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1, Introduction to JavaScript JavaScript introduction JavaScript was born in 1995. It is mainly used to deal with front-end verification in web pages. JavaScript is one of the most popular languages in the world. It is a scripting language running on the client (Script means Script) Scripting language: no compilation is required. The js ...

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Object. Use of defineproperty() method Object. The defineproperty () method will directly define a new property on an object, or modify an existing property of an object and return the object. Object.defineProperty(obj, prop, descriptor) Parameters: obj: object to define attributeprop: the name or Symbol of the attribute to be defined or ...

Scaffolding The purpose of scaffolding is to quickly build the basic structure of the project and provide project specifications and conventions. At present, the scaffolds commonly used in daily work include Vue cli, create react app, angular CLI and so on. They all complete the rapid construction of content through simple initialization comma ...

Vue overview It is a javascript frameworkDOM operations can be simplifiedResponsive data driven el: mount point Scope of vue instance: vue will manage the elements hit by el option and its internal descendant elements.Other selectors can be used, but id selectors are recommendedOther double tags can be used, but HTML and BODY cannot be used. ...

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Introduction to jQuery: jQuery is an efficient, concise and feature rich JavaScript library. Its API is easy to learn and compatible with many browsers. It greatly simplifies the development of JavaScript code, including HTML element selection, HTML element operation, CSS operation, HTML event function, JavaScript special effects and animation ...

catalogue Block element Form form form validation:  action: keyword: button: Common block labels list form Row element Common row element labels a: Hyperlink label Inline block element img: import pictures Input: input box Type: input box type Input box content Label: expand the selection area textarea: multi line input bo ...

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Annotation implementation Preparation for annotation development Jar package required for annotation. The annotation function is encapsulated in the AOP package and imported into Spring aop jar <!--open spring Annotation scanning --> <context:component-scan base-package="com.qn.spring"/> spring's annotations on classes incl ...