Is the scope chain of JavaScript determined when a function is defined or when it is called?

I saw the following closure problem {code...}. It prints 10 instead of 20. When x is getting the value, doesn’...

From [JavaScriptdiscussion group] 2017-07-05 10:42:15 0  5  1204

javascript - js cross-domain request error: Refused to set unsafe header "Referer"?

Trying to use cross-domain request for data from another website in my website program. The target website nee...

From [JavaScriptdiscussion group] 2017-07-05 10:42:13 0  2  3186

javascript - Front-end interviews often ask what is the most difficult problem you encountered in the project? How do you answer this?

Our company's new project is very simple and not difficult, but it is really difficult to understand. I just w...

From [JavaScriptdiscussion group] 2017-07-05 10:42:11 0  2  1348

javascript - use of setTimeout

http://ife.baidu.com/course/d... I am doing a question from Baidu Front-End Academy, the link is as above. The...

From [JavaScriptdiscussion group] 2017-07-05 10:42:09 0  2  1074

javascript - Why are the margin values ​​different between using native js to get the body and using jquery to get the body?

{code...}

From [JavaScriptdiscussion group] 2017-07-05 10:42:07 0  2  842

javascript - Add a tr tag to a table tag. When the table tag is displayed on the console, there are 2 child elements? What I want is that the tr tag is included in the table tag

{code...}

From [JavaScriptdiscussion group] 2017-07-05 10:42:04 0  2  841

javascript - Can't js be introduced into the vue project to control the class of elements?

This is the situation in the console in the imported js. This is the situation in the elements, and the nav ha...

From [JavaScriptdiscussion group] 2017-07-05 10:42:02 0  3  915

javascript - lodash source code, question about why == is used in slice method

I have always believed that using == in the code will cause users or readers of the code to consider implicit ...

From [JavaScriptdiscussion group] 2017-07-05 10:41:59 0  1  1025

javascript - vuex reports an error this.$store.dispatch is not a function, how to solve it?

After copying the official vuex examples before, I planned to make a demo with complete HTML, CSS, and more co...

From [JavaScriptdiscussion group] 2017-07-05 10:41:57 0  2  3069

What are the ways to convert strings to integers in JavaScript and which one is the fastest?

What are the methods. Which method is fastest! Number()parseInt()

From [JavaScriptdiscussion group] 2017-07-05 10:41:53 0  8  1035

javascript - ES6 Module can directly import commonJS modules. Is this implemented directly in ES6, or is it implemented when converting to Babel?

A package written in CommonJS specifications can be directly introduced using the syntax {code...}. This is im...

From [JavaScriptdiscussion group] 2017-07-05 10:41:50 0  1  896

Problem with es6 spread operator...

I can understand the expansion operator for copying arrays, but I don't understand how it is used to pass para...

From [JavaScriptdiscussion group] 2017-07-05 10:41:47 0  8  969

javascript - Please explain the following algorithm code

It’s about the code of this algorithm, implemented in javascript, but I don’t understand the algorithm below. ...

From [JavaScriptdiscussion group] 2017-07-05 10:41:45 0  1  918

javascript - After using ng build --prod --aot to package angular2, the js is still very large. What should I do?

Use angular2 to package and compile files. After aot compilation in the production environment, the js size is...

From [JavaScriptdiscussion group] 2017-07-05 10:41:43 0  1  1270

javascript - How to solve the time mechanism problem when using js to implement remote js calls?

I want to separate a project from the js it calls. To modify the js, I only need to upload the js file. No oth...

From [JavaScriptdiscussion group] 2017-07-05 10:41:40 0  2  875