How to read javascript code in 360 browser

With the rapid development of the Internet, JavaScript, as an important web programming language, plays an extremely critical role in the construction of modern web pages. In web design and web development, JavaScript is undoubtedly one of the indispensable technologies. As a widely used browser, 360 Browser's built-in JavaScript debugging tool can help web designers view and debug JavaScript code more conveniently.

1. Improve the usage efficiency of Chrome debugging tools
Supporting Chrome debugging tools is a rare feature of 360 browser. Since the core of the 360 ​​browser is basically the same as the Chrome browser, when debugging JavaScript code in the 360 ​​browser using Chrome's debugging tools, you can operate with almost no difference. In view of the powerful debugging tools of the Chrome browser, when using the 360 ​​browser to debug JavaScript, you can learn and master the skills of using the Chrome debugging tools to improve operational efficiency.

1. Use the debugging console
The debugging console in the Chrome browser's debugging tools is one of the most commonly used tools for debugging JavaScript code. In 360 Browser, the debug console is used in the same way as Chrome. You can open the debugging console by doing the following:

Find the JavaScript code snippet that needs to be debugged in the current web page.

Press the F12 shortcut key on your keyboard or select Menu > More Tools > Developer Tools > Console in the menu bar.

The debugging console provides a wealth of functions, including:

Execute JavaScript code;
Call various API functions;
Monitor the performance of web pages;
View pages Structure and style etc.

2. Use the Console API
The console provides many convenient Console APIs for debugging JavaScript code. The Console API is a set of web APIs that can be used in JavaScript code to automatically print out debugging information.

There are a series of API functions in the Console panel of the console, including:

console.log();
console.table();
console.error();
console.warn();
console.info();
console.assert();
console.dir();
console.count() etc.

Because these API functions are very rich, they can help developers quickly locate errors and problems loaded in debugging code and improve development efficiency.

3. Use the Sources panel
In Chrome, the Sources panel can help developers easily debug JavaScript code, and in the 360 ​​browser, the Sources panel is used similarly to Chrome.

In the Sources panel, developers can:

View the HTML and CSS code of the page;
View the JavaScript code;
Track and debug in the code;
Observe the code variables , and modify them during the execution of JavaScript;
Breakpoint debugging code, etc.

2. Use 360 ​​Browser’s debugging tool for JavaScript debugging
In addition to using Chrome’s debugging tool, 360 Browser also provides its own built-in JavaScript debugging tool, making it an efficient and convenient development tools. The following describes how to use JavaScript debugging tools in the 360 ​​browser.

1. Open the Developer Tools menu
Click the "Menu" button in the menu bar of the 360 ​​browser, select "More Tools", and then click "Developer Tools" to open the debugging tool .

2. Open the debugging tool
In the developer tools interface, select the "Debug" panel or press the F12 shortcut key on the keyboard to enter the JavaScript debugging mode.

3. Set breakpoint
Right-click on a certain line of code and select "Add Breakpoint" to set it as a breakpoint. In debugging mode, JavaScript code execution will stop when it reaches the set breakpoint. You can view the variable values ​​before the breakpoint and the current code execution status.

4. Continue to execute code
In the case of stopping execution, developers can choose to continue executing code until the next breakpoint is encountered or the program ends. In debugging mode, you can use the two methods of "line-by-line execution" (click the "F10" key) and "statement-by-statement execution" (click the "F11" key) to control the execution flow of the program.

5. Check variable values
When the program pauses execution, developers can check the variable values ​​in the current code and modify these values ​​in debug mode. The "Monitor" tab in the right panel allows developers to add variables they want to monitor, while the "Variables" tab in the left panel allows developers to view the current values ​​of variables.

3. Summary
In today's digital era, JavaScript, as a basic technology for web development, determines the emotional color and functional richness of the page to a certain extent. During the JavaScript programming process, developers often need to debug to improve programming efficiency and code quality. On this basis, the built-in debugging tools of 360 Browser and the debugging tools of Chrome browser can help developers improve debugging efficiency and code readability, thereby better realizing their own designs and improving user experience.

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