


JavaScript implementation of prev and next methods for obtaining adjacent sibling nodes of an element_javascript skills
The example in this article describes the JavaScript implementation of prev and next methods for obtaining adjacent sibling nodes of an element. Share it with everyone for your reference, the details are as follows:
/** * 获取相邻元素 * @param ele 参考物元素 * @param type 类型,上一个(1)or下一个(0) * @return 返回查找到的元素Dom对象,无则返回null */ function getNearEle(ele, type) { type = type == 1 ? "previousSibling" : "nextSibling"; var nearEle = ele[type]; while(nearEle) { if(nearEle.nodeType === 1) { return nearEle; } nearEle = nearEle[type]; if(!nearEle) { break; } } return null; } /** * 获取当前执行对象的上一个元素 */ function prev() { return getNearEle(this, 1); } /** * 获取当前执行对象的下一个元素 */ function next() { return getNearEle(this, 0); } // var ele = document.getElementById("xxx"); // var prevElement = prev.call(ele); // var nextElement = next.call(ele);
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I hope this article will be helpful to everyone in JavaScript programming.

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JavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.

Python is more suitable for data science and automation, while JavaScript is more suitable for front-end and full-stack development. 1. Python performs well in data science and machine learning, using libraries such as NumPy and Pandas for data processing and modeling. 2. Python is concise and efficient in automation and scripting. 3. JavaScript is indispensable in front-end development and is used to build dynamic web pages and single-page applications. 4. JavaScript plays a role in back-end development through Node.js and supports full-stack development.


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