How to write javascript in vs2015

VS2015 (Visual Studio 2015) is a development tool launched by Microsoft. Its integrated development environment (IDE) can support the development and debugging of multiple programming languages ​​(such as C#, VB.NET, C, etc.). As a front-end developer, we often need to use JavaScript language. So, this article will introduce how to write JavaScript code in VS2015.

1. New JavaScript file

First, we need to create a new JavaScript file in VS2015. Select "File" - "New" - "File" in the top menu bar, then select "Web" - "Script File" in the pop-up dialog box, and finally name the file.

2. Writing JavaScript code

In the newly created JavaScript file, we can start writing JavaScript code. We can use the code prompts, syntax highlighting, and auto-complete functions provided by VS2015 to improve our coding efficiency. The following is a simple JavaScript code example:

var num1 = 10;
var num2 = 20;
var sum = num1 + num2;
console.log(sum);

3. Debugging JavaScript code

In VS2015, you can use the debugging function to debug JavaScript code. We can set breakpoints in JavaScript code to inspect the execution of the code. The specific steps are as follows:

3.1 Open the debugging window

Select "Debug" - "Window" - "Debugger" in the top menu bar, or use the shortcut key "Ctrl Shift D" to open debugging window.

3.2 Set breakpoint

Click the left mouse button on the line number where you need to set a breakpoint to set a breakpoint. After the breakpoint is set, a blue circle will appear on the left.

3.3 Start debugging

In VS2015, you can start debugging through the F5 key. When the code execution reaches the breakpoint, the code will stop executing and wait for the user's operation.

4. Code prompts and auto-completion

In VS2015, you can improve code writing efficiency through code prompts and auto-completion. Here are some commonly used code tips and auto-complete functions.

4.1 Code Tips

When you start entering JavaScript code, VS2015 will automatically display a list of available functions and constants. We can use the arrow keys or mouse to select the required functions and constants, and then use the "Tab" key to complete the code entry.

4.2 Automatic completion

When entering code, VS2015 will give automatic completion prompts based on the content we enter. We can use the "Tab" key to select autocomplete prompts, or continue typing to filter the list of prompts.

5. Other functions and plug-ins

In addition to the above basic functions, VS2015 also provides a wealth of other functions and plug-ins to provide developers with a better development experience. For example, you can use the "Web Essentials" plug-in to assist front-end development, including compiling LESS and SASS files, automatically adding CSS prefixes, and code compression. At the same time, VS2015 also supports the integration of other commonly used JavaScript frameworks (such as jQuery, AngularJS, etc.).

Summary

In this article, we introduced how to write JavaScript code in VS2015. By using the functions and plug-ins provided by VS2015, we can improve our development efficiency and easily debug and test. Of course, for different development needs and coding habits, customized settings and configurations can also be made to achieve better development and debugging effects.

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