One of the most popular settings for the linter is Airbnb JavaScript Style. eslintrc configuration file, which can be global or local for the project. Many of the rules available in ESLint are disabled, but you can enable them in. Therefore, many errors can only be identified at the run-time. It has better ES6 support than other linters.ĮSLint is very useful in JavaScript, since an interpreted language, JS has no compilation step. It’s flexible, easy to extend, and comes with a lot of customizable rules, and the possibility to apply different styles. ESLintįirst of all, you will need a linter, a static code analysis tool for identifying problematic templates. You don’t have to remember all these rules and manually edit the whole code, you can use special tools for this purpose. Tools: ESLint, Prettier, Code Spell Checker, SonarQube If the method changes context, use an additional indent. If it is too long to fit on one string, each method call should be on a separate string and the first one shall be located on the next string after the name of the object, which methods are called. When condition is too long to fit on one string, subsequent strings should be indented one additional level to distinguish them from the core code.For example, each expression of a ternary operator is better placed on its own string, even if both fit on the same string. Strings should be split into logical groups if this improves their readability.When a sentence is too long for a single string, string breaks should be inserted after statements.A closing parenthesis should be on the string following the last block statement. An opening parenthesis should be on the same string as the function definition, condition, or cycle start. in-line comments are allowed as an exception.īlocks if, else, for, while, try should always use curly brackets and be on multiple strings.for long comments, use multi-string comments.there should be one space between the comment symbol ( //) and the comment text.place a full stop at the end if your comment is a complete sentence.a null string should precede the comment.comments should precede the code they relate to.Strings are usually written with 80 characters in length utmost and should not exceed 100 (considering each tab as 4 spaces). Do not use spaces at the end of the strings or on empty strings Even if the entire file is included in an enclosed structure (e.g., in a function), the contents of the function should be indented in one tab. If any string contains a single quote character, consider template strings to avoid quitting the quotation area.īy using intervals you can also improve the readability of your code. Regular lowercase literals are enclosed in single quotes. Use single quotes rather than double ones Moreover, they can be on multiple strings.Ħ. You can designate them by using back quotes ` instead of a complex string combination, especially in case of several lowercase literals. Use template strings instead of combining them Choose arrow functions instead of function word, especially in nested functions.ĥ. The word var should not be used.Īrrow functions give a concise syntax and solve a lot of complexities therewith. Use const by default until the variable needs to be reassigned. Just don’t keep using horizontal alignments where they already exist.ĭeclare all local variables with const or let. In general, it is considered bad style if you follow Google’s advice, but sometimes it can be acceptable. It is a practice when you can add a large number of spaces in your code so that certain characters appear directly below the characters on the previous string. Horizontal alignment is bad, although not prohibited We’ll share the most interesting points and relevant rules with you.Įvery ad must end with a semicolon. Google and Airbnb developers have two of the most popular style guides on this topic. JavaScript code styling / JavaScript coding standards
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