package.src.utils.once.js Maven / Gradle / Ivy

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The rugged, minimal JavaScript framework

There is a newer version: 3.14.1


export function once(callback, fallback = () => {}) {
    let called = false

    return function () {
        if (! called) {
            called = true

            callback.apply(this, arguments)
        } else {
            fallback.apply(this, arguments)
        }
    }
}