jquery tree remove url

In the past web development, there has been an increasing demand for using JavaScript libraries. Among them, jQuery is a fast and concise JavaScript library created by John Resig, which encapsulates many commonly used functions, such as DOM operations, event processing, AJAX requests, etc. In web development, it is often necessary to display and operate data in a tree structure. For this need, jQuery tree is a commonly used tool.

However, when using jQuery tree for data display, many developers struggle with how to remove the URL link on the node to avoid user misoperation. This article will detail how to implement this feature.

1. Understand jQuery tree

Before we start to remove URL links on nodes, we need to first understand the jQuery tree structure and related basic operations. jQuery tree is a front-end JavaScript library used to display and operate tree-structured data. For example, we can use jQuery tree to display tree-shaped data in scenarios such as product categories, department structure levels, etc.

Generally speaking, when a node is in the expanded state, the node will display a URL link so that users can directly access the content represented by the node. However, in some actual projects, developers need to hide this URL link to prevent users from accidentally clicking on the node, causing the page to jump and affecting the user experience.

2. Methods to remove jQuery tree node URL links

When removing node URL links, we can use the following two methods.

1. Removal through CSS styles

We can set the href attribute in all a tags (links) to an empty string through CSS style settings, thereby achieving the purpose of hiding node URL links. . The specific implementation code is as follows:

$(document).ready(function(){
  $(".tree li:has(ul)").addClass("parent_li");
  $(".tree li.parent_li > span").attr("title", "Collapse this branch");
  $(".tree li.parent_li > span").children("i:first-child").addClass("glyphicon-folder-open");
  $(".tree li.parent_li > span").children("i:first-child").removeClass("glyphicon-folder-close");

  $(".tree li.parent_li > span").on("click", function (e) {
    var children = $(this).parent("li.parent_li").find(" > ul > li");
    if (children.is(":visible")) {
        children.hide("fast");
        $(this).attr("title", "Expand this branch").children("i:first-child").addClass("glyphicon-folder-close").removeClass("glyphicon-folder-open");
    } else {
        children.show("fast");
        $(this).attr("title", "Collapse this branch").children("i:first-child").addClass("glyphicon-folder-open").removeClass("glyphicon-folder-close");
    }
    e.stopPropagation();
  });
  
  //将节点链接URL内容设置为空字符串
  $(".tree a").attr("href", "");
});

In the above code, we take out all the a tags of the jQuery tree and set their href attributes to empty strings. In this way, the purpose of hiding the node URL link can be achieved.

2. Remove it by modifying the JavaScript code

In another implementation, we directly remove the node URL link in the JavaScript code. The specific implementation code is as follows:

$(document).ready(function(){
  $(".tree li:has(ul)").addClass("parent_li");
  $(".tree li.parent_li > span").attr("title", "Collapse this branch");
  $(".tree li.parent_li > span").children("i:first-child").addClass("glyphicon-folder-open");
  $(".tree li.parent_li > span").children("i:first-child").removeClass("glyphicon-folder-close");

  $(".tree li.parent_li > span").on("click", function (e) {
    var children = $(this).parent("li.parent_li").find(" > ul > li");
    if (children.is(":visible")) {
        children.hide("fast");
        $(this).attr("title", "Expand this branch").children("i:first-child").addClass("glyphicon-folder-close").removeClass("glyphicon-folder-open");
    } else {
        children.show("fast");
        $(this).attr("title", "Collapse this branch").children("i:first-child").addClass("glyphicon-folder-open").removeClass("glyphicon-folder-close");
    }
    e.stopPropagation();
  });

  //将节点链接URL及其父级节点的URL都设置为空字符串
  $(".tree a").each(function(){
    var node=$(this).parent("li");
    if(node.hasClass("parent_li")){
      $(this).attr("href","javascript:void(0);");
    } else{
      $(this).removeAttr("href");
    }
  });
});

In the above code, we use the each method of jQuery tree to traverse all a tags and determine whether the parent node has the "parent_li" class. If so, link the node URL Set to an empty string. If not, directly remove the href attribute on the tag.

3. Summary

In this article, we introduced how to remove the URL link of the node in the jQuery tree. In two different ways, you can hide node URL links according to actual needs. Especially in some complex web applications, it is often necessary to display tree data structures, and operations such as hiding URL links can help developers improve user experience and user interactivity.

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