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| /** | |
| * Creates a function that invokes `func`, with the `this` binding and arguments | |
| * of the created function, while it's called less than `n` times. Subsequent | |
| * calls to the created function return the result of the last `func` invocation. | |
| * | |
| * @since 3.0.0 | |
| * @category Function | |
| * @param {number} n The number of calls at which `func` is no longer invoked. | |
| * @param {Function} func The function to restrict. | |
| * @returns {Function} Returns the new restricted function. | |
| * @example | |
| * | |
| * jQuery(element).on('click', before(5, addContactToList)) | |
| * // => Allows adding up to 4 contacts to the list. | |
| */ | |
| function before(n, func) { | |
| let result | |
| if (typeof func !== 'function') { | |
| throw new TypeError('Expected a function') | |
| } | |
| return function(...args) { | |
| if (--n > 0) { | |
| result = func.apply(this, args) | |
| } | |
| if (n <= 1) { | |
| func = undefined | |
| } | |
| return result | |
| } | |
| } | |
| export default before |