javascript console settings

In front-end development, the JavaScript console is an important tool, which can provide developers with a real-time environment to view and debug code. In the console, developers can monitor variable values, execute functions, view network requests, and output error messages, etc. This article will introduce how to set up JavaScript console in different browsers.

1. Set up the console in Chrome

In the Chrome browser, you can open the console through the following steps:

1. Open Chrome browser browser;
2. Select "More Tools" -> "Developer Tools" from the three dots in the upper right corner of the browser window;
3. Or directly press the shortcut key "Ctrl Shift I " to open the developer tools panel;
4. Select the "Console" tab in the newly opened panel.

In the console, by default, the color of the code is black, and the color of the content output by the console.log() method is white. We can change this color setting by entering the following code in the console:

console.log("%cHello World!", "color: red; font-size: 30px");

%c here is a placeholder, and the parameters following it are used to set the text color and font size.

2. Set up the console in Firefox

The Firefox browser also provides a JavaScript console to assist developers in debugging code. In the Firefox browser, you can open the console through the following steps:

1. Open the Firefox browser;
2. Select "Developer" from the three horizontal lines in the upper right corner of the browser window " -> "Web Console";
3. Or directly press the shortcut key "Ctrl Shift K" to open the Web Console panel;
4. Select "Console" in the newly opened panel Tab.

In the Firefox console, you can also use the %c placeholder to change the color and font size of the output text.

3. Set up the console in Safari

The Safari browser also provides a JavaScript console. You can open the console through the following steps:

1. Open the Safari browser;
2. Select "Show Web Inspection Tool" in the "Develop" menu above the browser window;
3. Or directly press the shortcut key "Option Command C" to open it Web inspection tool;
4. Select the "Console" tab in the newly opened Web inspection tool panel.

In Safari, we can use the console.table() method to output array data to the console in the form of a table. For example:

console.table([{name: "Tom", age: 18}, {name: "Jerry", age: 20}]);

The output result is as follows:

In addition to the methods mentioned above, the console of each browser provides many related methods and tools to help developers debug . In actual development, mastering these debugging techniques and skills will greatly improve our development efficiency, and also allow us to better understand the running of the code and the troubleshooting process.

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