build/internal/onlyOnce.js


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'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.default = onlyOnce;
function onlyOnce(fn) {
    return function () {
        if (fn === null) throw new Error("Callback was already called.");
        fn.apply(this, arguments);
        fn = null;
    };
}
module.exports = exports['default'];