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2022 latest front end specification [1] Necessary 1, Quote2, Object3, Array4, Character5, Attributes6, Variable7, Comparison operator and equal sign8, Notes9, Type conversion and cast10, Naming conventions11, VUE related specifications [2] Recommend 1, Deconstruction2, Loop (iterator)3, Control statement4, Object [1] Necessary ...

preface❤️ How much talent a person has, how much humility will be engraved in his bones ❤️ 1, JavaScript event advanced (1) Registration event (binding event) 1.1 overview of registration events one ️⃣ Adding an event to an element is called a registration event or a binding event. two ️⃣ There are two ways to register events: traditi ...

1. General Caterpillar effect: In one experiment, many caterpillars were placed on the edge of a flowerpot to make them connect head to tail and form a circle. Then sprinkled some caterpillar food near the flowerpot. At this time, caterpillars do not climb in the direction of food, but circle one by one at the edge of the flowerpot until they d ...

Core basic content of Javascript 01. Scope and scope chain Scope determines the accessibility of variables or functions. In JavaScript, there are two types of scope: local scope and global scope. There are three types of variables / functions with global scope: 1.Variables and functions defined at the outermost layer have global scope 2.Variabl ...

Promise meaning Promise is a solution for asynchronous programming, which is more reasonable and powerful than traditional solutions - callback functions and events. It was first proposed and implemented by the community. ES6 has written it into the language standard, unified the usage, and provided promise objects natively. Promise is simply ...

1. Regular expression overview 1.1 what is a regular expression Regular Expression is a pattern used to match character combinations in a string. In JavaScript, regular expressions are also objects. The text boxes that match the regular name and number in the search form (for example, the text boxes that match the regular name and number ...

The plug-in library often needs to be developed globally, or exception handling is required:Handle exceptions globally;Prompt error messages for developers;Scheme degradation processing, etc.So how to realize the above functions?This paper first briefly implements an exception handling method, then introduces it in detail combined with the impl ...

data type It is divided into simple type (basic type) and complex type (reference data type) Basic types: String, number, Boolean, Null, Undefined, Symbol(ES6 added). Complex types: object, array, function. Note: both Array and Function are subclasses of object, so there is only one kind of object in the strict sense of complex type, which ca ...

One of Vue's most unique features is its non intrusive response system. The data model is just a normal JavaScript object. When you modify them, the view updates. When talking about the principle of Vue responsive implementation, many developers know that the key to implementation is to use object Defineproperty, but how is it implemented? Toda ...

[JavaScript] Web magnifying glass effect case Deepen the understanding and application of e.pageX, e.pageY, offsetLeft, offsetTop, offsetWidth and offsetHeightApplication of mouse events mouseover, mouseout and MouseMove Implementation effect: the mouse moves in the small picture on the left, and the enlarged effect of this part of the area i ...