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code-block-writer
Advanced tools
A simple code writer that assists with formatting and visualizing blocks of code.
The code-block-writer npm package is a utility for generating code with proper formatting, such as indentation and line breaks. It is particularly useful when writing code generators or transpilers that need to output human-readable code.
Writing code with automatic indentation and new lines
This feature allows you to write code blocks with automatic indentation management. The code sample demonstrates how to create a class with a constructor and a property.
const CodeBlockWriter = require('code-block-writer');
const writer = new CodeBlockWriter();
writer.writeLine('class MyClass {').indent(() => {
writer.writeLine('constructor() {').indent(() => {
writer.writeLine('this.myProperty = 1;');
}).writeLine('}');
}).writeLine('}');
console.log(writer.toString());
Conditional writing
This feature enables writing parts of the code conditionally. In the code sample, 'someCondition' is only written if the 'condition' is true.
const writer = new CodeBlockWriter();
const condition = true;
writer.write('if (').conditionalWrite(condition, 'someCondition').writeLine(') {').indent(() => {
writer.writeLine('doSomething();');
}).writeLine('}');
console.log(writer.toString());
Block indentation
This feature allows for easy indentation of entire blocks of code. The code sample shows how to write a function with multiple lines inside its body, all properly indented.
const writer = new CodeBlockWriter();
writer.writeLine('function myFunction() {').indentBlock(() => {
writer.writeLine('let x = 10;').writeLine('return x;');
}).writeLine('}');
console.log(writer.toString());
Prettier is an opinionated code formatter that supports many languages and integrates with most editors. Unlike code-block-writer, which is used for generating code, Prettier formats existing code according to its style rules.
js-beautify is a package that can format HTML, CSS, and JavaScript. It is similar to Prettier in that it formats existing code. It is not specifically designed for code generation like code-block-writer.
Recast is a JavaScript AST tool that allows you to parse your code, modify it, and then generate new code. It is more complex than code-block-writer as it deals with abstract syntax trees, but it can be used for similar code generation tasks.
A simple code writer that assists with formatting and visualizing blocks of code.
import CodeBlockWriter from "code-block-writer";
const writer = new CodeBlockWriter({ newLine: "\r\n" }); // optional options (newLine defaults to "\n")
const className = "MyClass";
writer.write(`class ${className} extends OtherClass`).block(() => {
writer.writeLine(`@MyDecorator("myArgument1", "myArgument2")`);
writer.write(`myMethod(myParam: any)`).block(() => {
writer.write(`return this.post("myArgument");`);
});
});
console.log(writer.toString());
Outputs:
class MyClass extends OtherClass {
@MyDecorator("myArgument1", "myArgument2")
myMethod(myParam: any) {
return this.post("myArgument");
}
}
FAQs
A simple code writer that assists with formatting and visualizing blocks of code.
We found that code-block-writer demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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