未加星标

JavaScript Console Tips & Tricks

字体大小 | |
[前端(javascript) 所属分类 前端(javascript) | 发布者 店小二03 | 时间 2019 | 作者 红领巾 ] 0人收藏点击收藏

javascript, and the tools around it, have advanced a lot during the last couple of years. So, below you will see few tips and tricks that I find useful in my day-to-day development workflow, in regards to console logging.

01. Custom Css Styling in your console log statements

You can add custom styling to your log statements using the %c attribute.

E.g. you can separate the values of a and b using a Green and Orange text:

var a = { id: 1, name: 'Paris' }; var b = { id: 2, name: 'Bill' }; console.log('%c Section 1', 'color: green; font-weight: bold'); console.log(a); console.log('%c Section 2', 'color: orange; font-weight: bold'); console.log(b);
JavaScript Console Tips & Tricks
02. Log results in table format

Sometimes, it’s much easier to log results in a table structuring using console.table() .

Let’s assume you have the following values:

var a = { id: 1, name: 'Paris' }; var b = { id: 2, name: 'Bill' };

You can log them as object:


JavaScript Console Tips & Tricks

or as an array:


JavaScript Console Tips & Tricks
03. Measure how long it takes for an operation to complete

If you have a function or a piece of code that you want to measure how long it takes to complete, you can use console.time and console.timeEnd .

E.g. to measure how long it takes to sum 1000 values and with the following code:

console.time('Sum'); let sum = 0; for ( let i = 0; i < 1000; i++ ) { sum += i; } console.timeEnd('Sum');

the output will look like this:


JavaScript Console Tips &amp; Tricks
04. Log values with Property Names

If you have multiple values that you want to log, sometimes it’s easier to have also the property name next to the object values:

var a = { id: 1, name: 'Paris' }; var b = { id: 2, name: 'Bill' }; // instead of this console.log(a, b); // do this console.log({a, b});

and the output will look like this:

本文前端(javascript)相关术语:javascript是什么意思 javascript下载 javascript权威指南 javascript基础教程 javascript 正则表达式 javascript设计模式 javascript高级程序设计 精通javascript javascript教程

分页:12
转载请注明
本文标题:JavaScript Console Tips &amp; Tricks
本站链接:https://www.codesec.net/view/628300.html


1.凡CodeSecTeam转载的文章,均出自其它媒体或其他官网介绍,目的在于传递更多的信息,并不代表本站赞同其观点和其真实性负责;
2.转载的文章仅代表原创作者观点,与本站无关。其原创性以及文中陈述文字和内容未经本站证实,本站对该文以及其中全部或者部分内容、文字的真实性、完整性、及时性,不作出任何保证或承若;
3.如本站转载稿涉及版权等问题,请作者及时联系本站,我们会及时处理。
登录后可拥有收藏文章、关注作者等权限...
技术大类 技术大类 | 前端(javascript) | 评论(0) | 阅读(17)