Summary and sharing of error-prone knowledge

Preface This article is about some error-prone knowledge points that I collected and organized in the process of learning JavaScript. It will be divided into six aspects: variable scope, type comparison, this pointer, function parameters, closure issues, and object copying and assignment. A step-by-step introduction and explanation, which also involves some ES6 knowledge points. JavaScript knowledge points 1. Variable scope var a = 1; function test() { var a = 2; console.log(a); // 2 } a is declared and assigned in the function scope above test(); and is above the console, so the output a is equal to 2 following the proximity principle. var a = 1; function test2()&am

1. Recommended 4 articles about error-prone knowledge points

##Introduction: Preface This article is about some error-prone knowledge points that I collected and organized in the process of learning JavaScript. It will start from variable scope, type comparison, this pointer, function parameters, closure issues and objects. The six aspects of copying and assignment are introduced and explained from the shallower to the deeper, which also involves some ES6 knowledge points. JavaScript knowledge points 1. Variable scope var a = 1;function test() {  &nbs...

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A compilation of some JavaScript knowledge points that are easy to make mistakes

##Introduction: Preface This article is a summary of the knowledge and skills I collected during the process of learning JavaScript. Some error-prone knowledge points have been compiled, starting from the six aspects of variable scope, type comparison, this pointer, function parameters, closure issues, and object copying and assignment...

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Detailed explanation of JavaScript error-prone knowledge points

Introduction: Preface to this article These are some error-prone knowledge points that I collected and organized during the process of learning JavaScript. They will be introduced from the simple to the deeper aspects of variable scope, type comparison, this pointer, function parameters, closure issues, and object copying and assignment. and explanation, which also involves some ES6 knowledge points. JavaScript knowledge points 1. Variable scope var a = 1; function test() { var a = 2; console.log(a); // 2 } test(); The above function functions...

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Compilation of JavaScript error-prone knowledge points

##Introduction: This article These are some error-prone knowledge points that I collected and organized during the process of learning JavaScript. They will be introduced from the simple to the deeper aspects of variable scope, type comparison, this pointer, function parameters, closure issues, and object copying and assignment. and explanation, which also involves some ES6 knowledge points.

5. Complete common JavaScript error-prone knowledge points

##Introduction: This article is some error-prone knowledge points that I collected and organized in the process of learning JavaScript. It will cover the six aspects of variable scope, type comparison, this pointer, function parameters, closure issues, and object copying and assignment. Each aspect is introduced and explained from the shallower to the deeper, which also involves some ES6 knowledge points

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