { | ||
debounced(i); | ||
} | ||
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jest.advanceTimersByTime(1500); | ||
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expect(fn).toBeCalledTimes(2); | ||
expect(fn).toBeCalledWith(0); | ||
expect(fn).toBeCalledWith(99); | ||
}); | ||
}); |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,23 @@ | ||
/* | ||
* Copyright OpenSearch Contributors | ||
* SPDX-License-Identifier: Apache-2.0 | ||
*/ | ||
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/** | ||
* @param func The function to be debounced. | ||
* @param delay The time in milliseconds to wait before invoking the function again after the last invocation. | ||
* @param leading An optional parameter that, when true, allows the function to be invoked immediately upon the first call. | ||
*/ | ||
export const debounce = (func: Function, delay: number, leading?: boolean) => { | ||
let timerId: NodeJS.Timeout; | ||
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return (...args: any) => { | ||
if (!timerId && leading) { | ||
func(...args); | ||
} | ||
clearTimeout(timerId); | ||
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timerId = setTimeout(() => func(...args), delay); | ||
}; | ||
}; |
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