Shulou(Shulou.com)05/31 Report--

Most people do not understand the knowledge points of this article "how to use the find method in the js array", so the editor summarizes the following contents, detailed contents, clear steps, and has a certain reference value. I hope you can get something after reading this article. Let's take a look at this "how to use the find method in the js array" article.

1. Find returns the value of the first element in the array that meets the condition, otherwise it returns undefined.

2. The find method executes the callback function on each element in the array and returns the first element value of true.

3. Find does not change the original array.

Example

Array.prototype._find = function (callback) {let res = undefined for (var item0)

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.