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From JS Tutorial
Two ways to determine whether ...
A simple JS method to determine whether a function exists, involving operating techniques related to...
Detailed explanation of exampl...
Whether the specified function exists function isExitsFunction(funcName) { try { if (typeof(eval(fun...
Different understandings and a...
First of all, all global variables are attributes of window. The statement var a = 1; is equivalent ...
How to declare JS variable sco...
The scope of variables in JS is divided into global variables and local variables. Those defined wit...
Discuss some techniques in usi...
js supports the following types of variables: local variables, class variables, private variables, i...
How to understand types, param...
The basic type values are: undefined, NUll, Boolean, Number and String. These types occupy a fixed...
A variable that is not declared within a function or declared without var is a global variable. It h...
Detailed explanation of JavaSc...
Variable scope is a topic that every programming language touches, and it is also a knowledge point ...
How to better understand JavaS...
Javascript is different from languages such as Java and C. It is an untyped and weakly detected ...
Detailed example of how to dis...
Within a function, variables declared with var and without var are different. Those declared with va...
