inspect element

1.js getting elementsvarTest = document.getElementById ("Test");varparent = Test.parentnode;//parent NodevarChils = Test.childnodes;//All child nodesvarfirst = Test.firstchild;//first child nodevarlast = Test.lastchile;//Last child nodevarprevious = test.previoussbiling;//Previous sibling nodevarNext = test.nextsbiling;//Next Sibling node2.jquery getting elements$ ("#test1"). Parent ();//parent Node$ ("#test1"). Parents ();//All parent Nodes$ ("#test1"). Parents (". Mui-content"));$("#test"). Ch

During routine web programming or UI Automation scripting, it is often necessary to determine the display state of the page elements to perform the corresponding actions. This article mainly to JS to judge the existence of page elements as an example, a brief description of how JS is to determine the state of the display of elements, please refer to the small owners. If there are shortcomings, please the great God to correct it, greatly appreciated!Many do not say, small two on the code slightly

How does js determine whether an element gets the focus? js determines the element focus. How does js determine whether an element gets the focus:There may be few requirements in practical applications, or the following method may be used to determine whether the element is too straightforward, but the principle is al

Determine whether this element exists on the page of jquery. The jquery Element When I was writing jquery, I sometimes used jq to determine whether an element exists on the page. At the beginning, I thought: If ($ (obj). parent (). parent (). find ('. poa-list') = undefind) // determine whether the dd element exists

Javascript uses the element id and name to directly obtain the element. This article mainly introduces the method for javascript to directly obtain elements through element id and name. It involves some techniques related to javascript to obtain elements and is very useful. For more information, see This example describes how to use javascript to directly retriev

How to Use jquery to obtain the index number of the current element in the same generation element is described in the following example: If I bind a click event to each img element, how can I know which img I am currently clicking in the click function? That is, how does one know its index number? (For example, if a single ad1.jpg request is returned, the retur

JS in an IFRAME to manipulate the DOM of the parent window, you must understand several objects: Parent (if the window is a top-level window, then Parent==self==top) Top is the top-level parent window (some windows have several layers of frameset or IFRAME) Self is the current window (equivalent Windows) Parent page: index.htmlchild window: children.html " utf-8 >$ (function () { var P_window = Window.top; Alert ($ (p_window). Height ()); var P_demo = window.top.do

/** Algorithm Function: creates a single-chain table and outputs the k-th element at the bottom of the single-chain table (note that the last element in the single-chain table is the last element in the single-chain table). It outputs the intermediate element of the single-chain table. * Function Description: * 1. getk

Var obj = document. getElementById ("id"); the dom object is obtained, and the js method is used for operations on this object. Var obj = $ ("# id"); The jquery object is obtained. The jquery method is used for operations on this object. 1. traverse the objects obtained above (1). js method for (vat I = 0; j (2). jquery method $ ("# id"). each (function () {$ (this) to obtain a corresponding element }); 2. Obtain the parent

You may have encountered such a requirement, a highly unstable area (content created by the user), and when the mouse passes through the area or its divine horse operation, it needs to appear a template as large as that of the area;We use a span to handle this mask. Because the heights of. Sample-1 and. Sample-2 are indeterminate, that is, we do not define height for them. If the parent element does not have a height defined, the child

The el-input of element-ui cannot be used by vue to listen to the carriage return event. element-uiel-input Cause When using element-ui today, the el-input component cannot listen to the carriage return event. The following Code does not have the desired effect: The reason should be that element-ui encapsulates an

To use the element object, you first get the element object, which can be obtained by using the method in document* Get Element Objectvar Input=document.getelementbyid ("To get the ID of the element");* Get the value inside the propertyalert (Input.value); CommonAlert (Input.getattribute ("value")); You can get propert

Original: JS child element Oumouseover Trigger parent element onmouseoutIn JavaScript, the parent element contains child elements:When the parent sets onmouseover and onmouseout, the mouse moves from the parent to the child, triggering the onmouseout of the parent and then triggering the onmouseover- , onmouseover is triggered after the parent's oumouseout is tri

A few days ago to do adaptive skin to understand the meaning of blocks (block). Found such a problem. What is the difference between a SPAN element and a DIV element Solution Idea: The most obvious difference is that Div is a block element and span is an inline element. A block ele