The following is an introduction to the operation of jquery on select. It is very good. The content introduction is as follows:
The html tag of select is as follows:
<select class="xxx" id="yyy"><option></option>...<option></option></select>
1. Set the option with value as "lll" to select
$('#yyy').val("lll");或者$('.xxx').val("lll")
can be used to let select automatically select an item, such as selecting an item whose value passed from the background is the same as the value of the option
2. Set the text to "lll" to select the option
$('#yyy').find("option[text="lll"]").attr("selected","selected");或者$('。xxx').find("option[text="lll"]").attr("selected","true");
3. Get the value of the currently selected item
$('#yyy').val(); or $('.xxx').val();
4. Get the text of the currently selected item
$('#yyy').find("option:selected").text()或者$('#yyy option:selected').text()
The above is the detailed explanation of the select operation in jQuery introduced by the editor

Linking CSS files to HTML can be achieved by using elements in part of HTML. 1) Use tags to link local CSS files. 2) Multiple CSS files can be implemented by adding multiple tags. 3) External CSS files use absolute URL links, such as. 4) Ensure the correct use of file paths and CSS file loading order, and optimize performance can use CSS preprocessor to merge files.

Choosing Flexbox or Grid depends on the layout requirements: 1) Flexbox is suitable for one-dimensional layouts, such as navigation bar; 2) Grid is suitable for two-dimensional layouts, such as magazine layouts. The two can be used in the project to improve the layout effect.

The best way to include CSS files is to use tags to introduce external CSS files in the HTML part. 1. Use tags to introduce external CSS files, such as. 2. For small adjustments, inline CSS can be used, but should be used with caution. 3. Large projects can use CSS preprocessors such as Sass or Less to import other CSS files through @import. 4. For performance, CSS files should be merged and CDN should be used, and compressed using tools such as CSSNano.

Yes,youshouldlearnbothFlexboxandGrid.1)Flexboxisidealforone-dimensional,flexiblelayoutslikenavigationmenus.2)Gridexcelsintwo-dimensional,complexdesignssuchasmagazinelayouts.3)Combiningbothenhanceslayoutflexibilityandresponsiveness,allowingforstructur

What does it look like to refactor your own code? John Rhea picks apart an old CSS animation he wrote and walks through the thought process of optimizing it.

CSSanimationsarenotinherentlyhardbutrequirepracticeandunderstandingofCSSpropertiesandtimingfunctions.1)Startwithsimpleanimationslikescalingabuttononhoverusingkeyframes.2)Useeasingfunctionslikecubic-bezierfornaturaleffects,suchasabounceanimation.3)For

@keyframesispopularduetoitsversatilityandpowerincreatingsmoothCSSanimations.Keytricksinclude:1)Definingsmoothtransitionsbetweenstates,2)Animatingmultiplepropertiessimultaneously,3)Usingvendorprefixesforbrowsercompatibility,4)CombiningwithJavaScriptfo

CSSCountersareusedtomanageautomaticnumberinginwebdesigns.1)Theycanbeusedfortablesofcontents,listitems,andcustomnumbering.2)Advancedusesincludenestednumberingsystems.3)Challengesincludebrowsercompatibilityandperformanceissues.4)Creativeusesinvolvecust


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

SublimeText3 English version
Recommended: Win version, supports code prompts!

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Dreamweaver CS6
Visual web development tools

Atom editor mac version download
The most popular open source editor
